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fix(runtime-core): skip functional components in public $parent chain traversal

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fix #2437
This commit is contained in:
Evan You 2020-11-27 10:10:25 -05:00
parent 7cd85be2db
commit 53f4885d9e
1 changed files with 11 additions and 1 deletions
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12
packages/runtime-core/src/componentPublicInstance.ts
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@ -200,6 +200,16 @@ export type ComponentPublicInstance<
type PublicPropertiesMap = Record<string, (i: ComponentInternalInstance) => any>
/**
* #2437 In Vue 3, functional components do not have a public instance proxy but
* they exist in the internal parent chain. For code that relies on traversing
* public $parent chains, skip functional ones and go to the parent instead.
*/
const getPublicInstance = (
i: ComponentInternalInstance | null
): ComponentPublicInstance | null =>
i && (i.proxy ? i.proxy : getPublicInstance(i.parent))
const publicPropertiesMap: PublicPropertiesMap = extend(Object.create(null), {
$: i => i,
$el: i => i.vnode.el,
@ -208,7 +218,7 @@ const publicPropertiesMap: PublicPropertiesMap = extend(Object.create(null), {
$attrs: i => (__DEV__ ? shallowReadonly(i.attrs) : i.attrs),
$slots: i => (__DEV__ ? shallowReadonly(i.slots) : i.slots),
$refs: i => (__DEV__ ? shallowReadonly(i.refs) : i.refs),
$parent: i => i.parent && i.parent.proxy,
$parent: i => getPublicInstance(i.parent),
$root: i => i.root && i.root.proxy,
$emit: i => i.emit,
$options: i => (__FEATURE_OPTIONS_API__ ? resolveMergedOptions(i) : i.type),