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fix(v-model): keep the same behavior as v-model with undefinedvalue with 2.x #1530

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merged 2 commits into from
Jul 6, 2020
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fix(v-model): keep the same behavior as v-model with undefinedvalue with 2.x #1530

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d1a852c
fix(v-model): keep `v-model` with `undefined` insistent as 2.x
underfin Jul 6, 2020
3a09808
Update vModel.ts
yyx990803 Jul 6, 2020
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5 changes: 5 additions & 0 deletions packages/runtime-dom/__tests__/directives/vModel.spec.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -48,6 +48,7 @@ describe('vModel', () => {

const input = root.querySelector('input')!
const data = root._vnode.component.data
expect(input.value).toEqual('')

input.value = 'foo'
triggerEvent('input', input)
Expand All @@ -57,6 +58,10 @@ describe('vModel', () => {
data.value = 'bar'
await nextTick()
expect(input.value).toEqual('bar')

data.value = undefined
await nextTick()
expect(input.value).toEqual('')
})

it('should work with multiple listeners', async () => {
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4 changes: 2 additions & 2 deletions packages/runtime-dom/src/directives/vModel.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -47,7 +47,7 @@ export const vModelText: ModelDirective<
HTMLInputElement | HTMLTextAreaElement
> = {
beforeMount(el, { value, modifiers: { lazy, trim, number } }, vnode) {
el.value = value
el.value = value == null ? '' : value
el._assign = getModelAssigner(vnode)
const castToNumber = number || el.type === 'number'
addEventListener(el, lazy ? 'change' : 'input', e => {
Expand Down Expand Up @@ -85,7 +85,7 @@ export const vModelText: ModelDirective<
return
}
}
el.value = value
el.value = value == null ? '' : value
}
}

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