test: update tests and snapshots for helper prefixing

packages/compiler-core/__tests__/__snapshots__/codegen.spec.ts.snap

@@ -27,9 +27,9 @@ export function render() {
   const _ctx = this
   const _cache = _ctx.$cache
   return _cache[1] || (
-    setBlockTracking(-1),
+    _setBlockTracking(-1),
     _cache[1] = foo,
-    setBlockTracking(1),
+    _setBlockTracking(1),
     _cache[1]
   )
 }"
@@ -126,7 +126,7 @@ return function render() {
 `;
 
 exports[`compiler: codegen function mode preamble w/ prefixIdentifiers: true 1`] = `
-"const { createVNode, resolveDirective } = Vue
+"const { createVNode: _createVNode, resolveDirective: _resolveDirective } = Vue
 
 return function render() {
   const _ctx = this
@@ -165,8 +165,20 @@ return function render() {
 `;
 
 exports[`compiler: codegen module mode preamble 1`] = `
+"import { createVNode as _createVNode, resolveDirective as _resolveDirective } from \\"vue\\"
+
+export function render() {
+  const _ctx = this
+  return null
+}"
+`;
+
+exports[`compiler: codegen module mode preamble w/ optimizeBindings: true 1`] = `
 "import { createVNode, resolveDirective } from \\"vue\\"
 
+// Binding optimization for webpack code-split
+const _createVNode = createVNode, _resolveDirective = resolveDirective
+
 export function render() {
   const _ctx = this
   return null

packages/compiler-core/__tests__/__snapshots__/compile.spec.ts.snap

@@ -26,21 +26,21 @@ return function render() {
 `;
 
 exports[`compiler: integration tests function mode w/ prefixIdentifiers: true 1`] = `
-"const { toDisplayString, createVNode, openBlock, createBlock, createCommentVNode, Fragment, renderList, createTextVNode } = Vue
+"const { toDisplayString: _toDisplayString, createVNode: _createVNode, openBlock: _openBlock, createBlock: _createBlock, createCommentVNode: _createCommentVNode, Fragment: _Fragment, renderList: _renderList, createTextVNode: _createTextVNode } = Vue
 
 return function render() {
   const _ctx = this
-  return (openBlock(), createBlock(\\"div\\", {
+  return (_openBlock(), _createBlock(\\"div\\", {
     id: \\"foo\\",
     class: _ctx.bar.baz
   }, [
-    createTextVNode(toDisplayString(_ctx.world.burn()) + \\" \\", 1 /* TEXT */),
-    (openBlock(), (_ctx.ok)
-      ? createBlock(\\"div\\", { key: 0 }, \\"yes\\")
-      : createBlock(Fragment, { key: 1 }, [\\"no\\"])),
-    (openBlock(false), createBlock(Fragment, null, renderList(_ctx.list, (value, index) => {
-      return (openBlock(), createBlock(\\"div\\", null, [
-        createVNode(\\"span\\", null, toDisplayString(value + index), 1 /* TEXT */)
+    _createTextVNode(_toDisplayString(_ctx.world.burn()) + \\" \\", 1 /* TEXT */),
+    (_openBlock(), (_ctx.ok)
+      ? _createBlock(\\"div\\", { key: 0 }, \\"yes\\")
+      : _createBlock(_Fragment, { key: 1 }, [\\"no\\"])),
+    (_openBlock(false), _createBlock(_Fragment, null, _renderList(_ctx.list, (value, index) => {
+      return (_openBlock(), _createBlock(\\"div\\", null, [
+        _createVNode(\\"span\\", null, _toDisplayString(value + index), 1 /* TEXT */)
       ]))
     }), 256 /* UNKEYED_FRAGMENT */))
   ], 2 /* CLASS */))
@@ -48,21 +48,21 @@ return function render() {
 `;
 
 exports[`compiler: integration tests module mode 1`] = `
-"import { toDisplayString, createVNode, openBlock, createBlock, createCommentVNode, Fragment, renderList, createTextVNode } from \\"vue\\"
+"import { toDisplayString as _toDisplayString, createVNode as _createVNode, openBlock as _openBlock, createBlock as _createBlock, createCommentVNode as _createCommentVNode, Fragment as _Fragment, renderList as _renderList, createTextVNode as _createTextVNode } from \\"vue\\"
 
