transition.ts — vue Source File

Source Code

// Provides transition support for a single element/component.
// supports transition mode (out-in / in-out)

import { warn } from 'core/util/index'
import { camelize, extend, isPrimitive } from 'shared/util'
import {
  mergeVNodeHook,
  isAsyncPlaceholder,
  getFirstComponentChild
} from 'core/vdom/helpers/index'
import VNode from 'core/vdom/vnode'
import type { Component } from 'types/component'

export const transitionProps = {
  name: String,
  appear: Boolean,
  css: Boolean,
  mode: String,
  type: String,
  enterClass: String,
  leaveClass: String,
  enterToClass: String,
  leaveToClass: String,
  enterActiveClass: String,
  leaveActiveClass: String,
  appearClass: String,
  appearActiveClass: String,
  appearToClass: String,
  duration: [Number, String, Object]
}

// in case the child is also an abstract component, e.g. <keep-alive>
// we want to recursively retrieve the real component to be rendered
function getRealChild(vnode?: VNode): VNode | undefined {
  const compOptions = vnode && vnode.componentOptions
  if (compOptions && compOptions.Ctor.options.abstract) {
    return getRealChild(getFirstComponentChild(compOptions.children))
  } else {
    return vnode
  }
}

export function extractTransitionData(comp: Component): Record<string, any> {
  const data = {}
  const options = comp.$options
  // props
  for (const key in options.propsData) {
    data[key] = comp[key]
  }
  // events.
  // extract listeners and pass them directly to the transition methods
  const listeners = options._parentListeners
  for (const key in listeners) {
    data[camelize(key)] = listeners[key]
  }
  return data
}

function placeholder(h: Function, rawChild: VNode): VNode | undefined {
  // @ts-expect-error
// ... (146 more lines)