Merge remote-tracking branch 'github/master' into changing_unwrap_ref

2020-04-13 18:32:14 +01:00 · 2020-04-13 18:32:14 +01:00 · 6a66b7b60a
commit 6a66b7b60a
parent c20d8af8c0 7cbf684611
54 changed files with 1175 additions and 2676 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -1,3 +1,42 @@
+# [3.0.0-alpha.12](https://github.com/vuejs/vue-next/compare/v3.0.0-alpha.11...v3.0.0-alpha.12) (2020-04-08)
+
+
+### Bug Fixes
+
+* **compiler:** should not condense `&nbsp;` ([8c17535](https://github.com/vuejs/vue-next/commit/8c17535a470501f7f4ec3747cd3de25d9169c505)), closes [#945](https://github.com/vuejs/vue-next/issues/945)
+* **compiler:** should only strip leading newline directly in pre tag ([be666eb](https://github.com/vuejs/vue-next/commit/be666ebd59027eb2fc96595c1a6054ecf62832e8))
+* **compiler:** support full range of entity decoding in browser builds ([1f6e72b](https://github.com/vuejs/vue-next/commit/1f6e72b11051561abe270fa233cf52d5aba01d6b))
+* **compiler-core:** elements with dynamic keys should be forced into blocks ([d531686](https://github.com/vuejs/vue-next/commit/d531686f9154c2ef7f1d877c275df62a8d8da2a5)), closes [#916](https://github.com/vuejs/vue-next/issues/916)
+* **reactivity:** track reactive keys in raw collection types ([5dcc645](https://github.com/vuejs/vue-next/commit/5dcc645fc068f9a467fa31ba2d3c2a59e68a9fd7)), closes [#919](https://github.com/vuejs/vue-next/issues/919)
+* **runtime-core:** fix globalProperties in check on instance render proxy ([c28a919](https://github.com/vuejs/vue-next/commit/c28a9196b2165e8ce274b2708d6d772024c2933a))
+* **runtime-core:** set fragment root children should also update dynamicChildren ([#944](https://github.com/vuejs/vue-next/issues/944)) ([a27e9ee](https://github.com/vuejs/vue-next/commit/a27e9ee9aea3487ef3ef0c8a5df53227fc172886)), closes [#943](https://github.com/vuejs/vue-next/issues/943)
+* **runtime-dom:** fix getModelAssigner order in vModelCheckbox ([#926](https://github.com/vuejs/vue-next/issues/926)) ([da1fb7a](https://github.com/vuejs/vue-next/commit/da1fb7afef75470826501fe6e9d81e5af296fea7))
+* **runtime-dom:** support native onxxx handlers ([2302dea](https://github.com/vuejs/vue-next/commit/2302dea1624d4b964fed71e30089426212091c11)), closes [#927](https://github.com/vuejs/vue-next/issues/927)
+* **slots:** should update compiled dynamic slots ([8444078](https://github.com/vuejs/vue-next/commit/84440780f9e45aa5b060180078b769f27757c7bd))
+* **transition:** fix dynamic transition update on nested HOCs ([b8da8b2](https://github.com/vuejs/vue-next/commit/b8da8b2dfac96558df1d038aac3bbe63bd42a8ce))
+* **transition:** should ship props declarations in production ([4227831](https://github.com/vuejs/vue-next/commit/42278317e15a202e4e1c8f7084eafa7bb13f1ade))
+* **types:** accept generic Component type in h() ([c1d5928](https://github.com/vuejs/vue-next/commit/c1d5928f3b240a4a69bcd8d88494e4fe8d2e625b)), closes [#922](https://github.com/vuejs/vue-next/issues/922)
+* **v-model:** handle dynamic assigners and array assigners ([f42d11e](https://github.com/vuejs/vue-next/commit/f42d11e8e19f7356f4e1629cd07c774c9af39288)), closes [#923](https://github.com/vuejs/vue-next/issues/923)
+
+
+### Features
+
+* **asyncComponent:** add `onError` option for defineAsyncComponent ([e804463](https://github.com/vuejs/vue-next/commit/e80446349215159c002223a41baeb5a8bc0f444c))
+* **runtime-core:** improve component public instance proxy inspection ([899287a](https://github.com/vuejs/vue-next/commit/899287ad35d8b74e76a71f39772a92f261dfa4f8))
+
+
+### BREAKING CHANGES
+
+* **compiler:** compiler options have been adjusted.
+    - new option `decodeEntities` is added.
+    - `namedCharacterReferences` option has been removed.
+    - `maxCRNameLength` option has been rmeoved.
+* **asyncComponent:** `retryWhen` and `maxRetries` options for
+`defineAsyncComponent` has been replaced by the more flexible `onError`
+option, per https://github.com/vuejs/rfcs/pull/148
+
+
+
 # [3.0.0-alpha.11](https://github.com/vuejs/vue-next/compare/v3.0.0-alpha.10...v3.0.0-alpha.11) (2020-04-04)


@ -11,7 +50,7 @@
 * **reactivity:** scheduled effect should not execute if stopped ([0764c33](https://github.com/vuejs/vue-next/commit/0764c33d3da8c06d472893a4e451e33394726a42)), closes [#910](https://github.com/vuejs/vue-next/issues/910)
 * **runtime-core:** support attr merging on child with root level comments ([e42cb54](https://github.com/vuejs/vue-next/commit/e42cb543947d4286115b6adae6e8a5741d909f14)), closes [#904](https://github.com/vuejs/vue-next/issues/904)
 * **runtime-dom:** v-cloak should be removed after compile on the root element ([#893](https://github.com/vuejs/vue-next/issues/893)) ([0ed147d](https://github.com/vuejs/vue-next/commit/0ed147d33610b86af72cbadcc4b32e6069bcaf08)), closes [#890](https://github.com/vuejs/vue-next/issues/890)
-* **runtome-dom:** properly support creating customized built-in element ([b1d0b04](https://github.com/vuejs/vue-next/commit/b1d0b046afb1e8f4640d8d80b6eeaf9f89e892f7))
+* **runtime-dom:** properly support creating customized built-in element ([b1d0b04](https://github.com/vuejs/vue-next/commit/b1d0b046afb1e8f4640d8d80b6eeaf9f89e892f7))
 * **transition:** warn only when there is more than one rendered child ([#903](https://github.com/vuejs/vue-next/issues/903)) ([37b1dc8](https://github.com/vuejs/vue-next/commit/37b1dc8242608b072d14fd2a5e52f5d40829ea52))
 * **types:** allow use PropType with Function ([#915](https://github.com/vuejs/vue-next/issues/915)) ([026eb72](https://github.com/vuejs/vue-next/commit/026eb729f3d1566e95f2f4253d76c20e86d1ec9b)), closes [#748](https://github.com/vuejs/vue-next/issues/748)
 * **types:** export missing types from runtime-core ([#889](https://github.com/vuejs/vue-next/issues/889)) ([412ec86](https://github.com/vuejs/vue-next/commit/412ec86128fa33fa41ce435c493fd8275a785fea))
--- a/package.json
+++ b/package.json
@ -1,6 +1,6 @@
 {
  "private": true,
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "workspaces": [
    "packages/*"
  ],
--- a/packages/compiler-core/tests/snapshots/parse.spec.ts.snap
+++ b/packages/compiler-core/tests/snapshots/parse.spec.ts.snap
--- a/packages/compiler-core/tests/parse.spec.ts
+++ b/packages/compiler-core/tests/parse.spec.ts
@ -9,7 +9,6 @@ import {
  NodeTypes,
  Position,
  TextNode,
-  AttributeNode,
  InterpolationNode
 } from '../src/ast'

@ -163,114 +162,6 @@ describe('compiler: parse', () => {
        }
      })
    })
-
-    test('HTML entities compatibility in text (https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state).', () => {
-      const spy = jest.fn()
-      const ast = baseParse('&ampersand;', {
-        namedCharacterReferences: { amp: '&' },
-        onError: spy
-      })
-      const text = ast.children[0] as TextNode
-
-      expect(text).toStrictEqual({
-        type: NodeTypes.TEXT,
-        content: '&ersand;',
-        loc: {
-          start: { offset: 0, line: 1, column: 1 },
-          end: { offset: 11, line: 1, column: 12 },
-          source: '&ampersand;'
-        }
-      })
-      expect(spy.mock.calls).toMatchObject([
-        [
-          {
-            code: ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE,
-            loc: {
-              start: { offset: 4, line: 1, column: 5 }
-            }
-          }
-        ]
-      ])
-    })
-
-    test('HTML entities compatibility in attribute (https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state).', () => {
-      const spy = jest.fn()
-      const ast = baseParse(
-        '<div a="&ampersand;" b="&amp;ersand;" c="&amp!"></div>',
-        {
-          namedCharacterReferences: { amp: '&', 'amp;': '&' },
-          onError: spy
-        }
-      )
-      const element = ast.children[0] as ElementNode
-      const text1 = (element.props[0] as AttributeNode).value
-      const text2 = (element.props[1] as AttributeNode).value
-      const text3 = (element.props[2] as AttributeNode).value
-
-      expect(text1).toStrictEqual({
-        type: NodeTypes.TEXT,
-        content: '&ampersand;',
-        loc: {
-          start: { offset: 7, line: 1, column: 8 },
-          end: { offset: 20, line: 1, column: 21 },
-          source: '"&ampersand;"'
-        }
-      })
-      expect(text2).toStrictEqual({
-        type: NodeTypes.TEXT,
-        content: '&ersand;',
-        loc: {
-          start: { offset: 23, line: 1, column: 24 },
-          end: { offset: 37, line: 1, column: 38 },
-          source: '"&amp;ersand;"'
-        }
-      })
-      expect(text3).toStrictEqual({
-        type: NodeTypes.TEXT,
-        content: '&!',
-        loc: {
-          start: { offset: 40, line: 1, column: 41 },
-          end: { offset: 47, line: 1, column: 48 },
-          source: '"&amp!"'
-        }
-      })
-      expect(spy.mock.calls).toMatchObject([
-        [
-          {
-            code: ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE,
-            loc: {
-              start: { offset: 45, line: 1, column: 46 }
-            }
-          }
-        ]
-      ])
-    })
-
-    test('Some control character reference should be replaced.', () => {
-      const spy = jest.fn()
-      const ast = baseParse('&#x86;', { onError: spy })
-      const text = ast.children[0] as TextNode
-
-      expect(text).toStrictEqual({
-        type: NodeTypes.TEXT,
-        content: '†',
-        loc: {
-          start: { offset: 0, line: 1, column: 1 },
-          end: { offset: 6, line: 1, column: 7 },
-          source: '&#x86;'
-        }
-      })
-      expect(spy.mock.calls).toMatchObject([
-        [
-          {
-            code: ErrorCodes.CONTROL_CHARACTER_REFERENCE,
-            loc: {
-              start: { offset: 0, line: 1, column: 1 }
-            }
-          }
-        ]
-      ])
-    })
  })

  describe('Interpolation', () => {
@ -1652,12 +1543,10 @@ foo
    expect(baz.loc.end).toEqual({ line: 2, column: 28, offset })
  })

-  describe('namedCharacterReferences option', () => {
+  describe('decodeEntities option', () => {
    test('use the given map', () => {
      const ast: any = baseParse('&amp;&cups;', {
-        namedCharacterReferences: {
-          'cups;': '\u222A\uFE00' // UNION with serifs
-        },
+        decodeEntities: text => text.replace('&cups;', '\u222A\uFE00'),
        onError: () => {} // Ignore errors
      })

