/
vShow.ts
65 lines (59 loc) 路 1.58 KB
/
vShow.ts
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import type { ObjectDirective } from '@vue/runtime-core'
export const vShowOriginalDisplay = Symbol('_vod')
export const vShowHidden = Symbol('_vsh')
export interface VShowElement extends HTMLElement {
// _vod = vue original display
[vShowOriginalDisplay]: string
[vShowHidden]: boolean
}
export const vShow: ObjectDirective<VShowElement> & { name?: 'show' } = {
beforeMount(el, { value }, { transition }) {
el[vShowOriginalDisplay] =
el.style.display === 'none' ? '' : el.style.display
if (transition && value) {
transition.beforeEnter(el)
} else {
setDisplay(el, value)
}
},
mounted(el, { value }, { transition }) {
if (transition && value) {
transition.enter(el)
}
},
updated(el, { value, oldValue }, { transition }) {
if (!value === !oldValue) return
if (transition) {
if (value) {
transition.beforeEnter(el)
setDisplay(el, true)
transition.enter(el)
} else {
transition.leave(el, () => {
setDisplay(el, false)
})
}
} else {
setDisplay(el, value)
}
},
beforeUnmount(el, { value }) {
setDisplay(el, value)
},
}
if (__DEV__) {
vShow.name = 'show'
}
function setDisplay(el: VShowElement, value: unknown): void {
el.style.display = value ? el[vShowOriginalDisplay] : 'none'
el[vShowHidden] = !value
}
// SSR vnode transforms, only used when user includes client-oriented render
// function in SSR
export function initVShowForSSR() {
vShow.getSSRProps = ({ value }) => {
if (!value) {
return { style: { display: 'none' } }
}
}
}