 export function render() {
   const _ctx = this
-  return (openBlock(), createBlock(\\"div\\", {
+  return (_openBlock(), _createBlock(\\"div\\", {
     id: \\"foo\\",
     class: _ctx.bar.baz
   }, [
-    createTextVNode(toDisplayString(_ctx.world.burn()) + \\" \\", 1 /* TEXT */),
-    (openBlock(), (_ctx.ok)
-      ? createBlock(\\"div\\", { key: 0 }, \\"yes\\")
-      : createBlock(Fragment, { key: 1 }, [\\"no\\"])),
-    (openBlock(false), createBlock(Fragment, null, renderList(_ctx.list, (value, index) => {
-      return (openBlock(), createBlock(\\"div\\", null, [
-        createVNode(\\"span\\", null, toDisplayString(value + index), 1 /* TEXT */)
+    _createTextVNode(_toDisplayString(_ctx.world.burn()) + \\" \\", 1 /* TEXT */),
+    (_openBlock(), (_ctx.ok)
+      ? _createBlock(\\"div\\", { key: 0 }, \\"yes\\")
+      : _createBlock(_Fragment, { key: 1 }, [\\"no\\"])),
+    (_openBlock(false), _createBlock(_Fragment, null, _renderList(_ctx.list, (value, index) => {
+      return (_openBlock(), _createBlock(\\"div\\", null, [
+        _createVNode(\\"span\\", null, _toDisplayString(value + index), 1 /* TEXT */)
       ]))
     }), 256 /* UNKEYED_FRAGMENT */))
   ], 2 /* CLASS */))

packages/compiler-core/__tests__/__snapshots__/scopeId.spec.ts.snap

@@ -1,17 +1,17 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`scopeId compiler support should push scopeId for hoisted nodes 1`] = `
-"import { createVNode, createBlock, openBlock, withScopeId, pushScopeId, popScopeId } from \\"vue\\"
-const withId = withScopeId(\\"test\\")
+"import { createVNode as _createVNode, createBlock as _createBlock, openBlock as _openBlock, withScopeId as _withScopeId, pushScopeId as _pushScopeId, popScopeId as _popScopeId } from \\"vue\\"
+const _withId = _withScopeId(\\"test\\")
 
-pushScopeId(\\"test\\")
-const _hoisted_1 = createVNode(\\"div\\", null, \\"hello\\")
-const _hoisted_2 = createVNode(\\"div\\", null, \\"world\\")
-popScopeId()
+_pushScopeId(\\"test\\")
+const _hoisted_1 = _createVNode(\\"div\\", null, \\"hello\\")
+const _hoisted_2 = _createVNode(\\"div\\", null, \\"world\\")
+_popScopeId()
 
-export const render = withId(function render() {
+export const render = _withId(function render() {
   const _ctx = this
-  return (openBlock(), createBlock(\\"div\\", null, [
+  return (_openBlock(), _createBlock(\\"div\\", null, [
     _hoisted_1,
     _hoisted_2
   ]))
@@ -19,16 +19,16 @@ export const render = withId(function render() {
 `;
 
 exports[`scopeId compiler support should wrap default slot 1`] = `
-"import { createVNode, resolveComponent, createBlock, openBlock, withScopeId } from \\"vue\\"
-const withId = withScopeId(\\"test\\")
+"import { createVNode as _createVNode, resolveComponent as _resolveComponent, createBlock as _createBlock, openBlock as _openBlock, withScopeId as _withScopeId } from \\"vue\\"
+const _withId = _withScopeId(\\"test\\")
 
-export const render = withId(function render() {
+export const render = _withId(function render() {
   const _ctx = this
-  const _component_Child = resolveComponent(\\"Child\\")
+  const _component_Child = _resolveComponent(\\"Child\\")
 
-  return (openBlock(), createBlock(_component_Child, null, {
-    default: withId(() => [
-      createVNode(\\"div\\")
+  return (_openBlock(), _createBlock(_component_Child, null, {
+    default: _withId(() => [
+      _createVNode(\\"div\\")
     ]),
     _compiled: true
   }))
@@ -36,27 +36,27 @@ export const render = withId(function render() {
 `;
 
 exports[`scopeId compiler support should wrap dynamic slots 1`] = `
-"import { createVNode, resolveComponent, renderList, createSlots, createBlock, openBlock, withScopeId } from \\"vue\\"
-const withId = withScopeId(\\"test\\")
+"import { createVNode as _createVNode, resolveComponent as _resolveComponent, renderList as _renderList, createSlots as _createSlots, createBlock as _createBlock, openBlock as _openBlock, withScopeId as _withScopeId } from \\"vue\\"
+const _withId = _withScopeId(\\"test\\")
 