@ -1756,60 +1645,6 @@ foo
          errors: []
        }
      ],
-      ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE: [
-        {
-          code: '<template>&#a;</template>',
-          errors: [
-            {
-              type: ErrorCodes.ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        },
-        {
-          code: '<template>&#xg;</template>',
-          errors: [
-            {
-              type: ErrorCodes.ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        },
-        {
-          code: '<template>&#99;</template>',
-          errors: []
-        },
-        {
-          code: '<template>&#xff;</template>',
-          errors: []
-        },
-        {
-          code: '<template attr="&#a;"></template>',
-          errors: [
-            {
-              type: ErrorCodes.ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE,
-              loc: { offset: 16, line: 1, column: 17 }
-            }
-          ]
-        },
-        {
-          code: '<template attr="&#xg;"></template>',
-          errors: [
-            {
-              type: ErrorCodes.ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE,
-              loc: { offset: 16, line: 1, column: 17 }
-            }
-          ]
-        },
-        {
-          code: '<template attr="&#99;"></template>',
-          errors: []
-        },
-        {
-          code: '<template attr="&#xff;"></template>',
-          errors: []
-        }
-      ],
      CDATA_IN_HTML_CONTENT: [
        {
          code: '<template><![CDATA[cdata]]></template>',
@ -1825,37 +1660,6 @@ foo
          errors: []
        }
      ],
-      CHARACTER_REFERENCE_OUTSIDE_UNICODE_RANGE: [
-        {
-          code: '<template>&#1234567;</template>',
-          errors: [
-            {
-              type: ErrorCodes.CHARACTER_REFERENCE_OUTSIDE_UNICODE_RANGE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        }
-      ],
-      CONTROL_CHARACTER_REFERENCE: [
-        {
-          code: '<template>&#0003;</template>',
-          errors: [
-            {
-              type: ErrorCodes.CONTROL_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        },
-        {
-          code: '<template>&#x7F;</template>',
-          errors: [
-            {
-              type: ErrorCodes.CONTROL_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        }
-      ],
      DUPLICATE_ATTRIBUTE: [
        {
          code: '<template><div id="" id=""></div></template>',
@ -2412,36 +2216,6 @@ foo
          ]
        }
      ],
-      MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE: [
-        {
-          code: '<template>&amp</template>',
-          options: { namedCharacterReferences: { amp: '&' } },
-          errors: [
-            {
-              type: ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE,
-              loc: { offset: 14, line: 1, column: 15 }
-            }
-          ]
-        },
-        {
-          code: '<template>&#40</template>',
-          errors: [
-            {
-              type: ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE,
-              loc: { offset: 14, line: 1, column: 15 }
-            }
-          ]
-        },
-        {
-          code: '<template>&#x40</template>',
-          errors: [
-            {
-              type: ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE,
-              loc: { offset: 15, line: 1, column: 16 }
-            }
-          ]
-        }
-      ],
      MISSING_WHITESPACE_BETWEEN_ATTRIBUTES: [
        {
          code: '<template><div id="foo"class="bar"></div></template>',
@ -2500,48 +2274,6 @@ foo
          ]
        }
      ],
-      NONCHARACTER_CHARACTER_REFERENCE: [
-        {
-          code: '<template>&#xFFFE;</template>',
-          errors: [
-            {
-              type: ErrorCodes.NONCHARACTER_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        },
-        {
-          code: '<template>&#x1FFFF;</template>',
-          errors: [
-            {
-              type: ErrorCodes.NONCHARACTER_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        }
-      ],
-      NULL_CHARACTER_REFERENCE: [
-        {
-          code: '<template>&#0000;</template>',
-          errors: [
-            {
-              type: ErrorCodes.NULL_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        }
-      ],
-      SURROGATE_CHARACTER_REFERENCE: [
-        {
-          code: '<template>&#xD800;</template>',
-          errors: [
-            {
-              type: ErrorCodes.SURROGATE_CHARACTER_REFERENCE,
-              loc: { offset: 10, line: 1, column: 11 }
-            }
-          ]
-        }
-      ],
      UNEXPECTED_CHARACTER_IN_ATTRIBUTE_NAME: [
        {
          code: "<template><div a\"bc=''></div></template>",
--- a/packages/compiler-core/tests/transforms/transformElement.spec.ts
+++ b/packages/compiler-core/tests/transforms/transformElement.spec.ts
@ -739,6 +739,15 @@ describe('compiler: element transform', () => {
      expect(node.dynamicProps).toBe(`["foo", "baz"]`)
    })

+    // should treat `class` and `style` as PROPS
+    test('PROPS on component', () => {
+      const { node } = parseWithBind(
+        `<Foo :id="foo" :class="cls" :style="styl" />`
+      )
+      expect(node.patchFlag).toBe(genFlagText(PatchFlags.PROPS))
+      expect(node.dynamicProps).toBe(`["id", "class", "style"]`)
+    })
+
    test('FULL_PROPS (v-bind)', () => {
      const { node } = parseWithBind(`<div v-bind="foo" />`)
      expect(node.patchFlag).toBe(genFlagText(PatchFlags.FULL_PROPS))
--- a/packages/compiler-core/package.json
+++ b/packages/compiler-core/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/compiler-core",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/compiler-core",
  "main": "index.js",
  "module": "dist/compiler-core.esm-bundler.js",
@ -30,7 +30,7 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/compiler-core#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
+    "@vue/shared": "3.0.0-alpha.12",
    "@babel/parser": "^7.8.6",
    "@babel/types": "^7.8.6",
    "estree-walker": "^0.8.1",
--- a/packages/compiler-core/src/errors.ts
+++ b/packages/compiler-core/src/errors.ts
@ -32,10 +32,7 @@ export function createCompilerError<T extends number>(
 export const enum ErrorCodes {
  // parse errors
  ABRUPT_CLOSING_OF_EMPTY_COMMENT,
-  ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE,
  CDATA_IN_HTML_CONTENT,
-  CHARACTER_REFERENCE_OUTSIDE_UNICODE_RANGE,
-  CONTROL_CHARACTER_REFERENCE,
  DUPLICATE_ATTRIBUTE,
  END_TAG_WITH_ATTRIBUTES,
  END_TAG_WITH_TRAILING_SOLIDUS,
@ -49,12 +46,8 @@ export const enum ErrorCodes {
  INVALID_FIRST_CHARACTER_OF_TAG_NAME,
  MISSING_ATTRIBUTE_VALUE,
  MISSING_END_TAG_NAME,
-  MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE,
  MISSING_WHITESPACE_BETWEEN_ATTRIBUTES,
  NESTED_COMMENT,
-  NONCHARACTER_CHARACTER_REFERENCE,
-  NULL_CHARACTER_REFERENCE,
-  SURROGATE_CHARACTER_REFERENCE,
  UNEXPECTED_CHARACTER_IN_ATTRIBUTE_NAME,
  UNEXPECTED_CHARACTER_IN_UNQUOTED_ATTRIBUTE_VALUE,
  UNEXPECTED_EQUALS_SIGN_BEFORE_ATTRIBUTE_NAME,
@ -101,14 +94,8 @@ export const enum ErrorCodes {
 export const errorMessages: { [code: number]: string } = {
  // parse errors
  [ErrorCodes.ABRUPT_CLOSING_OF_EMPTY_COMMENT]: 'Illegal comment.',
-  [ErrorCodes.ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE]:
-    'Illegal numeric character reference: invalid character.',
  [ErrorCodes.CDATA_IN_HTML_CONTENT]:
    'CDATA section is allowed only in XML context.',
-  [ErrorCodes.CHARACTER_REFERENCE_OUTSIDE_UNICODE_RANGE]:
-    'Illegal numeric character reference: too big.',
-  [ErrorCodes.CONTROL_CHARACTER_REFERENCE]:
-    'Illegal numeric character reference: control character.',
  [ErrorCodes.DUPLICATE_ATTRIBUTE]: 'Duplicate attribute.',
  [ErrorCodes.END_TAG_WITH_ATTRIBUTES]: 'End tag cannot have attributes.',
  [ErrorCodes.END_TAG_WITH_TRAILING_SOLIDUS]: "Illegal '/' in tags.",
@ -124,17 +111,9 @@ export const errorMessages: { [code: number]: string } = {
    "Illegal tag name. Use '&lt;' to print '<'.",
  [ErrorCodes.MISSING_ATTRIBUTE_VALUE]: 'Attribute value was expected.',
  [ErrorCodes.MISSING_END_TAG_NAME]: 'End tag name was expected.',
-  [ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE]:
-    'Semicolon was expected.',
  [ErrorCodes.MISSING_WHITESPACE_BETWEEN_ATTRIBUTES]:
    'Whitespace was expected.',
  [ErrorCodes.NESTED_COMMENT]: "Unexpected '<!--' in comment.",
-  [ErrorCodes.NONCHARACTER_CHARACTER_REFERENCE]:
-    'Illegal numeric character reference: non character.',
-  [ErrorCodes.NULL_CHARACTER_REFERENCE]:
-    'Illegal numeric character reference: null character.',
-  [ErrorCodes.SURROGATE_CHARACTER_REFERENCE]:
-    'Illegal numeric character reference: non-pair surrogate.',
  [ErrorCodes.UNEXPECTED_CHARACTER_IN_ATTRIBUTE_NAME]:
    'Attribute name cannot contain U+0022 ("), U+0027 (\'), and U+003C (<).',
  [ErrorCodes.UNEXPECTED_CHARACTER_IN_UNQUOTED_ATTRIBUTE_VALUE]:
--- a/packages/compiler-core/src/options.ts
+++ b/packages/compiler-core/src/options.ts
@ -26,13 +26,7 @@ export interface ParserOptions {
    parent: ElementNode | undefined
  ) => TextModes
  delimiters?: [string, string] // ['{{', '}}']
-
-  // Map to HTML entities. E.g., `{ "amp;": "&" }`
-  // The full set is https://html.spec.whatwg.org/multipage/named-characters.html#named-character-references
-  namedCharacterReferences?: Record<string, string>
-  // this number is based on the map above, but it should be pre-computed
-  // to avoid the cost on every parse() call.
-  maxCRNameLength?: number
+  decodeEntities?: (rawText: string, asAttr: boolean) => string
  onError?: (error: CompilerError) => void
 }

--- a/packages/compiler-core/src/parse.ts
+++ b/packages/compiler-core/src/parse.ts
@ -30,6 +30,18 @@ type OptionalOptions = 'isNativeTag' | 'isBuiltInComponent'
 type MergedParserOptions = Omit<Required<ParserOptions>, OptionalOptions> &
  Pick<ParserOptions, OptionalOptions>

+// The default decoder only provides escapes for characters reserved as part of
+// the tempalte syntax, and is only used if the custom renderer did not provide
+// a platform-specific decoder.
+const decodeRE = /&(gt|lt|amp|apos|quot);/g
+const decodeMap: Record<string, string> = {
+  gt: '>',
+  lt: '<',
+  amp: '&',
+  apos: "'",
+  quot: '"'
+}
+
 export const defaultParserOptions: MergedParserOptions = {
  delimiters: [`{{`, `}}`],
  getNamespace: () => Namespaces.HTML,
@ -37,14 +49,8 @@ export const defaultParserOptions: MergedParserOptions = {
  isVoidTag: NO,
  isPreTag: NO,
  isCustomElement: NO,
-  namedCharacterReferences: {
-    'gt;': '>',
-    'lt;': '<',
-    'amp;': '&',
-    'apos;': "'",
-    'quot;': '"'
-  },
-  maxCRNameLength: 5,
+  decodeEntities: (rawText: string): string =>
+    rawText.replace(decodeRE, (_, p1) => decodeMap[p1]),
  onError: defaultOnError
 }

