Add delay function

[mizuka-wu]

change some attribute that:
data:{
delayTime:500, // 延迟输入
lastTime:0
}
methods:{
update (event) {
this.lastTime = event.timeStamp
if (!this.query) {
return this.reset()
}

  if (this.minChars && this.query.length < this.minChars) {
    return
  }


  // 添加的延时
  setTimeout(() => {
    if (this.lastTime - event.timeStamp == 0){
      this.loading = true

      this.fetch().then((response) => {
        if (this.query) {
          let data = response.body.data['docs']?response.body.data['docs']:[]
          this.counter = response.body.data.numFound?response.body.data.numFound:{}
          // data = this.prepareResponseData ? this.prepareResponseData(data) : data
          this.items = this.render(this.limit ? data.slice(0, this.limit) : data)

          this.current = -1
          this.loading = false

          if (this.selectFirst) {
            this.down()
          }
        }
      })
    }
  },this.delayTime)
},

}

and make update to update($event)

[pespantelis]

You could use the debounce package for this. Please check the #45 issue.