-export const render = withId(function render() {
+export const render = _withId(function render() {
   const _ctx = this
-  const _component_Child = resolveComponent(\\"Child\\")
+  const _component_Child = _resolveComponent(\\"Child\\")
 
-  return (openBlock(), createBlock(_component_Child, null, createSlots({ _compiled: true }, [
+  return (_openBlock(), _createBlock(_component_Child, null, _createSlots({ _compiled: true }, [
     (_ctx.ok)
       ? {
           name: \\"foo\\",
-          fn: withId(() => [
-            createVNode(\\"div\\")
+          fn: _withId(() => [
+            _createVNode(\\"div\\")
           ])
         }
       : undefined,
-    renderList(_ctx.list, (i) => {
+    _renderList(_ctx.list, (i) => {
       return {
         name: i,
-        fn: withId(() => [
-          createVNode(\\"div\\")
+        fn: _withId(() => [
+          _createVNode(\\"div\\")
         ])
       }
     })
@@ -65,19 +65,19 @@ export const render = withId(function render() {
 `;
 
 exports[`scopeId compiler support should wrap named slots 1`] = `
-"import { toDisplayString, createTextVNode, createVNode, resolveComponent, createBlock, openBlock, withScopeId } from \\"vue\\"
-const withId = withScopeId(\\"test\\")
+"import { toDisplayString as _toDisplayString, createTextVNode as _createTextVNode, createVNode as _createVNode, resolveComponent as _resolveComponent, createBlock as _createBlock, openBlock as _openBlock, withScopeId as _withScopeId } from \\"vue\\"
+const _withId = _withScopeId(\\"test\\")
 
-export const render = withId(function render() {
+export const render = _withId(function render() {
   const _ctx = this
-  const _component_Child = resolveComponent(\\"Child\\")
+  const _component_Child = _resolveComponent(\\"Child\\")
 
-  return (openBlock(), createBlock(_component_Child, null, {
-    foo: withId(({ msg }) => [
-      createTextVNode(toDisplayString(msg), 1 /* TEXT */)
+  return (_openBlock(), _createBlock(_component_Child, null, {
+    foo: _withId(({ msg }) => [
+      _createTextVNode(_toDisplayString(msg), 1 /* TEXT */)
     ]),
-    bar: withId(() => [
-      createVNode(\\"div\\")
+    bar: _withId(() => [
+      _createVNode(\\"div\\")
     ]),
     _compiled: true
   }))
@@ -85,11 +85,11 @@ export const render = withId(function render() {
 `;
 
 exports[`scopeId compiler support should wrap render function 1`] = `
-"import { createVNode, createBlock, openBlock, withScopeId } from \\"vue\\"
-const withId = withScopeId(\\"test\\")
+"import { createVNode as _createVNode, createBlock as _createBlock, openBlock as _openBlock, withScopeId as _withScopeId } from \\"vue\\"
+const _withId = _withScopeId(\\"test\\")
 
-export const render = withId(function render() {
+export const render = _withId(function render() {
   const _ctx = this
-  return (openBlock(), createBlock(\\"div\\"))
+  return (_openBlock(), _createBlock(\\"div\\"))
 })"
 `;

packages/compiler-core/__tests__/codegen.spec.ts

@@ -54,11 +54,33 @@ describe('compiler: codegen', () => {
       helpers: [CREATE_VNODE, RESOLVE_DIRECTIVE]
     })
     const { code } = generate(root, { mode: 'module' })
+    expect(code).toMatch(
+      `import { ${helperNameMap[CREATE_VNODE]} as _${
+        helperNameMap[CREATE_VNODE]
+      }, ${helperNameMap[RESOLVE_DIRECTIVE]} as _${
+        helperNameMap[RESOLVE_DIRECTIVE]
+      } } from "vue"`
+    )
+    expect(code).toMatchSnapshot()
+  })
+
+  test('module mode preamble w/ optimizeBindings: true', () => {
+    const root = createRoot({
+      helpers: [CREATE_VNODE, RESOLVE_DIRECTIVE]
+    })
+    const { code } = generate(root, { mode: 'module', optimizeBindings: true })
     expect(code).toMatch(
       `import { ${helperNameMap[CREATE_VNODE]}, ${
         helperNameMap[RESOLVE_DIRECTIVE]
       } } from "vue"`
     )
+    expect(code).toMatch(
+      `const _${helperNameMap[CREATE_VNODE]} = ${
+        helperNameMap[CREATE_VNODE]
+      }, _${helperNameMap[RESOLVE_DIRECTIVE]} = ${
+        helperNameMap[RESOLVE_DIRECTIVE]
+      }`
+    )
     expect(code).toMatchSnapshot()
   })
 