@ -57,7 +63,7 @@ export const enum TextModes {
  ATTRIBUTE_VALUE
 }

-interface ParserContext {
+export interface ParserContext {
  options: MergedParserOptions
  readonly originalSource: string
  source: string
@ -194,7 +200,7 @@ function parseChildren(
      for (let i = 0; i < nodes.length; i++) {
        const node = nodes[i]
        if (node.type === NodeTypes.TEXT) {
-          if (!node.content.trim()) {
+          if (!/[^\t\r\n\f ]/.test(node.content)) {
            const prev = nodes[i - 1]
            const next = nodes[i + 1]
            // If:
@ -219,11 +225,11 @@ function parseChildren(
              node.content = ' '
            }
          } else {
-            node.content = node.content.replace(/\s+/g, ' ')
+            node.content = node.content.replace(/[\t\r\n\f ]+/g, ' ')
          }
        }
      }
-    } else {
+    } else if (parent && context.options.isPreTag(parent.tag)) {
      // remove leading newline per html spec
      // https://html.spec.whatwg.org/multipage/grouping-content.html#the-pre-element
      const first = nodes[0]
@ -812,128 +818,21 @@ function parseTextData(
  length: number,
  mode: TextModes
 ): string {
-  let rawText = context.source.slice(0, length)
+  const rawText = context.source.slice(0, length)
+  advanceBy(context, length)
  if (
    mode === TextModes.RAWTEXT ||
    mode === TextModes.CDATA ||
    rawText.indexOf('&') === -1
  ) {
-    advanceBy(context, length)
    return rawText
-  }
-
+  } else {
    // DATA or RCDATA containing "&"". Entity decoding required.
-  const end = context.offset + length
-  let decodedText = ''
-
-  function advance(length: number) {
-    advanceBy(context, length)
-    rawText = rawText.slice(length)
-  }
-
-  while (context.offset < end) {
-    const head = /&(?:#x?)?/i.exec(rawText)
-    if (!head || context.offset + head.index >= end) {
-      const remaining = end - context.offset
-      decodedText += rawText.slice(0, remaining)
-      advance(remaining)
-      break
-    }
-
-    // Advance to the "&".
-    decodedText += rawText.slice(0, head.index)
-    advance(head.index)
-
-    if (head[0] === '&') {
-      // Named character reference.
-      let name = ''
-      let value: string | undefined = undefined
-      if (/[0-9a-z]/i.test(rawText[1])) {
-        for (
-          let length = context.options.maxCRNameLength;
-          !value && length > 0;
-          --length
-        ) {
-          name = rawText.substr(1, length)
-          value = context.options.namedCharacterReferences[name]
-        }
-        if (value) {
-          const semi = name.endsWith(';')
-          if (
-            mode === TextModes.ATTRIBUTE_VALUE &&
-            !semi &&
-            /[=a-z0-9]/i.test(rawText[name.length + 1] || '')
-          ) {
-            decodedText += '&' + name
-            advance(1 + name.length)
-          } else {
-            decodedText += value
-            advance(1 + name.length)
-            if (!semi) {
-              emitError(
-                context,
-                ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE
+    return context.options.decodeEntities(
+      rawText,
+      mode === TextModes.ATTRIBUTE_VALUE
    )
  }
-          }
-        } else {
-          decodedText += '&' + name
-          advance(1 + name.length)
-        }
-      } else {
-        decodedText += '&'
-        advance(1)
-      }
-    } else {
-      // Numeric character reference.
-      const hex = head[0] === '&#x'
-      const pattern = hex ? /^&#x([0-9a-f]+);?/i : /^&#([0-9]+);?/
-      const body = pattern.exec(rawText)
-      if (!body) {
-        decodedText += head[0]
-        emitError(
-          context,
-          ErrorCodes.ABSENCE_OF_DIGITS_IN_NUMERIC_CHARACTER_REFERENCE
-        )
-        advance(head[0].length)
-      } else {
-        // https://html.spec.whatwg.org/multipage/parsing.html#numeric-character-reference-end-state
-        let cp = Number.parseInt(body[1], hex ? 16 : 10)
-        if (cp === 0) {
-          emitError(context, ErrorCodes.NULL_CHARACTER_REFERENCE)
-          cp = 0xfffd
-        } else if (cp > 0x10ffff) {
-          emitError(
-            context,
-            ErrorCodes.CHARACTER_REFERENCE_OUTSIDE_UNICODE_RANGE
-          )
-          cp = 0xfffd
-        } else if (cp >= 0xd800 && cp <= 0xdfff) {
-          emitError(context, ErrorCodes.SURROGATE_CHARACTER_REFERENCE)
-          cp = 0xfffd
-        } else if ((cp >= 0xfdd0 && cp <= 0xfdef) || (cp & 0xfffe) === 0xfffe) {
-          emitError(context, ErrorCodes.NONCHARACTER_CHARACTER_REFERENCE)
-        } else if (
-          (cp >= 0x01 && cp <= 0x08) ||
-          cp === 0x0b ||
-          (cp >= 0x0d && cp <= 0x1f) ||
-          (cp >= 0x7f && cp <= 0x9f)
-        ) {
-          emitError(context, ErrorCodes.CONTROL_CHARACTER_REFERENCE)
-          cp = CCR_REPLACEMENTS[cp] || cp
-        }
-        decodedText += String.fromCodePoint(cp)
-        advance(body[0].length)
-        if (!body![0].endsWith(';')) {
-          emitError(
-            context,
-            ErrorCodes.MISSING_SEMICOLON_AFTER_CHARACTER_REFERENCE
-          )
-        }
-      }
-    }
-  }
-  return decodedText
 }

 function getCursor(context: ParserContext): Position {
@ -1052,34 +951,3 @@ function startsWithEndTagOpen(source: string, tag: string): boolean {
    /[\t\n\f />]/.test(source[2 + tag.length] || '>')
  )
 }
-
-// https://html.spec.whatwg.org/multipage/parsing.html#numeric-character-reference-end-state
-const CCR_REPLACEMENTS: { [key: number]: number | undefined } = {
-  0x80: 0x20ac,
-  0x82: 0x201a,
-  0x83: 0x0192,
-  0x84: 0x201e,
-  0x85: 0x2026,
-  0x86: 0x2020,
-  0x87: 0x2021,
-  0x88: 0x02c6,
-  0x89: 0x2030,
-  0x8a: 0x0160,
-  0x8b: 0x2039,
-  0x8c: 0x0152,
-  0x8e: 0x017d,
-  0x91: 0x2018,
-  0x92: 0x2019,
-  0x93: 0x201c,
-  0x94: 0x201d,
-  0x95: 0x2022,
-  0x96: 0x2013,
-  0x97: 0x2014,
-  0x98: 0x02dc,
-  0x99: 0x2122,
-  0x9a: 0x0161,
-  0x9b: 0x203a,
-  0x9c: 0x0153,
-  0x9e: 0x017e,
-  0x9f: 0x0178
-}
--- a/packages/compiler-core/src/transforms/transformElement.ts
+++ b/packages/compiler-core/src/transforms/transformElement.ts
@ -289,9 +289,9 @@ export function buildProps(
      }
      if (name === 'ref') {
        hasRef = true
-      } else if (name === 'class') {
+      } else if (name === 'class' && !isComponent) {
        hasClassBinding = true
-      } else if (name === 'style') {
+      } else if (name === 'style' && !isComponent) {
        hasStyleBinding = true
      } else if (name !== 'key' && !dynamicPropNames.includes(name)) {
        dynamicPropNames.push(name)
--- a/packages/compiler-dom/tests/parse.spec.ts
+++ b/packages/compiler-dom/tests/parse.spec.ts
@ -5,12 +5,10 @@ import {
  TextNode,
  ErrorCodes,
  ElementTypes,
-  InterpolationNode
+  InterpolationNode,
+  AttributeNode
 } from '@vue/compiler-core'
-import {
-  parserOptionsMinimal as parserOptions,
-  DOMNamespaces
-} from '../src/parserOptionsMinimal'
+import { parserOptions, DOMNamespaces } from '../src/parserOptions'

 describe('DOM parser', () => {
  describe('Text', () => {
@ -141,11 +139,104 @@ describe('DOM parser', () => {

