transition-util.ts — vue Source File

Source Code

import { inBrowser, isIE9 } from 'core/util/index'
import { addClass, removeClass } from 'web/runtime/class-util'
import { remove, extend, cached } from 'shared/util'

export function resolveTransition(
  def?: string | Record<string, any>
): Record<string, any> | undefined {
  if (!def) {
    return
  }
  /* istanbul ignore else */
  if (typeof def === 'object') {
    const res = {}
    if (def.css !== false) {
      extend(res, autoCssTransition(def.name || 'v'))
    }
    extend(res, def)
    return res
  } else if (typeof def === 'string') {
    return autoCssTransition(def)
  }
}

const autoCssTransition: (name: string) => Object = cached(name => {
  return {
    enterClass: `${name}-enter`,
    enterToClass: `${name}-enter-to`,
    enterActiveClass: `${name}-enter-active`,
    leaveClass: `${name}-leave`,
    leaveToClass: `${name}-leave-to`,
    leaveActiveClass: `${name}-leave-active`
  }
})

export const hasTransition = inBrowser && !isIE9
const TRANSITION = 'transition'
const ANIMATION = 'animation'

// Transition property/event sniffing
export let transitionProp = 'transition'
export let transitionEndEvent = 'transitionend'
export let animationProp = 'animation'
export let animationEndEvent = 'animationend'
if (hasTransition) {
  /* istanbul ignore if */
  if (
    window.ontransitionend === undefined &&
    window.onwebkittransitionend !== undefined
  ) {
    transitionProp = 'WebkitTransition'
    transitionEndEvent = 'webkitTransitionEnd'
  }
  if (
    window.onanimationend === undefined &&
    window.onwebkitanimationend !== undefined
  ) {
    animationProp = 'WebkitAnimation'
    animationEndEvent = 'webkitAnimationEnd'
  }
}
// ... (156 more lines)