@@ -88,7 +110,9 @@ describe('compiler: codegen', () => {
     })
     expect(code).not.toMatch(`const _Vue = Vue`)
     expect(code).toMatch(
-      `const { ${helperNameMap[CREATE_VNODE]}, ${
+      `const { ${helperNameMap[CREATE_VNODE]}: _${
+        helperNameMap[CREATE_VNODE]
+      }, ${helperNameMap[RESOLVE_DIRECTIVE]}: _${
         helperNameMap[RESOLVE_DIRECTIVE]
       } } = Vue`
     )
@@ -415,9 +439,9 @@ describe('compiler: codegen', () => {
     expect(code).toMatch(
       `
   _cache[1] || (
-    setBlockTracking(-1),
+    _setBlockTracking(-1),
     _cache[1] = foo,
-    setBlockTracking(1),
+    _setBlockTracking(1),
     _cache[1]
   )
     `.trim()

packages/compiler-core/__tests__/scopeId.spec.ts

@@ -18,8 +18,8 @@ describe('scopeId compiler support', () => {
       scopeId: 'test'
     })
     expect(ast.helpers).toContain(WITH_SCOPE_ID)
-    expect(code).toMatch(`const withId = withScopeId("test")`)
-    expect(code).toMatch(`export const render = withId(function render() {`)
+    expect(code).toMatch(`const _withId = _withScopeId("test")`)
+    expect(code).toMatch(`export const render = _withId(function render() {`)
     expect(code).toMatchSnapshot()
   })
 
@@ -28,7 +28,7 @@ describe('scopeId compiler support', () => {
       mode: 'module',
       scopeId: 'test'
     })
-    expect(code).toMatch(`default: withId(() => [`)
+    expect(code).toMatch(`default: _withId(() => [`)
     expect(code).toMatchSnapshot()
   })
 
@@ -44,8 +44,8 @@ describe('scopeId compiler support', () => {
         scopeId: 'test'
       }
     )
-    expect(code).toMatch(`foo: withId(({ msg }) => [`)
-    expect(code).toMatch(`bar: withId(() => [`)
+    expect(code).toMatch(`foo: _withId(({ msg }) => [`)
+    expect(code).toMatch(`bar: _withId(() => [`)
     expect(code).toMatchSnapshot()
   })
 
@@ -61,8 +61,8 @@ describe('scopeId compiler support', () => {
         scopeId: 'test'
       }
     )
-    expect(code).toMatch(/name: "foo",\s+fn: withId\(/)
-    expect(code).toMatch(/name: i,\s+fn: withId\(/)
+    expect(code).toMatch(/name: "foo",\s+fn: _withId\(/)
+    expect(code).toMatch(/name: i,\s+fn: _withId\(/)
     expect(code).toMatchSnapshot()
   })
 
@@ -80,10 +80,10 @@ describe('scopeId compiler support', () => {
     expect(ast.hoists.length).toBe(2)
     expect(code).toMatch(
       [
-        `pushScopeId("test")`,
-        `const _hoisted_1 = createVNode("div", null, "hello")`,
-        `const _hoisted_2 = createVNode("div", null, "world")`,
-        `popScopeId()`
+        `_pushScopeId("test")`,
+        `const _hoisted_1 = _createVNode("div", null, "hello")`,
+        `const _hoisted_2 = _createVNode("div", null, "world")`,
+        `_popScopeId()`
       ].join('\n')
     )
     expect(code).toMatchSnapshot()

packages/compiler-core/__tests__/transforms/__snapshots__/hoistStatic.spec.ts.snap