    // #908
    test('<pre> tag should remove leading newline', () => {
-      const rawText = `\nhello`
+      const rawText = `\nhello<div>\nbye</div>`
      const ast = parse(`<pre>${rawText}</pre>`, parserOptions)
-      expect((ast.children[0] as ElementNode).children[0]).toMatchObject({
+      expect((ast.children[0] as ElementNode).children).toMatchObject([
+        {
          type: NodeTypes.TEXT,
-        content: rawText.slice(1)
+          content: `hello`
+        },
+        {
+          type: NodeTypes.ELEMENT,
+          children: [
+            {
+              type: NodeTypes.TEXT,
+              // should not remove the leading newline for nested elements
+              content: `\nbye`
+            }
+          ]
+        }
+      ])
+    })
+
+    // #945
+    test('&nbsp; should not be condensed', () => {
+      const nbsp = String.fromCharCode(160)
+      const ast = parse(`foo&nbsp;&nbsp;bar`, parserOptions)
+      expect(ast.children[0]).toMatchObject({
+        type: NodeTypes.TEXT,
+        content: `foo${nbsp}${nbsp}bar`
+      })
+    })
+
+    // https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state
+    test('HTML entities compatibility in text', () => {
+      const ast = parse('&ampersand;', parserOptions)
+      const text = ast.children[0] as TextNode
+
+      expect(text).toStrictEqual({
+        type: NodeTypes.TEXT,
+        content: '&ersand;',
+        loc: {
+          start: { offset: 0, line: 1, column: 1 },
+          end: { offset: 11, line: 1, column: 12 },
+          source: '&ampersand;'
+        }
+      })
+    })
+
+    // https://html.spec.whatwg.org/multipage/parsing.html#named-character-reference-state
+    test('HTML entities compatibility in attribute', () => {
+      const ast = parse(
+        '<div a="&ampersand;" b="&amp;ersand;" c="&amp!"></div>',
+        parserOptions
+      )
+      const element = ast.children[0] as ElementNode
+      const text1 = (element.props[0] as AttributeNode).value
+      const text2 = (element.props[1] as AttributeNode).value
+      const text3 = (element.props[2] as AttributeNode).value
+
+      expect(text1).toStrictEqual({
+        type: NodeTypes.TEXT,
+        content: '&ampersand;',
+        loc: {
+          start: { offset: 7, line: 1, column: 8 },
+          end: { offset: 20, line: 1, column: 21 },
+          source: '"&ampersand;"'
+        }
+      })
+      expect(text2).toStrictEqual({
+        type: NodeTypes.TEXT,
+        content: '&ersand;',
+        loc: {
+          start: { offset: 23, line: 1, column: 24 },
+          end: { offset: 37, line: 1, column: 38 },
+          source: '"&amp;ersand;"'
+        }
+      })
+      expect(text3).toStrictEqual({
+        type: NodeTypes.TEXT,
+        content: '&!',
+        loc: {
+          start: { offset: 40, line: 1, column: 41 },
+          end: { offset: 47, line: 1, column: 48 },
+          source: '"&amp!"'
+        }
+      })
+    })
+
+    test('Some control character reference should be replaced.', () => {
+      const ast = parse('&#x86;', parserOptions)
+      const text = ast.children[0] as TextNode
+
+      expect(text).toStrictEqual({
+        type: NodeTypes.TEXT,
+        content: '†',
+        loc: {
+          start: { offset: 0, line: 1, column: 1 },
+          end: { offset: 6, line: 1, column: 7 },
+          source: '&#x86;'
+        }
      })
    })
  })
--- a/packages/compiler-dom/package.json
+++ b/packages/compiler-dom/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/compiler-dom",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/compiler-dom",
  "main": "index.js",
  "module": "dist/compiler-dom.esm-bundler.js",
@ -34,7 +34,7 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/compiler-dom#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/compiler-core": "3.0.0-alpha.11"
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/compiler-core": "3.0.0-alpha.12"
  }
 }
--- a/packages/compiler-dom/src/decodeHtml.ts
+++ b/packages/compiler-dom/src/decodeHtml.ts
@ -0,0 +1,133 @@
+import { ParserOptions } from '@vue/compiler-core'
+import namedCharacterReferences from './namedChars.json'
+
+// lazy compute this to make this file tree-shakable for browser
+let maxCRNameLength: number
+
+export const decodeHtml: ParserOptions['decodeEntities'] = (
+  rawText,
+  asAttr
+) => {
+  let offset = 0
+  const end = rawText.length
+  let decodedText = ''
+
+  function advance(length: number) {
+    offset += length
+    rawText = rawText.slice(length)
+  }
+
+  while (offset < end) {
+    const head = /&(?:#x?)?/i.exec(rawText)
+    if (!head || offset + head.index >= end) {
+      const remaining = end - offset
+      decodedText += rawText.slice(0, remaining)
+      advance(remaining)
+      break
+    }
+
+    // Advance to the "&".
+    decodedText += rawText.slice(0, head.index)
+    advance(head.index)
+
+    if (head[0] === '&') {
+      // Named character reference.
+      let name = ''
+      let value: string | undefined = undefined
+      if (/[0-9a-z]/i.test(rawText[1])) {
+        if (!maxCRNameLength) {
+          maxCRNameLength = Object.keys(namedCharacterReferences).reduce(
+            (max, name) => Math.max(max, name.length),
+            0
+          )
+        }
+        for (let length = maxCRNameLength; !value && length > 0; --length) {
+          name = rawText.substr(1, length)
+          value = (namedCharacterReferences as Record<string, string>)[name]
+        }
+        if (value) {
+          const semi = name.endsWith(';')
+          if (
+            asAttr &&
+            !semi &&
+            /[=a-z0-9]/i.test(rawText[name.length + 1] || '')
+          ) {
+            decodedText += '&' + name
+            advance(1 + name.length)
+          } else {
+            decodedText += value
+            advance(1 + name.length)
+          }
+        } else {
+          decodedText += '&' + name
+          advance(1 + name.length)
+        }
+      } else {
+        decodedText += '&'
+        advance(1)
+      }
+    } else {
+      // Numeric character reference.
+      const hex = head[0] === '&#x'
+      const pattern = hex ? /^&#x([0-9a-f]+);?/i : /^&#([0-9]+);?/
+      const body = pattern.exec(rawText)
+      if (!body) {
+        decodedText += head[0]
+        advance(head[0].length)
+      } else {
+        // https://html.spec.whatwg.org/multipage/parsing.html#numeric-character-reference-end-state
+        let cp = Number.parseInt(body[1], hex ? 16 : 10)
+        if (cp === 0) {
+          cp = 0xfffd
+        } else if (cp > 0x10ffff) {
+          cp = 0xfffd
+        } else if (cp >= 0xd800 && cp <= 0xdfff) {
+          cp = 0xfffd
+        } else if ((cp >= 0xfdd0 && cp <= 0xfdef) || (cp & 0xfffe) === 0xfffe) {
+          // noop
+        } else if (
+          (cp >= 0x01 && cp <= 0x08) ||
+          cp === 0x0b ||
+          (cp >= 0x0d && cp <= 0x1f) ||
+          (cp >= 0x7f && cp <= 0x9f)
+        ) {
+          cp = CCR_REPLACEMENTS[cp] || cp
+        }
+        decodedText += String.fromCodePoint(cp)
+        advance(body[0].length)
+      }
+    }
+  }
+  return decodedText
+}
+
+// https://html.spec.whatwg.org/multipage/parsing.html#numeric-character-reference-end-state
+const CCR_REPLACEMENTS: { [key: number]: number | undefined } = {
+  0x80: 0x20ac,
+  0x82: 0x201a,
+  0x83: 0x0192,
+  0x84: 0x201e,
+  0x85: 0x2026,
+  0x86: 0x2020,
+  0x87: 0x2021,
+  0x88: 0x02c6,
+  0x89: 0x2030,
+  0x8a: 0x0160,
+  0x8b: 0x2039,
+  0x8c: 0x0152,
+  0x8e: 0x017d,
+  0x91: 0x2018,
+  0x92: 0x2019,
+  0x93: 0x201c,
+  0x94: 0x201d,
+  0x95: 0x2022,
+  0x96: 0x2013,
+  0x97: 0x2014,
+  0x98: 0x02dc,
+  0x99: 0x2122,
+  0x9a: 0x0161,
+  0x9b: 0x203a,
+  0x9c: 0x0153,
+  0x9e: 0x017e,
+  0x9f: 0x0178
+}
--- a/packages/compiler-dom/src/decodeHtmlBrowser.ts
+++ b/packages/compiler-dom/src/decodeHtmlBrowser.ts
@ -0,0 +1,6 @@
+let decoder: HTMLDivElement
+
+export function decodeHtmlBrowser(raw: string): string {
+  ;(decoder || (decoder = document.createElement('div'))).innerHTML = raw
+  return decoder.textContent as string
+}
--- a/packages/compiler-dom/src/index.ts
+++ b/packages/compiler-dom/src/index.ts
@ -9,8 +9,7 @@ import {
  NodeTransform,
  DirectiveTransform
 } from '@vue/compiler-core'
-import { parserOptionsMinimal } from './parserOptionsMinimal'
-import { parserOptionsStandard } from './parserOptionsStandard'
+import { parserOptions } from './parserOptions'
 import { transformStyle } from './transforms/transformStyle'
 import { transformVHtml } from './transforms/vHtml'
 import { transformVText } from './transforms/vText'
@ -20,9 +19,7 @@ import { transformShow } from './transforms/vShow'
 import { warnTransitionChildren } from './transforms/warnTransitionChildren'
 import { stringifyStatic } from './transforms/stringifyStatic'

-export const parserOptions = __BROWSER__
-  ? parserOptionsMinimal
-  : parserOptionsStandard
+export { parserOptions }

 export const DOMNodeTransforms: NodeTransform[] = [
  transformStyle,
--- a/packages/compiler-dom/src/parserOptionsMinimal.ts
+++ b/packages/compiler-dom/src/parserOptionsMinimal.ts
@ -8,6 +8,8 @@ import {
 } from '@vue/compiler-core'
 import { makeMap, isVoidTag, isHTMLTag, isSVGTag } from '@vue/shared'
 import { TRANSITION, TRANSITION_GROUP } from './runtimeHelpers'
+import { decodeHtml } from './decodeHtml'
+import { decodeHtmlBrowser } from './decodeHtmlBrowser'

 const isRawTextContainer = /*#__PURE__*/ makeMap(
  'style,iframe,script,noscript',
@ -20,10 +22,11 @@ export const enum DOMNamespaces {
  MATH_ML
 }

-export const parserOptionsMinimal: ParserOptions = {
+export const parserOptions: ParserOptions = {
  isVoidTag,
  isNativeTag: tag => isHTMLTag(tag) || isSVGTag(tag),
  isPreTag: tag => tag === 'pre',
+  decodeEntities: __BROWSER__ ? decodeHtmlBrowser : decodeHtml,

  isBuiltInComponent: (tag: string): symbol | undefined => {
    if (isBuiltInType(tag, `Transition`)) {
--- a/packages/compiler-dom/src/parserOptionsStandard.ts
+++ b/packages/compiler-dom/src/parserOptionsStandard.ts
@ -1,15 +0,0 @@
-import { ParserOptions } from '@vue/compiler-core'
-import { parserOptionsMinimal } from './parserOptionsMinimal'
-import namedCharacterReferences from './namedChars.json'
-
-export const parserOptionsStandard: ParserOptions = {
-  // extends the minimal options with more spec-compliant overrides
-  ...parserOptionsMinimal,
-
-  // https://html.spec.whatwg.org/multipage/named-characters.html#named-character-references
-  namedCharacterReferences,
-  maxCRNameLength: /*#__PURE__*/ Object.keys(namedCharacterReferences).reduce(
-    (max, name) => Math.max(max, name.length),
-    0
-  )
-}
--- a/packages/compiler-sfc/package.json
+++ b/packages/compiler-sfc/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/compiler-sfc",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/compiler-sfc",
  "main": "dist/compiler-sfc.cjs.js",
  "types": "dist/compiler-sfc.d.ts",
@ -27,13 +27,13 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/compiler-sfc#readme",
  "peerDependencies": {
-    "vue": "3.0.0-alpha.11"
+    "vue": "3.0.0-alpha.12"
  },
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/compiler-core": "3.0.0-alpha.11",
-    "@vue/compiler-dom": "3.0.0-alpha.11",
-    "@vue/compiler-ssr": "3.0.0-alpha.11",
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/compiler-core": "3.0.0-alpha.12",
+    "@vue/compiler-dom": "3.0.0-alpha.12",
+    "@vue/compiler-ssr": "3.0.0-alpha.12",
    "consolidate": "^0.15.1",
    "hash-sum": "^2.0.0",
    "lru-cache": "^5.1.1",
--- a/packages/compiler-ssr/package.json
+++ b/packages/compiler-ssr/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/compiler-ssr",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/compiler-ssr",
  "main": "dist/compiler-ssr.cjs.js",
  "types": "dist/compiler-ssr.d.ts",
@ -27,7 +27,7 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/compiler-ssr#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/compiler-dom": "3.0.0-alpha.11"
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/compiler-dom": "3.0.0-alpha.12"
  }
 }
--- a/packages/reactivity/package.json
+++ b/packages/reactivity/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/reactivity",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/reactivity",
  "main": "index.js",
  "module": "dist/reactivity.esm-bundler.js",
@ -34,6 +34,6 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/reactivity#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11"
+    "@vue/shared": "3.0.0-alpha.12"
  }
 }
--- a/packages/reactivity/src/ref.ts
+++ b/packages/reactivity/src/ref.ts
@ -101,7 +101,7 @@ function toProxyRef<T extends object, K extends keyof T>(
 // corner case when use narrows type
 // Ex. type RelativePath = string & { __brand: unknown }
 // RelativePath extends object -> true
-type BaseTypes = string | number | boolean
+type BaseTypes = string | number | boolean | Node | Window

