fix(compiler-dom): bail static stringfication on non-attr bindings

fix #1128

packages/compiler-dom/__tests__/transforms/stringifyStatic.spec.ts

@@ -168,4 +168,29 @@ describe('stringify static html', () => {
       type: NodeTypes.VNODE_CALL
     })
   })
+
+  // #1128
+  test('should bail on non attribute bindings', () => {
+    const { ast } = compileWithStringify(
+      `<div><div><input indeterminate>${repeat(
+        `<span class="foo">foo</span>`,
+        StringifyThresholds.ELEMENT_WITH_BINDING_COUNT
+      )}</div></div>`
+    )
+    expect(ast.hoists.length).toBe(1)
+    expect(ast.hoists[0]).toMatchObject({
+      type: NodeTypes.VNODE_CALL // not CALL_EXPRESSION
+    })
+
+    const { ast: ast2 } = compileWithStringify(
+      `<div><div><input :indeterminate="true">${repeat(
+        `<span class="foo">foo</span>`,
+        StringifyThresholds.ELEMENT_WITH_BINDING_COUNT
+      )}</div></div>`
+    )
+    expect(ast2.hoists.length).toBe(1)
+    expect(ast2.hoists[0]).toMatchObject({
+      type: NodeTypes.VNODE_CALL // not CALL_EXPRESSION
+    })
+  })
 })

packages/compiler-dom/src/transforms/stringifyStatic.ts

@@ -1,3 +1,6 @@
+/**
+ * This module is Node-only.
+ */
 import {
   NodeTypes,
   ElementNode,
@@ -13,6 +16,7 @@ import {
   isVoidTag,
   isString,
   isSymbol,
+  isKnownAttr,
   escapeHtml,
   toDisplayString,
   normalizeClass,
@@ -38,6 +42,11 @@ export const enum StringifyThresholds {
   NODE_COUNT = 20
 }
 
+const dataAriaRE = /^(data|aria)-/
+const isStringifiableAttr = (name: string) => {
+  return isKnownAttr(name) || dataAriaRE.test(name)
+}
+
 // Opt-in heuristics based on:
 // 1. number of elements with attributes > 5.
 // 2. OR: number of total nodes > 20
@@ -47,28 +56,44 @@ export const enum StringifyThresholds {
 function shouldOptimize(node: ElementNode): boolean {
   let bindingThreshold = StringifyThresholds.ELEMENT_WITH_BINDING_COUNT
   let nodeThreshold = StringifyThresholds.NODE_COUNT
-  let bail = false
+
+  let bailed = false
+  const bail = () => {
+    bailed = true
+    return false
+  }
 
   // TODO: check for cases where using innerHTML will result in different
   // output compared to imperative node insertions.
   // probably only need to check for most common case
   // i.e. non-phrasing-content tags inside `<p>`
   function walk(node: ElementNode) {
+    for (let i = 0; i < node.props.length; i++) {
+      const p = node.props[i]
+      // bail on non-attr bindings
+      if (p.type === NodeTypes.ATTRIBUTE && !isStringifiableAttr(p.name)) {
+        return bail()
+      }
+      if (p.type === NodeTypes.DIRECTIVE && p.name === 'bind') {
+        // bail on non-attr bindings
+        if (
+          p.arg &&
+          (p.arg.type === NodeTypes.COMPOUND_EXPRESSION ||
+            (p.arg.isStatic && !isStringifiableAttr(p.arg.content)))
+        ) {
+          return bail()
+        }
         // some transforms, e.g. `transformAssetUrls` in `@vue/compiler-sfc` may
         // convert static attributes into a v-bind with a constnat expresion.
         // Such constant bindings are eligible for hoisting but not for static
         // stringification because they cannot be pre-evaluated.
-    for (let i = 0; i < node.props.length; i++) {
-      const p = node.props[i]
         if (
-        p.type === NodeTypes.DIRECTIVE &&
-        p.name === 'bind' &&
           p.exp &&
-        p.exp.type !== NodeTypes.COMPOUND_EXPRESSION &&
-        p.exp.isRuntimeConstant
+          (p.exp.type === NodeTypes.COMPOUND_EXPRESSION ||
+            p.exp.isRuntimeConstant)
         ) {
-        bail = true
-        return false
+          return bail()
+        }
       }
     }
     for (let i = 0; i < node.children.length; i++) {
@@ -83,7 +108,7 @@ function shouldOptimize(node: ElementNode): boolean {
         if (walk(child)) {
           return true
         }
-        if (bail) {
+        if (bailed) {
           return false
         }
       }

packages/shared/src/domAttrConfig.ts

@@ -1,18 +1,22 @@
 import { makeMap } from './makeMap'
 