@@ -208,14 +208,14 @@ return function render() {
 `;
 
 exports[`compiler: hoistStatic transform prefixIdentifiers should NOT hoist elements with cached handlers 1`] = `
-"import { createVNode, createBlock, openBlock } from \\"vue\\"
+"import { createVNode as _createVNode, createBlock as _createBlock, openBlock as _openBlock } from \\"vue\\"
 
 export function render() {
   const _ctx = this
   const _cache = _ctx.$cache
-  return (openBlock(), createBlock(\\"div\\", null, [
-    createVNode(\\"div\\", null, [
-      createVNode(\\"div\\", {
+  return (_openBlock(), _createBlock(\\"div\\", null, [
+    _createVNode(\\"div\\", null, [
+      _createVNode(\\"div\\", {
         onClick: _cache[1] || (_cache[1] = $event => (_ctx.foo($event)))
       })
     ])

packages/compiler-core/__tests__/transforms/__snapshots__/transformText.spec.ts.snap

@@ -91,10 +91,10 @@ return function render() {
 `;
 
 exports[`compiler: transform text with prefixIdentifiers: true 1`] = `
-"const { toDisplayString } = Vue
+"const { toDisplayString: _toDisplayString } = Vue
 
 return function render() {
   const _ctx = this
-  return toDisplayString(_ctx.foo) + \\" bar \\" + toDisplayString(_ctx.baz + _ctx.qux)
+  return _toDisplayString(_ctx.foo) + \\" bar \\" + _toDisplayString(_ctx.baz + _ctx.qux)
 }"
 `;

packages/compiler-core/__tests__/transforms/__snapshots__/vModel.spec.ts.snap

@@ -1,11 +1,11 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`compiler: transform v-model compound expression (with prefixIdentifiers) 1`] = `
-"import { createVNode, createBlock, openBlock } from \\"vue\\"
+"import { createVNode as _createVNode, createBlock as _createBlock, openBlock as _openBlock } from \\"vue\\"
 
 export function render() {
   const _ctx = this
-  return (openBlock(), createBlock(\\"input\\", {
+  return (_openBlock(), _createBlock(\\"input\\", {
     modelValue: _ctx.model[_ctx.index],
     \\"onUpdate:modelValue\\": $event => (_ctx.model[_ctx.index] = $event)
   }, null, 8 /* PROPS */, [\\"modelValue\\", \\"onUpdate:modelValue\\"]))
@@ -28,11 +28,11 @@ return function render() {
 `;
 
 exports[`compiler: transform v-model simple exprssion (with prefixIdentifiers) 1`] = `
-"import { createVNode, createBlock, openBlock } from \\"vue\\"
+"import { createVNode as _createVNode, createBlock as _createBlock, openBlock as _openBlock } from \\"vue\\"
 
 export function render() {
   const _ctx = this
-  return (openBlock(), createBlock(\\"input\\", {
+  return (_openBlock(), _createBlock(\\"input\\", {
     modelValue: _ctx.model,
     \\"onUpdate:modelValue\\": $event => (_ctx.model = $event)
   }, null, 8 /* PROPS */, [\\"modelValue\\", \\"onUpdate:modelValue\\"]))
@@ -70,11 +70,11 @@ return function render() {
 `;
 
 exports[`compiler: transform v-model with dynamic argument (with prefixIdentifiers) 1`] = `
-"import { createVNode, createBlock, openBlock } from \\"vue\\"
+"import { createVNode as _createVNode, createBlock as _createBlock, openBlock as _openBlock } from \\"vue\\"
 
 export function render() {
   const _ctx = this
-  return (openBlock(), createBlock(\\"input\\", {
+  return (_openBlock(), _createBlock(\\"input\\", {
     [_ctx.value]: _ctx.model,
     [\\"onUpdate:\\" + _ctx.value]: $event => (_ctx.model = $event)
   }, null, 16 /* FULL_PROPS */))

packages/compiler-core/__tests__/transforms/__snapshots__/vSlot.spec.ts.snap

@@ -1,30 +1,30 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
 exports[`compiler: transform component slots dynamically named slots 1`] = `
-"const { toDisplayString, resolveComponent, createVNode, createBlock, openBlock } = Vue
+"const { toDisplayString: _toDisplayString, resolveComponent: _resolveComponent, createVNode: _createVNode, createBlock: _createBlock, openBlock: _openBlock } = Vue
 
 return function render() {
   const _ctx = this
-  const _component_Comp = resolveComponent(\\"Comp\\")
+  const _component_Comp = _resolveComponent(\\"Comp\\")
 