 // Super simple tuple checker
 type Tupple<T extends Array<any>> = T[0] extends T[1]
--- a/packages/runtime-core/tests/component.spec.ts
+++ b/packages/runtime-core/tests/component.spec.ts
@ -1,146 +0,0 @@
-import {
-  h,
-  ref,
-  render,
-  nodeOps,
-  nextTick,
-  defineComponent
-} from '@vue/runtime-test'
-
-describe('renderer: component', () => {
-  test.todo('should work')
-
-  test.todo('shouldUpdateComponent')
-
-  test.todo('componentProxy')
-
-  describe('componentProps', () => {
-    test.todo('should work')
-
-    test('should convert empty booleans to true', () => {
-      let b1: any, b2: any, b3: any
-
-      const Comp = defineComponent({
-        props: {
-          b1: Boolean,
-          b2: [Boolean, String],
-          b3: [String, Boolean]
-        },
-        setup(props) {
-          ;({ b1, b2, b3 } = props)
-          return () => ''
-        }
-      })
-
-      render(
-        h(Comp, <any>{ b1: '', b2: '', b3: '' }),
-        nodeOps.createElement('div')
-      )
-
-      expect(b1).toBe(true)
-      expect(b2).toBe(true)
-      expect(b3).toBe('')
-    })
-  })
-
-  describe('slots', () => {
-    test('should respect $stable flag', async () => {
-      const flag1 = ref(1)
-      const flag2 = ref(2)
-      const spy = jest.fn()
-
-      const Child = () => {
-        spy()
-        return 'child'
-      }
-
-      const App = {
-        setup() {
-          return () => [
-            flag1.value,
-            h(
-              Child,
-              { n: flag2.value },
-              {
-                foo: () => 'foo',
-                $stable: true
-              }
-            )
-          ]
-        }
-      }
-
-      render(h(App), nodeOps.createElement('div'))
-      expect(spy).toHaveBeenCalledTimes(1)
-
-      // parent re-render, props didn't change, slots are stable
-      // -> child should not update
-      flag1.value++
-      await nextTick()
-      expect(spy).toHaveBeenCalledTimes(1)
-
-      // parent re-render, props changed
-      // -> child should update
-      flag2.value++
-      await nextTick()
-      expect(spy).toHaveBeenCalledTimes(2)
-    })
-  })
-
-  test('emit', async () => {
-    let noMatchEmitResult: any
-    let singleEmitResult: any
-    let multiEmitResult: any
-
-    const Child = defineComponent({
-      setup(_, { emit }) {
-        noMatchEmitResult = emit('foo')
-        singleEmitResult = emit('bar')
-        multiEmitResult = emit('baz')
-        return () => h('div')
-      }
-    })
-
-    const App = {
-      setup() {
-        return () =>
-          h(Child, {
-            // emit triggering single handler
-            onBar: () => 1,
-            // emit triggering multiple handlers
-            onBaz: [() => Promise.resolve(2), () => Promise.resolve(3)]
-          })
-      }
-    }
-
-    render(h(App), nodeOps.createElement('div'))
-
-    // assert return values from emit
-    expect(noMatchEmitResult).toMatchObject([])
-    expect(singleEmitResult).toMatchObject([1])
-    expect(await Promise.all(multiEmitResult)).toMatchObject([2, 3])
-  })
-
-  // for v-model:foo-bar usage in DOM templates
-  test('emit update:xxx events should trigger kebab-case equivalent', () => {
-    const Child = defineComponent({
-      setup(_, { emit }) {
-        emit('update:fooBar', 1)
-        return () => h('div')
-      }
-    })
-
-    const handler = jest.fn()
-    const App = {
-      setup() {
-        return () =>
-          h(Child, {
-            'onUpdate:foo-bar': handler
-          })
-      }
-    }
-
-    render(h(App), nodeOps.createElement('div'))
-    expect(handler).toHaveBeenCalled()
-  })
-})
--- a/packages/runtime-core/tests/componentEmits.spec.ts
+++ b/packages/runtime-core/tests/componentEmits.spec.ts
@ -5,28 +5,33 @@ import { mockWarn } from '@vue/shared'
 import { render, defineComponent, h, nodeOps } from '@vue/runtime-test'
 import { isEmitListener } from '../src/componentEmits'

-describe('emits option', () => {
+describe('component: emit', () => {
  mockWarn()

-  test('trigger both raw event and capitalize handlers', () => {
+  test('trigger handlers', () => {
    const Foo = defineComponent({
      render() {},
      created() {
        // the `emit` function is bound on component instances
        this.$emit('foo')
        this.$emit('bar')
+        this.$emit('!baz')
      }
    })

    const onfoo = jest.fn()
    const onBar = jest.fn()
-    const Comp = () => h(Foo, { onfoo, onBar })
+    const onBaz = jest.fn()
+    const Comp = () => h(Foo, { onfoo, onBar, ['on!baz']: onBaz })
    render(h(Comp), nodeOps.createElement('div'))

-    expect(onfoo).toHaveBeenCalled()
+    expect(onfoo).not.toHaveBeenCalled()
+    // only capitalized or special chars are considerd event listeners
    expect(onBar).toHaveBeenCalled()
+    expect(onBaz).toHaveBeenCalled()
  })

+  // for v-model:foo-bar usage in DOM templates
  test('trigger hyphendated events for update:xxx events', () => {
    const Foo = defineComponent({
      render() {},
@ -49,6 +54,33 @@ describe('emits option', () => {
    expect(barSpy).toHaveBeenCalled()
  })

+  test('should trigger array of listeners', async () => {
+    const Child = defineComponent({
+      setup(_, { emit }) {
+        emit('foo', 1)
+        return () => h('div')
+      }
+    })
+
+    const fn1 = jest.fn()
+    const fn2 = jest.fn()
+
+    const App = {
+      setup() {
+        return () =>
+          h(Child, {
+            onFoo: [fn1, fn2]
+          })
+      }
+    }
+
+    render(h(App), nodeOps.createElement('div'))
+    expect(fn1).toHaveBeenCalledTimes(1)
+    expect(fn1).toHaveBeenCalledWith(1)
+    expect(fn2).toHaveBeenCalledTimes(1)
+    expect(fn1).toHaveBeenCalledWith(1)
+  })
+
  test('warning for undeclared event (array)', () => {
    const Foo = defineComponent({
      emits: ['foo'],
@ -97,9 +129,9 @@ describe('emits option', () => {

  test('isEmitListener', () => {
    expect(isEmitListener(['click'], 'onClick')).toBe(true)
-    expect(isEmitListener(['click'], 'onclick')).toBe(true)
+    expect(isEmitListener(['click'], 'onclick')).toBe(false)
    expect(isEmitListener({ click: null }, 'onClick')).toBe(true)
-    expect(isEmitListener({ click: null }, 'onclick')).toBe(true)
+    expect(isEmitListener({ click: null }, 'onclick')).toBe(false)
    expect(isEmitListener(['click'], 'onBlick')).toBe(false)
    expect(isEmitListener({ click: null }, 'onBlick')).toBe(false)
  })
--- a/packages/runtime-core/tests/componentProps.spec.ts
+++ b/packages/runtime-core/tests/componentProps.spec.ts
@ -20,7 +20,7 @@ describe('component props', () => {
    let proxy: any

    const Comp = defineComponent({
-      props: ['foo'],
+      props: ['fooBar'],
      render() {
        props = this.$props
        attrs = this.$attrs
@ -29,18 +29,25 @@ describe('component props', () => {
    })

    const root = nodeOps.createElement('div')
-    render(h(Comp, { foo: 1, bar: 2 }), root)
-    expect(proxy.foo).toBe(1)
-    expect(props).toEqual({ foo: 1 })
+    render(h(Comp, { fooBar: 1, bar: 2 }), root)
+    expect(proxy.fooBar).toBe(1)
+    expect(props).toEqual({ fooBar: 1 })
    expect(attrs).toEqual({ bar: 2 })

-    render(h(Comp, { foo: 2, bar: 3, baz: 4 }), root)
-    expect(proxy.foo).toBe(2)
-    expect(props).toEqual({ foo: 2 })
+    // test passing kebab-case and resolving to camelCase
+    render(h(Comp, { 'foo-bar': 2, bar: 3, baz: 4 }), root)
+    expect(proxy.fooBar).toBe(2)
+    expect(props).toEqual({ fooBar: 2 })
+    expect(attrs).toEqual({ bar: 3, baz: 4 })
+
+    // test updating kebab-case should not delete it (#955)
+    render(h(Comp, { 'foo-bar': 3, bar: 3, baz: 4 }), root)
+    expect(proxy.fooBar).toBe(3)
+    expect(props).toEqual({ fooBar: 3 })
    expect(attrs).toEqual({ bar: 3, baz: 4 })

    render(h(Comp, { qux: 5 }), root)
-    expect(proxy.foo).toBeUndefined()
+    expect(proxy.fooBar).toBeUndefined()
    expect(props).toEqual({})
    expect(attrs).toEqual({ qux: 5 })
  })
--- a/packages/runtime-core/tests/componentSlots.spec.ts
+++ b/packages/runtime-core/tests/componentSlots.spec.ts
@ -0,0 +1,47 @@
+import { ref, render, h, nodeOps, nextTick } from '@vue/runtime-test'
+
+describe('component: slots', () => {
+  // TODO more tests for slots normalization etc.
+
+  test('should respect $stable flag', async () => {
+    const flag1 = ref(1)
+    const flag2 = ref(2)
+    const spy = jest.fn()
+
+    const Child = () => {
+      spy()
+      return 'child'
+    }
+
+    const App = {
+      setup() {
+        return () => [
+          flag1.value,
+          h(
+            Child,
+            { n: flag2.value },
+            {
+              foo: () => 'foo',
+              $stable: true
+            }
+          )
+        ]
+      }
+    }
+
+    render(h(App), nodeOps.createElement('div'))
+    expect(spy).toHaveBeenCalledTimes(1)
+
+    // parent re-render, props didn't change, slots are stable
+    // -> child should not update
+    flag1.value++
+    await nextTick()
+    expect(spy).toHaveBeenCalledTimes(1)
+
+    // parent re-render, props changed
+    // -> child should update
+    flag2.value++
+    await nextTick()
+    expect(spy).toHaveBeenCalledTimes(2)
+  })
+})
--- a/packages/runtime-core/tests/errorHandling.spec.ts
+++ b/packages/runtime-core/tests/errorHandling.spec.ts
@ -416,21 +416,16 @@ describe('error handling', () => {
      }
    }

-    let res: any
    const Child = {
+      props: ['onFoo'],
      setup(props: any, { emit }: any) {
-        res = emit('foo')
+        emit('foo')
        return () => null
      }
    }

    render(h(Comp), nodeOps.createElement('div'))
-
-    try {
-      await Promise.all(res)
-    } catch (e) {
-      expect(e).toBe(err)
-    }
+    await nextTick()
    expect(fn).toHaveBeenCalledWith(err, 'component event handler')
  })

@ -438,6 +433,12 @@ describe('error handling', () => {
    const err = new Error('foo')
    const fn = jest.fn()

+    const res: Promise<any>[] = []
+    const createAsyncHandler = (p: Promise<any>) => () => {
+      res.push(p)
+      return p
+    }
+
    const Comp = {
      setup() {
        onErrorCaptured((err, instance, info) => {
@ -446,15 +447,17 @@ describe('error handling', () => {
        })
        return () =>
          h(Child, {
-            onFoo: [() => Promise.reject(err), () => Promise.resolve(1)]
+            onFoo: [
+              createAsyncHandler(Promise.reject(err)),
+              createAsyncHandler(Promise.resolve(1))
+            ]
          })
      }
    }

-    let res: any
    const Child = {
      setup(props: any, { emit }: any) {
-        res = emit('foo')
+        emit('foo')
        return () => null
      }
    }
--- a/packages/runtime-core/package.json
+++ b/packages/runtime-core/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/runtime-core",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/runtime-core",
  "main": "index.js",
  "module": "dist/runtime-core.esm-bundler.js",
@ -31,7 +31,7 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/runtime-core#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/reactivity": "3.0.0-alpha.11"
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/reactivity": "3.0.0-alpha.12"
  }
 }
--- a/packages/runtime-core/src/component.ts
+++ b/packages/runtime-core/src/component.ts
@ -517,7 +517,7 @@ function createSetupContext(instance: ComponentInternalInstance): SetupContext {
        return new Proxy(instance.slots, slotsHandlers)
      },
      get emit() {
-        return instance.emit
+        return (event: string, ...args: any[]) => instance.emit(event, ...args)
      }
    })
  } else {
--- a/packages/runtime-core/src/componentEmits.ts
+++ b/packages/runtime-core/src/componentEmits.ts
@ -28,12 +28,12 @@ export type EmitFn<
  Options = ObjectEmitsOptions,
  Event extends keyof Options = keyof Options
 > = Options extends any[]
-  ? (event: Options[0], ...args: any[]) => unknown[]
+  ? (event: Options[0], ...args: any[]) => void
  : UnionToIntersection<
      {
        [key in Event]: Options[key] extends ((...args: infer Args) => any)
-          ? (event: key, ...args: Args) => unknown[]
-          : (event: key, ...args: any[]) => unknown[]
+          ? (event: key, ...args: Args) => void
+          : (event: key, ...args: any[]) => void
      }[Event]
    >