-// On the client we only need to offer special cases for boolean attributes that
-// have different names from their corresponding dom properties:
-// - itemscope -> N/A
-// - allowfullscreen -> allowFullscreen
-// - formnovalidate -> formNoValidate
-// - ismap -> isMap
-// - nomodule -> noModule
-// - novalidate -> noValidate
-// - readonly -> readOnly
+/**
+ * On the client we only need to offer special cases for boolean attributes that
+ * have different names from their corresponding dom properties:
+ * - itemscope -> N/A
+ * - allowfullscreen -> allowFullscreen
+ * - formnovalidate -> formNoValidate
+ * - ismap -> isMap
+ * - nomodule -> noModule
+ * - novalidate -> noValidate
+ * - readonly -> readOnly
+ */
 const specialBooleanAttrs = `itemscope,allowfullscreen,formnovalidate,ismap,nomodule,novalidate,readonly`
 export const isSpecialBooleanAttr = /*#__PURE__*/ makeMap(specialBooleanAttrs)
 
-// The full list is needed during SSR to produce the correct initial markup.
+/**
+ * The full list is needed during SSR to produce the correct initial markup.
+ */
 export const isBooleanAttr = /*#__PURE__*/ makeMap(
   specialBooleanAttrs +
     `,async,autofocus,autoplay,controls,default,defer,disabled,hidden,` +
@@ -41,7 +45,9 @@ export const propsToAttrMap: Record<string, string | undefined> = {
   httpEquiv: 'http-equiv'
 }
 
-// CSS properties that accept plain numbers
+/**
+ * CSS properties that accept plain numbers
+ */
 export const isNoUnitNumericStyleProp = /*#__PURE__*/ makeMap(
   `animation-iteration-count,border-image-outset,border-image-slice,` +
     `border-image-width,box-flex,box-flex-group,box-ordinal-group,column-count,` +
@@ -53,3 +59,27 @@ export const isNoUnitNumericStyleProp = /*#__PURE__*/ makeMap(
     `fill-opacity,flood-opacity,stop-opacity,stroke-dasharray,stroke-dashoffset,` +
     `stroke-miterlimit,stroke-opacity,stroke-width`
 )
+
+/**
+ * Known attributes, this is used for stringification of runtime static nodes
+ * so that we don't stringify bindings that cannot be set from HTML.
+ * Don't also forget to allow `data-*` and `aria-*`!
+ * Generated from https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes
+ */
+export const isKnownAttr = /*#__PURE__*/ makeMap(
+  `accept,accept-charset,accesskey,action,align,allow,alt,async,` +
+    `autocapitalize,autocomplete,autofocus,autoplay,background,bgcolor,` +
+    `border,buffered,capture,challenge,charset,checked,cite,class,code,` +
+    `codebase,color,cols,colspan,content,contenteditable,contextmenu,controls,` +
+    `coords,crossorigin,csp,data,datetime,decoding,default,defer,dir,dirname,` +
+    `disabled,download,draggable,dropzone,enctype,enterkeyhint,for,form,` +
+    `formaction,formenctype,formmethod,formnovalidate,formtarget,headers,` +
+    `height,hidden,high,href,hreflang,http-equiv,icon,id,importance,integrity,` +
+    `ismap,itemprop,keytype,kind,label,lang,language,loading,list,loop,low,` +
+    `manifest,max,maxlength,minlength,media,min,multiple,muted,name,novalidate,` +
+    `open,optimum,pattern,ping,placeholder,poster,preload,radiogroup,readonly,` +
+    `referrerpolicy,rel,required,reversed,rows,rowspan,sandbox,scope,scoped,` +
+    `selected,shape,size,sizes,slot,span,spellcheck,src,srcdoc,srclang,srcset,` +
+    `start,step,style,summary,tabindex,target,title,translate,type,usemap,` +
+    `value,width,wrap`
+)