bindEL (event, eventHandle, isBubble = false) {
    if (!this.root) {
      return
    }
    if (`on${event}` in this.root && typeof eventHandle === 'function') {
      this.root.addEventListener(event, eventHandle, isBubble)
    }
  }
@param { string } event
@param { Function } eventHandle
@param { boolean } [isBubble=false]
@returns