@ -41,7 +41,7 @@ export function emit(
  instance: ComponentInternalInstance,
  event: string,
  ...args: any[]
-): any[] {
+) {
  const props = instance.vnode.props || EMPTY_OBJ

  if (__DEV__) {
@ -66,23 +66,20 @@ export function emit(
    }
  }

-  let handler = props[`on${event}`] || props[`on${capitalize(event)}`]
+  let handler = props[`on${capitalize(event)}`]
  // for v-model update:xxx events, also trigger kebab-case equivalent
  // for props passed via kebab-case
  if (!handler && event.indexOf('update:') === 0) {
    event = hyphenate(event)
-    handler = props[`on${event}`] || props[`on${capitalize(event)}`]
+    handler = props[`on${capitalize(event)}`]
  }
  if (handler) {
-    const res = callWithAsyncErrorHandling(
+    callWithAsyncErrorHandling(
      handler,
      instance,
      ErrorCodes.COMPONENT_EVENT_HANDLER,
      args
    )
-    return isArray(res) ? res : [res]
-  } else {
-    return []
  }
 }

--- a/packages/runtime-core/src/componentProps.ts
+++ b/packages/runtime-core/src/componentProps.ts
@ -177,8 +177,15 @@ export function updateProps(
    setFullProps(instance, rawProps, props, attrs)
    // in case of dynamic props, check if we need to delete keys from
    // the props object
+    let kebabKey: string
    for (const key in rawCurrentProps) {
-      if (!rawProps || !hasOwn(rawProps, key)) {
+      if (
+        !rawProps ||
+        (!hasOwn(rawProps, key) &&
+          // it's possible the original props was passed in as kebab-case
+          // and converted to camelCase (#955)
+          ((kebabKey = hyphenate(key)) === key || !hasOwn(rawProps, kebabKey)))
+      ) {
        delete props[key]
      }
    }
--- a/packages/runtime-core/src/componentRenderUtils.ts
+++ b/packages/runtime-core/src/componentRenderUtils.ts
@ -236,14 +236,7 @@ export function shouldUpdateComponent(
    if (patchFlag & PatchFlags.FULL_PROPS) {
      // presence of this flag indicates props are always non-null
      return hasPropsChanged(prevProps!, nextProps!)
-    } else {
-      if (patchFlag & PatchFlags.CLASS) {
-        return prevProps!.class !== nextProps!.class
-      }
-      if (patchFlag & PatchFlags.STYLE) {
-        return hasPropsChanged(prevProps!.style, nextProps!.style)
-      }
-      if (patchFlag & PatchFlags.PROPS) {
+    } else if (patchFlag & PatchFlags.PROPS) {
      const dynamicProps = nextVNode.dynamicProps!
      for (let i = 0; i < dynamicProps.length; i++) {
        const key = dynamicProps[i]
@ -252,7 +245,6 @@ export function shouldUpdateComponent(
        }
      }
    }
-    }
  } else if (!optimized) {
    // this path is only taken by manually written render functions
    // so presence of any children leads to a forced update
--- a/packages/runtime-core/src/renderer.ts
+++ b/packages/runtime-core/src/renderer.ts
@ -968,38 +968,7 @@ function baseCreateRenderer(
        )
      }
    } else {
-      const instance = (n2.component = n1.component)!
-
-      if (shouldUpdateComponent(n1, n2, parentComponent, optimized)) {
-        if (
-          __FEATURE_SUSPENSE__ &&
-          instance.asyncDep &&
-          !instance.asyncResolved
-        ) {
-          // async & still pending - just update props and slots
-          // since the component's reactive effect for render isn't set-up yet
-          if (__DEV__) {
-            pushWarningContext(n2)
-          }
-          updateComponentPreRender(instance, n2, optimized)
-          if (__DEV__) {
-            popWarningContext()
-          }
-          return
-        } else {
-          // normal update
-          instance.next = n2
-          // in case the child component is also queued, remove it to avoid
-          // double updating the same child component in the same flush.
-          invalidateJob(instance.update)
-          // instance.update is the reactive effect runner.
-          instance.update()
-        }
-      } else {
-        // no update needed. just copy over properties
-        n2.component = n1.component
-        n2.el = n1.el
-      }
+      updateComponent(n1, n2, parentComponent, optimized)
    }
  }

@ -1077,6 +1046,45 @@ function baseCreateRenderer(
    }
  }

+  const updateComponent = (
+    n1: VNode,
+    n2: VNode,
+    parentComponent: ComponentInternalInstance | null,
+    optimized: boolean
+  ) => {
+    const instance = (n2.component = n1.component)!
+    if (shouldUpdateComponent(n1, n2, parentComponent, optimized)) {
+      if (
+        __FEATURE_SUSPENSE__ &&
+        instance.asyncDep &&
+        !instance.asyncResolved
+      ) {
+        // async & still pending - just update props and slots
+        // since the component's reactive effect for render isn't set-up yet
+        if (__DEV__) {
+          pushWarningContext(n2)
+        }
+        updateComponentPreRender(instance, n2, optimized)
+        if (__DEV__) {
+          popWarningContext()
+        }
+        return
+      } else {
+        // normal update
+        instance.next = n2
+        // in case the child component is also queued, remove it to avoid
+        // double updating the same child component in the same flush.
+        invalidateJob(instance.update)
+        // instance.update is the reactive effect runner.
+        instance.update()
+      }
+    } else {
+      // no update needed. just copy over properties
+      n2.component = n1.component
+      n2.el = n1.el
+    }
+  }
+
  const setupRenderEffect: SetupRenderEffectFn = (
    instance,
    initialVNode,
--- a/packages/runtime-dom/tests/modules/attrs.spec.ts
+++ b/packages/runtime-dom/tests/modules/attrs.spec.ts
@ -1,27 +0,0 @@
-import { patchAttr, xlinkNS } from '../../src/modules/attrs'
-
-describe('attrs', () => {
-  test('xlink attributes', () => {
-    const el = document.createElementNS('http://www.w3.org/2000/svg', 'use')
-    patchAttr(el, 'xlink:href', 'a', true)
-    expect(el.getAttributeNS(xlinkNS, 'href')).toBe('a')
-    patchAttr(el, 'xlink:href', null, true)
-    expect(el.getAttributeNS(xlinkNS, 'href')).toBe(null)
-  })
-
-  test('boolean attributes', () => {
-    const el = document.createElement('input')
-    patchAttr(el, 'readonly', true, false)
-    expect(el.getAttribute('readonly')).toBe('')
-    patchAttr(el, 'readonly', false, false)
-    expect(el.getAttribute('readonly')).toBe(null)
-  })
-
-  test('attributes', () => {
-    const el = document.createElement('div')
-    patchAttr(el, 'id', 'a', false)
-    expect(el.getAttribute('id')).toBe('a')
-    patchAttr(el, 'id', null, false)
-    expect(el.getAttribute('id')).toBe(null)
-  })
-})
--- a/packages/runtime-dom/tests/modules/class.spec.ts
+++ b/packages/runtime-dom/tests/modules/class.spec.ts
@ -1,188 +0,0 @@
-// https://github.com/vuejs/vue/blob/dev/test/unit/features/directives/class.spec.js
-
-import { h, render, defineComponent } from '../../src'
-
-type ClassItem = {
-  value: string | object | string[]
-}
-
-function assertClass(assertions: Array<Array<any>>) {
-  const root = document.createElement('div')
-  const dynamic = { value: '' }
-  const wrapper = () => h('div', { class: ['foo', dynamic.value] })
-
-  for (const [input, expected] of assertions) {
-    if (typeof input === 'function') {
-      input(dynamic.value)
-    } else {
-      dynamic.value = input
-    }
-
-    render(wrapper(), root)
-    expect(root.children[0].className).toBe(expected)
-  }
-}
-
-describe('class', () => {
-  test('plain string', () => {
-    assertClass([
-      ['bar', 'foo bar'],
-      ['baz qux', 'foo baz qux'],
-      ['qux', 'foo qux'],
-      [undefined, 'foo']
-    ])
-  })
-
-  test('object value', () => {
-    assertClass([
-      [{ bar: true, baz: false }, 'foo bar'],
-      [{ baz: true }, 'foo baz'],
-      [null, 'foo'],
-      [{ 'bar baz': true, qux: false }, 'foo bar baz'],
-      [{ qux: true }, 'foo qux']
-    ])
-  })
-
-  test('array value', () => {
-    assertClass([
-      [['bar', 'baz'], 'foo bar baz'],
-      [['qux', 'baz'], 'foo qux baz'],
-      [['w', 'x y z'], 'foo w x y z'],
-      [undefined, 'foo'],
-      [['bar'], 'foo bar'],
-      [(val: Array<any>) => val.push('baz'), 'foo bar baz']
-    ])
-  })
-
-  test('array of mixed values', () => {
-    assertClass([
-      [['x', { y: true, z: true }], 'foo x y z'],
-      [['x', { y: true, z: false }], 'foo x y'],
-      [['f', { z: true }], 'foo f z'],
-      [['l', 'f', { n: true, z: true }], 'foo l f n z'],
-      [['x', {}], 'foo x'],
-      [undefined, 'foo']
-    ])
-  })
-
-  test('class merge between parent and child', () => {
-    const root = document.createElement('div')
-
-    const childClass: ClassItem = { value: 'd' }
-    const child = {
-      render: () => h('div', { class: ['c', childClass.value] })
-    }
-
-    const parentClass: ClassItem = { value: 'b' }
-    const parent = {
-      render: () => h(child, { class: ['a', parentClass.value] })
-    }
-
-    render(h(parent), root)
-    expect(root.children[0].className).toBe('c d a b')
-
-    parentClass.value = 'e'
-    // the `foo` here is just for forcing parent to be updated
-    // (otherwise it's skipped since its props never change)
-    render(h(parent, { foo: 1 }), root)
-    expect(root.children[0].className).toBe('c d a e')
-
-    parentClass.value = 'f'
-    render(h(parent, { foo: 2 }), root)
-    expect(root.children[0].className).toBe('c d a f')
-
-    parentClass.value = { foo: true }
-    childClass.value = ['bar', 'baz']
-    render(h(parent, { foo: 3 }), root)
-    expect(root.children[0].className).toBe('c bar baz a foo')
-  })
-
-  test('class merge between multiple nested components sharing same element', () => {
-    const component1 = defineComponent({
-      render() {
-        return this.$slots.default!()[0]
-      }
-    })
-
-    const component2 = defineComponent({
-      render() {
-        return this.$slots.default!()[0]
-      }
-    })
-
-    const component3 = defineComponent({
-      render() {
-        return h(
-          'div',
-          {
-            class: 'staticClass'
-          },
-          [this.$slots.default!()]
-        )
-      }
-    })
-
-    const root = document.createElement('div')
-    const componentClass1 = { value: 'componentClass1' }
-    const componentClass2 = { value: 'componentClass2' }
-    const componentClass3 = { value: 'componentClass3' }
-
-    const wrapper = () =>
-      h(component1, { class: componentClass1.value }, () => [
-        h(component2, { class: componentClass2.value }, () => [
-          h(component3, { class: componentClass3.value }, () => ['some text'])
-        ])
-      ])
-
-    render(wrapper(), root)
-    expect(root.children[0].className).toBe(
-      'staticClass componentClass3 componentClass2 componentClass1'
-    )
-
-    componentClass1.value = 'c1'
-    render(wrapper(), root)
-    expect(root.children[0].className).toBe(
-      'staticClass componentClass3 componentClass2 c1'
-    )
-
-    componentClass2.value = 'c2'
-    render(wrapper(), root)
-    expect(root.children[0].className).toBe('staticClass componentClass3 c2 c1')
-
-    componentClass3.value = 'c3'
-    render(wrapper(), root)
-    expect(root.children[0].className).toBe('staticClass c3 c2 c1')
-  })
-
-  test('deep update', () => {
-    const root = document.createElement('div')
-    const test = {
-      a: true,
-      b: false
-    }
-
-    const wrapper = () => h('div', { class: test })
-    render(wrapper(), root)
-    expect(root.children[0].className).toBe('a')
-
-    test.b = true
-    render(wrapper(), root)
-    expect(root.children[0].className).toBe('a b')
-  })
-
-  // a vdom patch edge case where the user has several un-keyed elements of the
-  // same tag next to each other, and toggling them.
-  test('properly remove staticClass for toggling un-keyed children', () => {
-    const root = document.createElement('div')
-    const ok = { value: true }
-    const wrapper = () =>
-      h('div', [ok.value ? h('div', { class: 'a' }) : h('div')])
-
-    render(wrapper(), root)
-    expect(root.children[0].children[0].className).toBe('a')
-
-    ok.value = false
-    render(wrapper(), root)
-    expect(root.children[0].children[0].className).toBe('')
-  })
-})
--- a/packages/runtime-dom/tests/patchAttrs.spec.ts
+++ b/packages/runtime-dom/tests/patchAttrs.spec.ts
@ -0,0 +1,37 @@
+import { patchProp } from '../src/patchProp'
+import { xlinkNS } from '../src/modules/attrs'
+
+describe('runtime-dom: attrs patching', () => {
+  test('xlink attributes', () => {
+    const el = document.createElementNS('http://www.w3.org/2000/svg', 'use')
+    patchProp(el, 'xlink:href', null, 'a', true)
+    expect(el.getAttributeNS(xlinkNS, 'href')).toBe('a')
+    patchProp(el, 'xlink:href', 'a', null, true)
+    expect(el.getAttributeNS(xlinkNS, 'href')).toBe(null)
+  })
+
+  test('boolean attributes', () => {
+    const el = document.createElement('input')
+    patchProp(el, 'readonly', null, true)
+    expect(el.getAttribute('readonly')).toBe('')
+    patchProp(el, 'readonly', true, false)
+    expect(el.getAttribute('readonly')).toBe(null)
+  })
+
+  test('attributes', () => {
+    const el = document.createElement('div')
+    patchProp(el, 'foo', null, 'a')
+    expect(el.getAttribute('foo')).toBe('a')
+    patchProp(el, 'foo', 'a', null)
+    expect(el.getAttribute('foo')).toBe(null)
+  })
+
+  // #949
+  test('onxxx but non-listener attributes', () => {
+    const el = document.createElement('div')
+    patchProp(el, 'onwards', null, 'a')
+    expect(el.getAttribute('onwards')).toBe('a')
+    patchProp(el, 'onwards', 'a', null)
+    expect(el.getAttribute('onwards')).toBe(null)
+  })
+})
--- a/packages/runtime-dom/tests/patchClass.spec.ts
+++ b/packages/runtime-dom/tests/patchClass.spec.ts
@ -0,0 +1,31 @@
+import { patchProp } from '../src/patchProp'
+import { ElementWithTransition } from '../src/components/Transition'
+import { svgNS } from '../src/nodeOps'
+
+describe('runtime-dom: class patching', () => {
+  test('basics', () => {
+    const el = document.createElement('div')
+    patchProp(el, 'class', null, 'foo')
+    expect(el.className).toBe('foo')
+    patchProp(el, 'class', null, null)
+    expect(el.className).toBe('')
+  })
+
+  test('transition class', () => {
+    const el = document.createElement('div') as ElementWithTransition
+    el._vtc = new Set(['bar', 'baz'])
+    patchProp(el, 'class', null, 'foo')
+    expect(el.className).toBe('foo bar baz')
+    patchProp(el, 'class', null, null)
+    expect(el.className).toBe('bar baz')
+    delete el._vtc
+    patchProp(el, 'class', null, 'foo')
+    expect(el.className).toBe('foo')
+  })
+
+  test('svg', () => {
+    const el = document.createElementNS(svgNS, 'svg')
+    patchProp(el, 'class', null, 'foo', true)
+    expect(el.getAttribute('class')).toBe('foo')
+  })
+})
--- a/packages/runtime-dom/tests/modules/events.spec.ts
+++ b/packages/runtime-dom/tests/modules/events.spec.ts
@ -1,13 +1,13 @@
-import { patchEvent } from '../../src/modules/events'
+import { patchProp } from '../src/patchProp'

