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vShow.spec.ts
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vShow.spec.ts
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import {
type VNode,
defineComponent,
h,
nextTick,
ref,
watch,
withDirectives,
} from '@vue/runtime-core'
import { Transition, render, vShow } from '@vue/runtime-dom'
const withVShow = (node: VNode, exp: any) =>
withDirectives(node, [[vShow, exp]])
let root: any
beforeEach(() => {
root = document.createElement('div')
})
describe('runtime-dom: v-show directive', () => {
test('should check show value is truthy', async () => {
const component = defineComponent({
data() {
return { value: true }
},
render() {
return [withVShow(h('div'), this.value)]
},
})
render(h(component), root)
const $div = root.children[0]
expect($div.style.display).toEqual('')
})
test('should check show value is falsy', async () => {
const component = defineComponent({
data() {
return { value: false }
},
render() {
return [withVShow(h('div'), this.value)]
},
})
render(h(component), root)
const $div = root.children[0]
expect($div.style.display).toEqual('none')
})
it('should update show value changed', async () => {
const component = defineComponent({
data() {
return { value: true }
},
render() {
return [withVShow(h('div'), this.value)]
},
})
render(h(component), root)
const $div = root.children[0]
const data = root._vnode.component.data
expect($div.style.display).toEqual('')
data.value = false
await nextTick()
expect($div.style.display).toEqual('none')
data.value = {}
await nextTick()
expect($div.style.display).toEqual('')
data.value = 0
await nextTick()
expect($div.style.display).toEqual('none')
data.value = []
await nextTick()
expect($div.style.display).toEqual('')
data.value = null
await nextTick()
expect($div.style.display).toEqual('none')
data.value = '0'
await nextTick()
expect($div.style.display).toEqual('')
data.value = undefined
await nextTick()
expect($div.style.display).toEqual('none')
data.value = 1
await nextTick()
expect($div.style.display).toEqual('')
})
test('should respect display value in style attribute', async () => {
const component = defineComponent({
data() {
return { value: true }
},
render() {
return [
withVShow(h('div', { style: { display: 'block' } }), this.value),
]
},
})
render(h(component), root)
const $div = root.children[0]
const data = root._vnode.component.data
expect($div.style.display).toEqual('block')
data.value = false
await nextTick()
expect($div.style.display).toEqual('none')
data.value = true
await nextTick()
expect($div.style.display).toEqual('block')
})
// #2583
test('the value of `display` set by v-show should not be overwritten by the style attribute when updated', async () => {
const style = ref('width: 100px')
const display = ref(false)
const component = defineComponent({
render() {
return withVShow(h('div', { style: style.value }), display.value)
},
})
render(h(component), root)
const $div = root.children[0]
expect($div.style.display).toEqual('none')
style.value = 'width: 50px'
await nextTick()
expect($div.style.display).toEqual('none')
display.value = true
await nextTick()
expect($div.style.display).toEqual('')
})
test('the value of `display` set by v-show should not be overwritten by the style attribute when updated (object value)', async () => {
const style = ref({
display: 'block',
width: '100px',
})
const display = ref(false)
const component = defineComponent({
render() {
return withVShow(h('div', { style: style.value }), display.value)
},
})
render(h(component), root)
const $div = root.children[0]
expect($div.style.display).toEqual('none')
style.value.width = '50px'
await nextTick()
expect($div.style.display).toEqual('none')
display.value = true
await nextTick()
expect($div.style.display).toEqual('block')
})
// #2583, #2757
test('the value of `display` set by v-show should not be overwritten by the style attribute when updated (with Transition)', async () => {
const style = ref('width: 100px')
const display = ref(false)
const component = defineComponent({
setup() {
const innerValue = ref(false)
watch(display, val => {
innerValue.value = val
})
return () => {
return h(Transition, () =>
withVShow(
h('div', { style: style.value }, innerValue.value),
display.value,
),
)
}
},
})
render(h(component), root)
const $div = root.children[0]
expect($div.style.display).toEqual('none')
style.value = 'width: 50px'
await nextTick()
expect($div.style.display).toEqual('none')
display.value = true
await nextTick()
expect($div.style.display).toEqual('')
})
// #10151
test('should respect the display value when v-show value is true', async () => {
const isVisible = ref(false)
const useDisplayStyle = ref(true)
const compStyle = ref({
display: 'none',
})
const withoutDisplayStyle = {
margin: '10px',
}
const Component = {
setup() {
return () => {
return withVShow(
h('div', {
style: useDisplayStyle.value
? compStyle.value
: withoutDisplayStyle,
}),
isVisible.value,
)
}
},
}
render(h(Component), root)
const $div = root.children[0]
expect($div.style.display).toEqual('none')
isVisible.value = true
await nextTick()
expect($div.style.display).toEqual('none')
compStyle.value.display = 'block'
await nextTick()
expect($div.style.display).toEqual('block')
compStyle.value.display = 'inline-block'
await nextTick()
expect($div.style.display).toEqual('inline-block')
isVisible.value = false
await nextTick()
expect($div.style.display).toEqual('none')
isVisible.value = true
await nextTick()
expect($div.style.display).toEqual('inline-block')
useDisplayStyle.value = false
await nextTick()
expect($div.style.display).toEqual('')
expect(getComputedStyle($div).display).toEqual('block')
isVisible.value = false
await nextTick()
expect($div.style.display).toEqual('none')
isVisible.value = true
await nextTick()
expect($div.style.display).toEqual('')
})
})