-  return (openBlock(), createBlock(_component_Comp, null, {
-    [_ctx.one]: ({ foo }) => [toDisplayString(foo), toDisplayString(_ctx.bar)],
-    [_ctx.two]: ({ bar }) => [toDisplayString(_ctx.foo), toDisplayString(bar)],
+  return (_openBlock(), _createBlock(_component_Comp, null, {
+    [_ctx.one]: ({ foo }) => [_toDisplayString(foo), _toDisplayString(_ctx.bar)],
+    [_ctx.two]: ({ bar }) => [_toDisplayString(_ctx.foo), _toDisplayString(bar)],
     _compiled: true
   }, 512 /* DYNAMIC_SLOTS */))
 }"
 `;
 
 exports[`compiler: transform component slots implicit default slot 1`] = `
-"const { createVNode, resolveComponent, createBlock, openBlock } = Vue
+"const { createVNode: _createVNode, resolveComponent: _resolveComponent, createBlock: _createBlock, openBlock: _openBlock } = Vue
 
 return function render() {
   const _ctx = this
-  const _component_Comp = resolveComponent(\\"Comp\\")
+  const _component_Comp = _resolveComponent(\\"Comp\\")
 
-  return (openBlock(), createBlock(_component_Comp, null, {
+  return (_openBlock(), _createBlock(_component_Comp, null, {
     default: () => [
-      createVNode(\\"div\\")
+      _createVNode(\\"div\\")
     ],
     _compiled: true
   }))
@@ -32,17 +32,17 @@ return function render() {
 `;
 
 exports[`compiler: transform component slots named slot with v-for w/ prefixIdentifiers: true 1`] = `
-"const { toDisplayString, resolveComponent, renderList, createSlots, createVNode, createBlock, openBlock } = Vue
+"const { toDisplayString: _toDisplayString, resolveComponent: _resolveComponent, renderList: _renderList, createSlots: _createSlots, createVNode: _createVNode, createBlock: _createBlock, openBlock: _openBlock } = Vue
 
 return function render() {
   const _ctx = this
-  const _component_Comp = resolveComponent(\\"Comp\\")
+  const _component_Comp = _resolveComponent(\\"Comp\\")
 
-  return (openBlock(), createBlock(_component_Comp, null, createSlots({ _compiled: true }, [
-    renderList(_ctx.list, (name) => {
+  return (_openBlock(), _createBlock(_component_Comp, null, _createSlots({ _compiled: true }, [
+    _renderList(_ctx.list, (name) => {
       return {
         name: name,
-        fn: () => [toDisplayString(name)]
+        fn: () => [_toDisplayString(name)]
       }
     })
   ]), 512 /* DYNAMIC_SLOTS */))
@@ -50,17 +50,17 @@ return function render() {
 `;
 
 exports[`compiler: transform component slots named slot with v-if + prefixIdentifiers: true 1`] = `
-"const { toDisplayString, resolveComponent, createSlots, createVNode, createBlock, openBlock } = Vue
+"const { toDisplayString: _toDisplayString, resolveComponent: _resolveComponent, createSlots: _createSlots, createVNode: _createVNode, createBlock: _createBlock, openBlock: _openBlock } = Vue
 
 return function render() {
   const _ctx = this
-  const _component_Comp = resolveComponent(\\"Comp\\")
+  const _component_Comp = _resolveComponent(\\"Comp\\")
 
-  return (openBlock(), createBlock(_component_Comp, null, createSlots({ _compiled: true }, [
+  return (_openBlock(), _createBlock(_component_Comp, null, _createSlots({ _compiled: true }, [
     (_ctx.ok)
       ? {
           name: \\"one\\",
-          fn: (props) => [toDisplayString(props)]
+          fn: (props) => [_toDisplayString(props)]
         }
       : undefined
   ]), 512 /* DYNAMIC_SLOTS */))
@@ -118,15 +118,15 @@ return function render() {
 `;
 
 exports[`compiler: transform component slots named slots 1`] = `
-"const { toDisplayString, resolveComponent, createVNode, createBlock, openBlock } = Vue
+"const { toDisplayString: _toDisplayString, resolveComponent: _resolveComponent, createVNode: _createVNode, createBlock: _createBlock, openBlock: _openBlock } = Vue
 
 return function render() {
   const _ctx = this
-  const _component_Comp = resolveComponent(\\"Comp\\")
+  const _component_Comp = _resolveComponent(\\"Comp\\")
 