 const timeout = () => new Promise(r => setTimeout(r))

-describe(`events`, () => {
+describe(`runtime-dom: events patching`, () => {
  it('should assign event handler', async () => {
    const el = document.createElement('div')
    const event = new Event('click')
    const fn = jest.fn()
-    patchEvent(el, 'onClick', null, fn, null)
+    patchProp(el, 'onClick', null, fn)
    el.dispatchEvent(event)
    await timeout()
    el.dispatchEvent(event)
@ -22,9 +22,9 @@ describe(`events`, () => {
    const event = new Event('click')
    const prevFn = jest.fn()
    const nextFn = jest.fn()
-    patchEvent(el, 'onClick', null, prevFn, null)
+    patchProp(el, 'onClick', null, prevFn)
    el.dispatchEvent(event)
-    patchEvent(el, 'onClick', prevFn, nextFn, null)
+    patchProp(el, 'onClick', prevFn, nextFn)
    await timeout()
    el.dispatchEvent(event)
    await timeout()
@ -39,7 +39,7 @@ describe(`events`, () => {
    const event = new Event('click')
    const fn1 = jest.fn()
    const fn2 = jest.fn()
-    patchEvent(el, 'onClick', null, [fn1, fn2], null)
+    patchProp(el, 'onClick', null, [fn1, fn2])
    el.dispatchEvent(event)
    await timeout()
    expect(fn1).toHaveBeenCalledTimes(1)
@ -50,8 +50,8 @@ describe(`events`, () => {
    const el = document.createElement('div')
    const event = new Event('click')
    const fn = jest.fn()
-    patchEvent(el, 'onClick', null, fn, null)
-    patchEvent(el, 'onClick', fn, null, null)
+    patchProp(el, 'onClick', null, fn)
+    patchProp(el, 'onClick', fn, null)
    el.dispatchEvent(event)
    await timeout()
    expect(fn).not.toHaveBeenCalled()
@ -67,7 +67,7 @@ describe(`events`, () => {
        once: true
      }
    }
-    patchEvent(el, 'onClick', null, nextValue, null)
+    patchProp(el, 'onClick', null, nextValue)
    el.dispatchEvent(event)
    await timeout()
    el.dispatchEvent(event)
@ -86,8 +86,8 @@ describe(`events`, () => {
        once: true
      }
    }
-    patchEvent(el, 'onClick', null, prevFn, null)
-    patchEvent(el, 'onClick', prevFn, nextValue, null)
+    patchProp(el, 'onClick', null, prevFn)
+    patchProp(el, 'onClick', prevFn, nextValue)
    el.dispatchEvent(event)
    await timeout()
    el.dispatchEvent(event)
@ -106,8 +106,8 @@ describe(`events`, () => {
        once: true
      }
    }
-    patchEvent(el, 'onClick', null, nextValue, null)
-    patchEvent(el, 'onClick', nextValue, null, null)
+    patchProp(el, 'onClick', null, nextValue)
+    patchProp(el, 'onClick', nextValue, null)
    el.dispatchEvent(event)
    await timeout()
    el.dispatchEvent(event)
@ -115,21 +115,23 @@ describe(`events`, () => {
    expect(fn).not.toHaveBeenCalled()
  })

-  it('should assign native onclick attribute', async () => {
+  it('should support native onclick', async () => {
    const el = document.createElement('div')
    const event = new Event('click')
-    const fn = ((window as any)._nativeClickSpy = jest.fn())

-    patchEvent(el, 'onclick', null, '_nativeClickSpy()' as any)
+    // string should be set as attribute
+    const fn = ((window as any).__globalSpy = jest.fn())
+    patchProp(el, 'onclick', null, '__globalSpy(1)')
    el.dispatchEvent(event)
    await timeout()
-    expect(fn).toHaveBeenCalledTimes(1)
+    delete (window as any).__globalSpy
+    expect(fn).toHaveBeenCalledWith(1)

    const fn2 = jest.fn()
-    patchEvent(el, 'onclick', null, fn2)
+    patchProp(el, 'onclick', '__globalSpy(1)', fn2)
    el.dispatchEvent(event)
    await timeout()
    expect(fn).toHaveBeenCalledTimes(1)
-    expect(fn2).toHaveBeenCalledTimes(1)
+    expect(fn2).toHaveBeenCalledWith(event)
  })
 })
--- a/packages/runtime-dom/tests/patchProps.spec.ts
+++ b/packages/runtime-dom/tests/patchProps.spec.ts
@ -0,0 +1,78 @@
+import { patchProp } from '../src/patchProp'
+import { render, h } from '../src'
+
+describe('runtime-dom: props patching', () => {
+  test('basic', () => {
+    const el = document.createElement('div')
+    patchProp(el, 'id', null, 'foo')
+    expect(el.id).toBe('foo')
+    patchProp(el, 'id', null, null)
+    expect(el.id).toBe('')
+  })
+
+  test('value', () => {
+    const el = document.createElement('input')
+    patchProp(el, 'value', null, 'foo')
+    expect(el.value).toBe('foo')
+    patchProp(el, 'value', null, null)
+    expect(el.value).toBe('')
+    const obj = {}
+    patchProp(el, 'value', null, obj)
+    expect(el.value).toBe(obj.toString())
+    expect((el as any)._value).toBe(obj)
+  })
+
+  test('boolean prop', () => {
+    const el = document.createElement('select')
+    patchProp(el, 'multiple', null, '')
+    expect(el.multiple).toBe(true)
+    patchProp(el, 'multiple', null, null)
+    expect(el.multiple).toBe(false)
+  })
+
+  test('innerHTML unmount prev children', () => {
+    const fn = jest.fn()
+    const comp = {
+      render: () => 'foo',
+      unmounted: fn
+    }
+    const root = document.createElement('div')
+    render(h('div', null, [h(comp)]), root)
+    expect(root.innerHTML).toBe(`<div>foo</div>`)
+
+    render(h('div', { innerHTML: 'bar' }), root)
+    expect(root.innerHTML).toBe(`<div>bar</div>`)
+    expect(fn).toHaveBeenCalled()
+  })
+
+  // #954
+  test('(svg) innerHTML unmount prev children', () => {
+    const fn = jest.fn()
+    const comp = {
+      render: () => 'foo',
+      unmounted: fn
+    }
+    const root = document.createElement('div')
+    render(h('div', null, [h(comp)]), root)
+    expect(root.innerHTML).toBe(`<div>foo</div>`)
+
+    render(h('svg', { innerHTML: '<g></g>' }), root)
+    expect(root.innerHTML).toBe(`<svg><g></g></svg>`)
+    expect(fn).toHaveBeenCalled()
+  })
+
+  test('textContent unmount prev children', () => {
+    const fn = jest.fn()
+    const comp = {
+      render: () => 'foo',
+      unmounted: fn
+    }
+    const root = document.createElement('div')
+    render(h('div', null, [h(comp)]), root)
+    expect(root.innerHTML).toBe(`<div>foo</div>`)
+
+    render(h('div', { textContent: 'bar' }), root)
+    expect(root.innerHTML).toBe(`<div>bar</div>`)
+    expect(fn).toHaveBeenCalled()
+  })
+})
--- a/packages/runtime-dom/tests/modules/style.spec.ts
+++ b/packages/runtime-dom/tests/modules/style.spec.ts
@ -1,39 +1,39 @@
-import { patchStyle } from '../../src/modules/style'
+import { patchProp } from '../src/patchProp'

