vue实现搜索功能

2019-11-19 11:27:15

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本文实例为大家分享了vue实现搜索功能的具体代码，供大家参考，具体内容如下

methods (要有一定的触发条件才能执行，如点击事件)

<template> <div class="safetyInfo"> <input type="text" name="" id="" placeholder="搜索" v-model="search"/>  <button @click="btn">搜索</button> <ul v-for="list in searchData"> <li>  <span>{{list.name}}</span>  <span>{{list.date}}</span>  <span>{{list.depart}}</span> </li> </ul> </div></template> <script>export default { name: 'HelloWorld', data () { return {  search:'',  searchData: '', products:[  //假数据  {name:"数据1",date:'2018-01-04',depart:'泸化工1'},  {name:"数据2",date:'2018-01-25',depart:'泸化工2'},  {name:"数据3",date:'2018-02-10',depart:'泸化工3'},  {name:"数据4",date:'2018-03-04',depart:'泸化工4'},  {name:"数据5",date:'2018-05-24',depart:'泸化工5'},  {name:"数据6",date:'2018-10-29',depart:'泸化工6'}  ] } }, methods:{ btn:function(){  var search = this.search; if (search) { this.searchData = this.products.filter(function(product) {  console.log(product) return Object.keys(product).some(function(key) {  console.log(key)  return String(product[key]).toLowerCase().indexOf(search) > -1 }) }) }  } }}</script>

computed (在HTML DOM加载后马上执行的，如赋值):

<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"> <title>Document</title><script src="https://unpkg.com/vue/dist/vue.js"></script></head><body> <div id="app"><input v-model='search' /><ul v-for="item in searchData "><li>{{item.name}},价格:￥{{item.price}}</li></ul></div>  <script>var vm = new Vue({el: '#app',data: {search: '',products: [{name: '苹果',price: 25,category: "水果"}, {name: '香蕉',price: 15,category: "水果"}, {name: '雪梨',price: 65,category: "水果"}, {name: '宝马',price: 2500,category: "汽车"}, {name: '奔驰',price: 10025,category: "汽车"}, {name: '柑橘',price: 15,category: "水果"}, {name: '奥迪',price: 25,category: "汽车"}]},computed: {searchData: function() {var search = this.search; if (search) {return this.products.filter(function(product) {return Object.keys(product).some(function(key) {return String(product[key]).toLowerCase().indexOf(search) > -1})})} return this.products;}}})</script>  </body></html>

注：some()为数组中的每个元素执行一次callback函数，直到它找到一个返回值为可以转化为布尔值true的值,此时some()方法将立刻返回true，否则立刻返回false

by the way:

watch 它用于观察Vue实例上的数据变动。对应一个对象，键是观察表达式，值是对应回调。值也可以是方法名，或者是对象，包含选项。

所以他们的执行顺序为：默认加载的时候先computed再watch，不执行methods；等触发某一事件后，则是：先methods再watch。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持武林网。

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