ant-design-vue/components/_util/wave.jsx

import TransitionEvents from './css-animation/Event'

export default {
  name: 'Wave',
  props: ['insertExtraNode'],
  mounted () {
    this.$nextTick(() => {
      this.instance = this.bindAnimationEvent(this.$el)
    })
  },

  beforeDestroy () {
    if (this.instance) {
      this.instance.cancel()
    }
  },
  methods: {
    isNotGrey (color) {
      const match = (color || '').match(/rgba?\((\d*), (\d*), (\d*)(, [\.\d]*)?\)/)
      if (match && match[1] && match[2] && match[3]) {
        return !(match[1] === match[2] && match[2] === match[3])
      }
      return true
    },

    onClick (node) {
      if (node.className.indexOf('-leave') >= 0) {
        return
      }
      this.removeExtraStyleNode()
      const { insertExtraNode } = this.$props
      const extraNode = document.createElement('div')
      extraNode.className = 'ant-click-animating-node'
      const attributeName = insertExtraNode ? 'ant-click-animating' : 'ant-click-animating-without-extra-node'
      node.removeAttribute(attributeName)
      node.setAttribute(attributeName, 'true')
      // Get wave color from target
      const waveColor =
        getComputedStyle(node).getPropertyValue('border-top-color') || // Firefox Compatible
        getComputedStyle(node).getPropertyValue('border-color') ||
        getComputedStyle(node).getPropertyValue('background-color')
      // Not white or transparnt or grey
      if (waveColor &&
          waveColor !== '#ffffff' &&
          waveColor !== 'rgb(255, 255, 255)' &&
          this.isNotGrey(waveColor) &&
          !/rgba\(\d*, \d*, \d*, 0\)/.test(waveColor) && // any transparent rgba color
          waveColor !== 'transparent') {
        extraNode.style.borderColor = waveColor
        this.styleForPesudo = document.createElement('style')
        this.styleForPesudo.innerHTML =
          `[ant-click-animating-without-extra-node]:after { border-color: ${waveColor}; }`
        document.body.appendChild(this.styleForPesudo)
      }
      if (insertExtraNode) {
        node.appendChild(extraNode)
      }
      const transitionEnd = () => {
        node.removeAttribute(attributeName)
        this.removeExtraStyleNode()
        if (insertExtraNode) {
          node.removeChild(extraNode)
        }
        TransitionEvents.removeEndEventListener(node, transitionEnd)
      }
      TransitionEvents.addEndEventListener(node, transitionEnd)
    },

    bindAnimationEvent (node) {
      if (node.getAttribute('disabled') ||
          node.className.indexOf('disabled') >= 0) {
        return
      }
      const onClick = (e) => {
        // Fix radio button click twice
        if (e.target.tagName === 'INPUT') {
          return
        }
        setTimeout(() => this.onClick(node), 0)
      }
      node.addEventListener('click', onClick, true)
      return {
        cancel: () => {
          node.removeEventListener('click', onClick, true)
        },
      }
    },

    removeExtraStyleNode () {
      if (this.styleForPesudo && document.body.contains(this.styleForPesudo)) {
        document.body.removeChild(this.styleForPesudo)
        this.styleForPesudo = null
      }
    },
  },

  render () {
    return this.$slots.default && this.$slots.default[0]
  },
}