-describe(`module style`, () => {
+describe(`runtime-dom: style patching`, () => {
  it('string', () => {
    const el = document.createElement('div')
-    patchStyle(el, {}, 'color:red')
+    patchProp(el, 'style', {}, 'color:red')
    expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
  })

  it('plain object', () => {
    const el = document.createElement('div')
-    patchStyle(el, {}, { color: 'red' })
+    patchProp(el, 'style', {}, { color: 'red' })
    expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red;')
  })

  it('camelCase', () => {
    const el = document.createElement('div')
-    patchStyle(el, {}, { marginRight: '10px' })
+    patchProp(el, 'style', {}, { marginRight: '10px' })
    expect(el.style.cssText.replace(/\s/g, '')).toBe('margin-right:10px;')
  })

  it('remove if falsy value', () => {
    const el = document.createElement('div')
-    patchStyle(el, { color: 'red' }, { color: undefined })
+    patchProp(el, 'style', { color: 'red' }, { color: undefined })
    expect(el.style.cssText.replace(/\s/g, '')).toBe('')
  })

  it('!important', () => {
    const el = document.createElement('div')
-    patchStyle(el, {}, { color: 'red !important' })
+    patchProp(el, 'style', {}, { color: 'red !important' })
    expect(el.style.cssText.replace(/\s/g, '')).toBe('color:red!important;')
  })

  it('camelCase with !important', () => {
    const el = document.createElement('div')
-    patchStyle(el, {}, { marginRight: '10px !important' })
+    patchProp(el, 'style', {}, { marginRight: '10px !important' })
    expect(el.style.cssText.replace(/\s/g, '')).toBe(
      'margin-right:10px!important;'
    )
@ -41,7 +41,7 @@ describe(`module style`, () => {

  it('object with multiple entries', () => {
    const el = document.createElement('div')
-    patchStyle(el, {}, { color: 'red', marginRight: '10px' })
+    patchProp(el, 'style', {}, { color: 'red', marginRight: '10px' })
    expect(el.style.getPropertyValue('color')).toBe('red')
    expect(el.style.getPropertyValue('margin-right')).toBe('10px')
  })
@ -65,13 +65,13 @@ describe(`module style`, () => {

  it('CSS custom properties', () => {
    const el = mockElementWithStyle()
-    patchStyle(el as any, {}, { '--theme': 'red' } as any)
+    patchProp(el as any, 'style', {}, { '--theme': 'red' } as any)
    expect(el.style.getPropertyValue('--theme')).toBe('red')
  })

  it('auto vendor prefixing', () => {
    const el = mockElementWithStyle()
-    patchStyle(el as any, {}, { transition: 'all 1s' })
+    patchProp(el as any, 'style', {}, { transition: 'all 1s' })
    expect(el.style.WebkitTransition).toBe('all 1s')
  })
 })
--- a/packages/runtime-dom/package.json
+++ b/packages/runtime-dom/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/runtime-dom",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/runtime-dom",
  "main": "index.js",
  "module": "dist/runtime-dom.esm-bundler.js",
@ -37,8 +37,8 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/runtime-dom#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/runtime-core": "3.0.0-alpha.11",
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/runtime-core": "3.0.0-alpha.12",
    "csstype": "^2.6.8"
  }
 }
--- a/packages/runtime-dom/src/modules/class.ts
+++ b/packages/runtime-dom/src/modules/class.ts
@ -6,15 +6,18 @@ export function patchClass(el: Element, value: string | null, isSVG: boolean) {
  if (value == null) {
    value = ''
  }
-  // directly setting className should be faster than setAttribute in theory
  if (isSVG) {
    el.setAttribute('class', value)
  } else {
+    // directly setting className should be faster than setAttribute in theory
    // if this is an element during a transition, take the temporary transition
    // classes into account.
    const transitionClasses = (el as ElementWithTransition)._vtc
    if (transitionClasses) {
-      value = [value, ...transitionClasses].join(' ')
+      value = (value
+        ? [value, ...transitionClasses]
+        : [...transitionClasses]
+      ).join(' ')
    }
    el.className = value
  }
--- a/packages/runtime-dom/src/modules/events.ts
+++ b/packages/runtime-dom/src/modules/events.ts
@ -1,4 +1,4 @@
-import { EMPTY_OBJ, isString } from '@vue/shared'
+import { EMPTY_OBJ } from '@vue/shared'
 import {
  ComponentInternalInstance,
  callWithAsyncErrorHandling
@ -71,16 +71,6 @@ export function patchEvent(
  nextValue: EventValueWithOptions | EventValue | null,
  instance: ComponentInternalInstance | null = null
 ) {
-  // support native onxxx handlers
-  if (rawName in el) {
-    if (isString(nextValue)) {
-      el.setAttribute(rawName, nextValue)
-    } else {
-      ;(el as any)[rawName] = nextValue
-    }
-    return
-  }
-
  const name = rawName.slice(2).toLowerCase()
  const prevOptions = prevValue && 'options' in prevValue && prevValue.options
  const nextOptions = nextValue && 'options' in nextValue && nextValue.options
--- a/packages/runtime-dom/src/modules/props.ts
+++ b/packages/runtime-dom/src/modules/props.ts
@ -14,8 +14,10 @@ export function patchDOMProp(
  parentSuspense: any,
  unmountChildren: any
 ) {
-  if ((key === 'innerHTML' || key === 'textContent') && prevChildren) {
+  if (key === 'innerHTML' || key === 'textContent') {
+    if (prevChildren) {
      unmountChildren(prevChildren, parentComponent, parentSuspense)
+    }
    el[key] = value == null ? '' : value
    return
  }
--- a/packages/runtime-dom/src/nodeOps.ts
+++ b/packages/runtime-dom/src/nodeOps.ts
@ -1,7 +1,8 @@
 import { RendererOptions } from '@vue/runtime-core'

+export const svgNS = 'http://www.w3.org/2000/svg'
+
 const doc = (typeof document !== 'undefined' ? document : null) as Document
-const svgNS = 'http://www.w3.org/2000/svg'

 let tempContainer: HTMLElement
 let tempSVGContainer: SVGElement
--- a/packages/runtime-dom/src/patchProp.ts
+++ b/packages/runtime-dom/src/patchProp.ts
@ -3,9 +3,11 @@ import { patchStyle } from './modules/style'
 import { patchAttr } from './modules/attrs'
 import { patchDOMProp } from './modules/props'
 import { patchEvent } from './modules/events'
-import { isOn } from '@vue/shared'
+import { isOn, isString, isFunction } from '@vue/shared'
 import { RendererOptions } from '@vue/runtime-core'

+const nativeOnRE = /^on[a-z]/
+
 export const patchProp: RendererOptions<Node, Element>['patchProp'] = (
  el,
  key,
@ -31,7 +33,18 @@ export const patchProp: RendererOptions<Node, Element>['patchProp'] = (
        if (key.indexOf('onUpdate:') < 0) {
          patchEvent(el, key, prevValue, nextValue, parentComponent)
        }
-      } else if (!isSVG && key in el) {
+      } else if (
+        isSVG
+          ? // most keys must be set as attribute on svg elements to work
+            // ...except innerHTML
+            key === 'innerHTML' ||
+            // or native onclick with function values
+            (key in el && nativeOnRE.test(key) && isFunction(nextValue))
+          : // for normal html elements, set as a property if it exists
+            key in el &&
+            // except native onclick with string values
+            !(nativeOnRE.test(key) && isString(nextValue))
+      ) {
        patchDOMProp(
          el,
          key,
--- a/packages/runtime-test/package.json
+++ b/packages/runtime-test/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/runtime-test",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/runtime-test",
  "private": true,
  "main": "index.js",
@ -30,7 +30,7 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/runtime-test#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/runtime-core": "3.0.0-alpha.11"
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/runtime-core": "3.0.0-alpha.12"
  }
 }
--- a/packages/server-renderer/package.json
+++ b/packages/server-renderer/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/server-renderer",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "@vue/server-renderer",
  "main": "index.js",
  "types": "dist/server-renderer.d.ts",
@ -27,10 +27,10 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/server-renderer#readme",
  "peerDependencies": {
-    "vue": "3.0.0-alpha.11"
+    "vue": "3.0.0-alpha.12"
  },
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/compiler-ssr": "3.0.0-alpha.11"
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/compiler-ssr": "3.0.0-alpha.12"
  }
 }
--- a/packages/shared/package.json
+++ b/packages/shared/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/shared",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "internal utils shared across @vue packages",
  "main": "index.js",
  "module": "dist/shared.esm-bundler.js",
--- a/packages/shared/src/index.ts
+++ b/packages/shared/src/index.ts
@ -24,7 +24,8 @@ export const NOOP = () => {}
 */
 export const NO = () => false

-export const isOn = (key: string) => key[0] === 'o' && key[1] === 'n'
+const onRE = /^on[^a-z]/
+export const isOn = (key: string) => onRE.test(key)

 export const extend = <T extends object, U extends object>(
  a: T,
--- a/packages/size-check/package.json
+++ b/packages/size-check/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/size-check",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "private": true,
  "buildOptions": {
    "name": "Vue",
--- a/packages/template-explorer/package.json
+++ b/packages/template-explorer/package.json
@ -1,6 +1,6 @@
 {
  "name": "@vue/template-explorer",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "private": true,
  "buildOptions": {
    "formats": [
--- a/packages/vue/package.json
+++ b/packages/vue/package.json
@ -1,6 +1,6 @@
 {
  "name": "vue",
-  "version": "3.0.0-alpha.11",
+  "version": "3.0.0-alpha.12",
  "description": "vue",
  "main": "index.js",
  "module": "dist/vue.runtime.esm-bundler.js",
@ -36,9 +36,9 @@
  },
  "homepage": "https://github.com/vuejs/vue-next/tree/master/packages/vue#readme",
  "dependencies": {
-    "@vue/shared": "3.0.0-alpha.11",
-    "@vue/compiler-dom": "3.0.0-alpha.11",
-    "@vue/runtime-dom": "3.0.0-alpha.11"
+    "@vue/shared": "3.0.0-alpha.12",
+    "@vue/compiler-dom": "3.0.0-alpha.12",
+    "@vue/runtime-dom": "3.0.0-alpha.12"
  },
  "devDependencies": {
    "lodash": "^4.17.15",
--- a/test-dts/ref.test-d.ts
+++ b/test-dts/ref.test-d.ts
@ -1,7 +1,7 @@
 import { expectType } from 'tsd'
 import { Ref, ref, isRef, unref, UnwrapRef } from './index'

-function foo(arg: number | Ref<number>) {
+function plainType(arg: number | Ref<number>) {
  // ref coercing
  const coerced = ref(arg)
  expectType<Ref<number>>(coerced)
@ -31,4 +31,26 @@ function foo(arg: number | Ref<number>) {
  expectType<Ref<HTMLElement> | Ref<null>>(ref<HTMLElement | null>(null))
 }

-foo(1)
+plainType(1)
+
+function bailType(arg: HTMLElement | Ref<HTMLElement>) {
+  // ref coercing
+  const coerced = ref(arg)
+  expectType<Ref<HTMLElement>>(coerced)
+
+  // isRef as type guard
+  if (isRef(arg)) {
+    expectType<Ref<HTMLElement>>(arg)
+  }
+
+  // ref unwrapping
+  expectType<HTMLElement>(unref(arg))
+
+  // ref inner type should be unwrapped
+  const nestedRef = ref({ foo: ref(document.createElement('DIV')) })
+
+  expectType<Ref<{ foo: HTMLElement }>>(nestedRef)
+  expectType<{ foo: HTMLElement }>(nestedRef.value)
+}
+const el = document.createElement('DIV')
+bailType(el)
--- a/yarn.lock
+++ b/yarn.lock