All files / runtime/src/directives vShow.ts

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import { ObjectDirective } from '@vue/runtime-core'
import { NSVElement } from '@nativescript-vue/runtime'

interface VShowElement extends NSVElement {
  // _vod = vue original display
  _vod: string
}

export const vShow: ObjectDirective<VShowElement> = {
  beforeMount(el, { value }, { transition }) {
    el._vod =
      el.getAttribute('visibility') === 'none'
        ? ''
        : (el.getAttribute('visibility') as string)
    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) {
    setDisplay(el, true)
  }
}

function setDisplay(el: VShowElement, value: unknown): void {
  el.setAttribute('visibility', value ? el._vod : 'collapsed')
}