-  return (openBlock(), createBlock(_component_Comp, null, {
-    one: ({ foo }) => [toDisplayString(foo), toDisplayString(_ctx.bar)],
-    two: ({ bar }) => [toDisplayString(_ctx.foo), toDisplayString(bar)],
+  return (_openBlock(), _createBlock(_component_Comp, null, {
+    one: ({ foo }) => [_toDisplayString(foo), _toDisplayString(_ctx.bar)],
+    two: ({ bar }) => [_toDisplayString(_ctx.foo), _toDisplayString(bar)],
     _compiled: true
   }))
 }"
@@ -154,23 +154,23 @@ return function render() {
 `;
 
 exports[`compiler: transform component slots nested slots scoping 1`] = `
-"const { toDisplayString, resolveComponent, createVNode, createBlock, openBlock } = Vue
+"const { toDisplayString: _toDisplayString, resolveComponent: _resolveComponent, createVNode: _createVNode, createBlock: _createBlock, openBlock: _openBlock } = Vue
 
 return function render() {
   const _ctx = this
-  const _component_Inner = resolveComponent(\\"Inner\\")
-  const _component_Comp = resolveComponent(\\"Comp\\")
+  const _component_Inner = _resolveComponent(\\"Inner\\")
+  const _component_Comp = _resolveComponent(\\"Comp\\")
 
-  return (openBlock(), createBlock(_component_Comp, null, {
+  return (_openBlock(), _createBlock(_component_Comp, null, {
     default: ({ foo }) => [
-      createVNode(_component_Inner, null, {
-        default: ({ bar }) => [toDisplayString(foo), toDisplayString(bar), toDisplayString(_ctx.baz)],
+      _createVNode(_component_Inner, null, {
+        default: ({ bar }) => [_toDisplayString(foo), _toDisplayString(bar), _toDisplayString(_ctx.baz)],
         _compiled: true
       }, 512 /* DYNAMIC_SLOTS */),
       \\" \\",
-      toDisplayString(foo),
-      toDisplayString(_ctx.bar),
-      toDisplayString(_ctx.baz)
+      _toDisplayString(foo),
+      _toDisplayString(_ctx.bar),
+      _toDisplayString(_ctx.baz)
     ],
     _compiled: true
   }))
@@ -178,14 +178,14 @@ return function render() {
 `;
 
 exports[`compiler: transform component slots on-component default slot 1`] = `
-"const { toDisplayString, resolveComponent, createVNode, createBlock, openBlock } = Vue
+"const { toDisplayString: _toDisplayString, resolveComponent: _resolveComponent, createVNode: _createVNode, createBlock: _createBlock, openBlock: _openBlock } = Vue
 
 return function render() {
   const _ctx = this
-  const _component_Comp = resolveComponent(\\"Comp\\")
+  const _component_Comp = _resolveComponent(\\"Comp\\")
 
-  return (openBlock(), createBlock(_component_Comp, null, {
-    default: ({ foo }) => [toDisplayString(foo), toDisplayString(_ctx.bar)],
+  return (_openBlock(), _createBlock(_component_Comp, null, {
+    default: ({ foo }) => [_toDisplayString(foo), _toDisplayString(_ctx.bar)],
     _compiled: true
   }))
 }"

packages/compiler-core/src/codegen.ts

@@ -196,7 +196,7 @@ export function generate(
 
   // enter render function
   if (genScopeId && !ssr) {
-    push(`const render = withId(`)
+    push(`const render = _withId(`)
   }
   if (!ssr) {
     push(`function render() {`)
@@ -395,7 +395,7 @@ function genModulePreamble(
   }
 
   if (genScopeId) {
-    push(`const withId = ${helper(WITH_SCOPE_ID)}("${scopeId}")`)
+    push(`const _withId = ${helper(WITH_SCOPE_ID)}("${scopeId}")`)
     newline()
   }
 
@@ -719,7 +719,7 @@ function genFunctionExpression(
     !__BROWSER__ && isSlot && scopeId != null && mode !== 'function'
 
   if (genScopeId) {
-    push(`withId(`)
+    push(`_withId(`)
   }
   push(`(`, node)
   if (isArray(params)) {