vue实现百度搜索下拉提示功能

 这段代码用到vuejs和vue-resouece。实现对接智能提示接口,并通过上下键选择提示项,按enter进行搜索

DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Documenttitle>
  <script type="text/javascript" src="vue.js">script>
  <script type="text/javascript" src="vue-resource.js">script>
  <script type="text/javascript">
  window.onload = function() {
    var app = new Vue({
      el: '#box',
      data: {
        myData: [],
        tt: '',
        now: -1
      },
      methods: {
        get: function(e) {

          // 请求限制 按了上下箭头
          if (e.keyCode === 38 || e.keyCode === 40) {
            return
          }
          // enter跳转
          if (e.keyCode === 13) {
            window.open('https://www.baidu.com/s?wd=' + this.tt);
            this.tt = '';
          }
          this.$http.jsonp('https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su', {
            wd: this.tt
          }, {
            jsonp: 'cb'
          }).then(function(res) {
            // 请求成功
            this.myData = res.data.s;
        this.now = -1; },
function(res) { // 请求失败 console.log(res.status) }) }, changeDown: function() { this.now++; // 到了最后一个选项 if (this.now === this.myData.length) { this.now = -1; } this.tt = this.myData[this.now] }, changeUp: function() { this.now--; // 到了第一个选项 if (this.now === -2) { this.now = this.myData.length - 1; } this.tt = this.myData[this.now] } } }) } script> <style type="text/css"> .gray { background: gray } style> head> <body> <div id="box"> <input type="text" v-model="tt" name="" @keyup="get($event)" @keydown.down="changeDown()" @keydown.up="changeUp()"> <ul> <li v-for="(item, index) in myData" :class="{gray:index===now}">{{item}}li> ul> div> body> html>

效果图:

vue实现百度搜索下拉提示功能_第1张图片

这个ajax请求没有做节流,很多时候需要限制ajax频繁请求,可以小改一下:

DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>Documenttitle>
  <script type="text/javascript" src="vue.js">script>
  <script type="text/javascript" src="vue-resource.js">script>
  <script type="text/javascript">
  window.onload = function() {
    var app = new Vue({
      el: '#box',
      data: {
        myData: [],
        tt: '',
        now: -1
      },
      methods: {
        get: function(e) {

          // 请求限制 按了上下箭头
          if (e.keyCode === 38 || e.keyCode === 40) {
            return
          }
          // enter跳转
          if (e.keyCode === 13) {
            window.open('https://www.baidu.com/s?wd=' + this.tt);
            this.tt = '';
          }
          // 限制频繁请求
          this.throttle(this.getData,window)
        },
        changeDown: function() {
          this.now++;
          // 到了最后一个选项
          if (this.now === this.myData.length) {
            this.now = -1;
          }
          this.tt = this.myData[this.now]
        },
        changeUp: function() {
          this.now--;
          // 到了第一个选项
          if (this.now === -2) {
            this.now = this.myData.length - 1;
          }
          this.tt = this.myData[this.now]

        },
        // 把请求单独拿出来
        getData() {
          this.$http.jsonp('https://sp0.baidu.com/5a1Fazu8AA54nxGko9WTAnF6hhy/su', {
            wd: this.tt
          }, {
            jsonp: 'cb'
          }).then(function(res) {
            // 请求成功
            this.myData = res.data.s;
        this.now = -1;
          }, function(res) {
            // 请求失败
            console.log(res.status)
          })
        },
        // 节流函数
        throttle(method,context){
            clearTimeout(method.tId);
            method.tId=setTimeout(function(){
                method.call(context);
            },300);
        }
      }
    })
  }
  script>
  <style type="text/css">
  .gray {
    background: gray
  }
  style>
head>

<body>
  
  <div id="box">
    <input type="text" v-model="tt" name="" @keyup="get($event)" @keydown.down="changeDown()" @keydown.up="changeUp()">
    <ul>
      <li v-for="(item, index) in myData" :class="{gray:index===now}">{{item}}li>
    ul>
  div>
body>

html>

 

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