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created() {

   window.addEventListener('message', this.receiveMessage, false)

  },

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beforeDestroy() { // 在组件生命周期结束的时候销毁。

   window.removeEventListener('message', this.receiveMessage, false)

  },

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mounted () {

   window.addEventListener( 'scroll', this.scrollHander)

},

methods: {

   scrollHander () { ?}

}

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mounted () {

   window.addEventListener('scroll', this.scrollHander)

},

destroyed () {

   window.removeEventListener('scroll', this.scrollHander)

}

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mounted () {

   let ?_this = this

   window.addEventListener('scroll', throttle(() => {

   ?  _this.scrollHander()

   },200 ))

},

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mounted () {

   let ?_this = this

   this.throttleLoad = throttle(() =>{

   ?  _this.scrollHander()

   },200)

   window.addEventListener('scroll', this.throttleLoad)

},

destroyed () {

   window.removeEventListener('scroll',this.throttleLoad)?

},

methods: {?

   scrollHander () { }

}