/**
   * 点击波纹效果
   *
   * @param  {[event]} e        [description]
   * @param  {[Object]} arg_opts [description]
   * @return {[bollean]}          [description]
   */
  export default function(e, arg_opts) {
    var opts = Object.assign({
      ele: e.target, // 波纹作用元素
      type: 'hit', // hit点击位置扩散center中心点扩展
      bgc: 'rgba(0, 0, 0, 0.15)' // 波纹颜色
    }, arg_opts)
    var target = opts.ele
    if (target) {
      var rect = target.getBoundingClientRect()
      var ripple = target.querySelector('.e-ripple')
      if (!ripple) {
        ripple = document.createElement('span')
        ripple.className = 'e-ripple'
        ripple.style.height = ripple.style.width = Math.max(rect.width, rect.height) + 'px'
        target.appendChild(ripple)
      } else {
        ripple.className = 'e-ripple'
      }
      switch (opts.type) {
        case 'center':
          ripple.style.top = (rect.height / 2 - ripple.offsetHeight / 2) + 'px'
          ripple.style.left = (rect.width / 2 - ripple.offsetWidth / 2) + 'px'
          break
        default:
          ripple.style.top = (e.pageY - rect.top - ripple.offsetHeight / 2 - document.body.scrollTop) + 'px'
          ripple.style.left = (e.pageX - rect.left - ripple.offsetWidth / 2 - document.body.scrollLeft) + 'px'
      }
      ripple.style.backgroundColor = opts.bgc
      ripple.className = 'e-ripple z-active'
      return false
    }
  }