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fix(custom-elements): ensure props are available before initial render (fix #4716)) #4792

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fix(custom-elements): ensure props are available before initial render (fix #4716)) #4792

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10 changes: 9 additions & 1 deletion packages/runtime-dom/__tests__/customElement.spec.ts
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Expand Up @@ -191,13 +191,21 @@ describe('defineCustomElement', () => {

test('handling properties set before upgrading', () => {
const E = defineCustomElement({
props: ['foo'],
props: {
foo: String,
dataAge: Number
},
setup(props) {
expect(props.foo).toBe('hello')
expect(props.dataAge).toBe(5)
},
render() {
return `foo: ${this.foo}`
}
})
const el = document.createElement('my-el-upgrade') as any
el.foo = 'hello'
el.dataset.age = 5
container.appendChild(el)
customElements.define('my-el-upgrade', E)
expect(el.shadowRoot.innerHTML).toBe(`foo: hello`)
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6 changes: 4 additions & 2 deletions packages/runtime-dom/src/apiCustomElement.ts
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Expand Up @@ -233,7 +233,7 @@ export class VueElement extends BaseClass {
}
if (numberProps) {
this._numberProps = numberProps
this._update()
// this._update()
}

// check if there are props set pre-upgrade or connect
Expand All @@ -258,7 +258,9 @@ export class VueElement extends BaseClass {

const asyncDef = (this._def as ComponentOptions).__asyncLoader
if (asyncDef) {
asyncDef().then(resolve)
asyncDef()
.then(resolve)
.then(() => this._update())
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@LinusBorg LinusBorg Oct 13, 2021 •
edited

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This is necessary to have the asyncWrapper's props updated before it renders the nested actual component.

Without this, the async Component test case fails now.

} else {
resolve(this._def)
}
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