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feat(runtime-vapor): support setup fn and render fn co-usage for expose #14179

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feat(runtime-vapor): support setup fn and render fn co-usage for expose #14179

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1385e4a
feat(runtime-vapor): support setup fn and render fn co-usage
zhiyuanzmj Dec 8, 2025
5929f33
Update packages/runtime-vapor/src/component.ts
zhiyuanzmj Dec 8, 2025
f8be210
Update packages/runtime-vapor/src/component.ts
zhiyuanzmj Dec 8, 2025
3e6130e
chore: Merge branch 'minor' into setup-render
zhiyuanzmj Dec 8, 2025
b96b8cf
Merge branch 'minor' into setup-render
zhiyuanzmj Jan 21, 2026
30b21c6
feat: setup return as exposed
zhiyuanzmj Jan 21, 2026
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23 changes: 23 additions & 0 deletions packages/runtime-vapor/__tests__/component.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -472,6 +472,29 @@ describe('component', () => {
__DEV__ = true
})

test('setup and render co-usage in production mode', () => {
__DEV__ = false
const { component: Child } = define({
setup: () => ({ foo: 'foo' }),
render() {
return template('<div> HI </div>', true)()
},
})

let exposed: Record<string, any> | null = {}
const { host } = define({
setup() {
let child = createComponent(Child, null, null, true)
exposed = child.exposed
return child
},
}).render()

expect(exposed.foo).toBe('foo')
expect(host.innerHTML).toBe('<div> HI </div>')
__DEV__ = true
})

it('warn if functional vapor component not return a block', () => {
// @ts-expect-error
define(() => {
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29 changes: 21 additions & 8 deletions packages/runtime-vapor/src/component.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1025,21 +1025,34 @@ function handleSetupResult(
if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
instance.devtoolsRawSetupState = setupResult
}
instance.exposed || instance.expose(setupResult)
instance.setupState = proxyRefs(setupResult)
if (__DEV__) {
instance.setupState = createDevSetupStateProxy(instance)
}
devRender(instance)
}
} else {
// component has a render function but no setup function
// (typically components with only a template and no state)
if (setupResult === EMPTY_OBJ && component.render) {
instance.block = callWithErrorHandling(
component.render,
instance,
ErrorCodes.RENDER_FUNCTION,
)
// component has a render function with either:
// - no setup function (components with only a template)
// - setup returning non-block state for use in render
// support setup fn and render fn co-usage for expose
if (!isBlock(setupResult) && component.render) {
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Copilot AI Dec 8, 2025

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Missing devtoolsRawSetupState assignment for production devtools support.

The dev-only path at lines 965-966 sets instance.devtoolsRawSetupState when __DEV__ || __FEATURE_PROD_DEVTOOLS__ is true. This production code path should have the same assignment to ensure devtools work correctly in production builds with devtools enabled.

Suggestion: Add before line 979:

if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
  instance.devtoolsRawSetupState = setupResult
}
Suggested change
if (!isBlock(setupResult) && component.render) {
if (!isBlock(setupResult) && component.render) {
if (__DEV__ || __FEATURE_PROD_DEVTOOLS__) {
instance.devtoolsRawSetupState = setupResult
}

Copilot uses AI. Check for mistakes.
instance.exposed || instance.expose(setupResult)
instance.setupState = proxyRefs(setupResult)
instance.block =
callWithErrorHandling(
component.render,
instance,
ErrorCodes.RENDER_FUNCTION,
[
instance.setupState,
instance.props,
instance.emit,
instance.attrs,
instance.slots,
],
) || []
Comment on lines 1040 to 1055
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Copilot AI Dec 8, 2025

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Missing test coverage for the new setup + render co-usage functionality in production mode.

While there's an existing test at line 420 in component.spec.ts that tests setup + render together, it only verifies dev warnings for non-existent property access. The new production code path (lines 978-992) lacks test coverage for:

  1. Verifying that setupState properties (especially refs) are properly accessible and unwrapped in the render function in production mode
  2. Testing that the render function receives the correct parameters in the expected order
  3. Ensuring devtools integration works correctly with devtoolsRawSetupState

Consider adding a test that:

  • Sets __DEV__ = false
  • Creates a component with both setup (returning refs/reactive state) and render functions
  • Verifies the render function can access and use the setup state correctly

Copilot uses AI. Check for mistakes.
} else {
// in prod result can only be block
instance.block = setupResult as Block
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