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利用angular、react和vue實(shí)現(xiàn)相同的面試題組件

更新時(shí)間：2018年02月19日 10:21:48 作者：前端++

eact 和angular，vue 這三個(gè)框架最近都比較火，下面這篇文章主要給大家介紹了關(guān)于利用angular、react和vue實(shí)現(xiàn)相同的面試題組件的相關(guān)資料，文中通過(guò)示例代碼介紹的非常詳細(xì)，需要的朋友可以參考下。

前言

本文主要給大家介紹的是關(guān)于angular、react和vue實(shí)現(xiàn)相同的面試題組件的相關(guān)內(nèi)容，分享出來(lái)供大家參考學(xué)習(xí)，下面話不多說(shuō)了，來(lái)一起看看詳細(xì)的介紹吧。

面試題要求如下所示

1、angular：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="angular-1.4.6.js"></script>
<style>
.del{
text-decoration: line-through;
color: red;
}
.in1{
margin-left: 40px;
}
</style>
</head>
<body ng-app="app" ng-controller="my-ctrl">
<input type="text" ng-model="val">
<button ng-click="add()">添加</button>
<ul>
<li ng-repeat="(key,item) in items" ng-show="flag||!items[key].labs" ng-class={true:'del',false:'unselected'}[items[key].labs]><input type="checkbox" ng-click="labe()" ng-model="lab">{{item.text}}<input type="button" value="刪除" ng-click="delate()" class="in1"></li>
</ul>
<button type="button" ng-click="showall()">已完成開(kāi)關(guān)顯示</button>
<button type="button" ng-click="delateall()">清除已完成</button>
</body>
<script type="text/javascript">
var myapp = angular.module("app",[]);
myapp.controller("my-ctrl",function($scope){
$scope.items = [];
$scope.flag = 1;
$scope.add=function(){
$scope.items.unshift({text:$scope.val,labs:0}); 
}
$scope.delate=function(){ 
$scope.items.splice(this.$index,1);
}
$scope.labe=function(){ 
$scope.items[this.$index].labs=this.lab;
}
$scope.showall=function(){
if($scope.flag == 0){
$scope.flag = 1;
}
else{
$scope.flag = 0;
}
}
//倒序刪除數(shù)組元素

//這里必須使用倒敘刪除數(shù)組因?yàn)閍ngular數(shù)據(jù)雙向綁定，正序的話會(huì)導(dǎo)致數(shù)據(jù)隨時(shí)更新影響for循環(huán)

$scope.delateall=function(){ 
for(var i=$scope.items.length-1;i>=0;i--){
if($scope.items[i].labs==true){
$scope.items.splice(i,1);
}
}
}

//delateall除了這種方式書寫還有另外一種正序刪除的方式

//$scope.delateall=function(){
//$scope.delall=[];
//for(var i=0;i<$scope.items.length;i++){
//if($scope.items[i].labs == true){
//console.log(i);
//$scope.delall.push(i);
//} 
//}
//console.dir($scope.delall);
//for(var j=0;j<$scope.delall.length;j++){
//if(j==0){
//$scope.items.splice($scope.delall[j],1); 
//}
//else{
//$scope.items.splice(($scope.delall[j]-j),1); 
//}
//}
//console.dir($scope.items);
//}
})
</script>
</html>

2、react:

import React, { Component } from 'react';
import './App.css';

class App extends Component {
constructor(){
super();
this.state={
alll:[],
values:'',
flag:true
}
}
add(e){
let arr1 = this.state.alll;
arr1.push({msg:this.state.values,check1:false});
this.setState({
alll:arr1
})
console.log(this.state.alll);
}
change(e){
this.setState({
values:e.nativeEvent.target.value
})

}
delate(e){
let index1 = e.target.parentNode.id;
let arr1 = [];
for(var i =0;i<this.state.alll.length;i++){
arr1.push(JSON.parse(JSON.stringify(this.state.alll[i])));
}
arr1.splice(index1,1);
console.log(arr1);
this.setState(
{alll: arr1},
() =>{
alert(1);
console.log(this.state.alll)
}
)
}
checktoggle(e){
let index1 = e.target.parentNode.id;
let arr1 = this.state.alll;
arr1[index1].check1 = !arr1[index1].check1;
this.setState({
alll:arr1
})
console.log(this.state.alll);
}
hideandshow(e){
this.setState({
flag : !this.state.flag
})
}
removeAll(){
let arr1 = [];
for(var i =0;i<this.state.alll.length;i++){
arr1.push(JSON.parse(JSON.stringify(this.state.alll[i])));
}
for(let i = arr1.length-1;i>-1;i--){
console.log(i);
if(arr1[i].check1 === true){
arr1.splice(i,1);
}
}
this.setState({
alll:arr1
})
console.log(this.state.alll);
}
render() {
var result = [];
for(let i = 0;i<this.state.alll.length;i++){
result.push(<div key={i} id={i} className={this.state.flag||!this.state.alll[i].check1?'dis1':'disn'}><input type="checkbox" onClick={this.checktoggle.bind(this)} checked={this.state.alll[i].check1} name={i} /><span className={this.state.alll[i].check1?'del1':''}>{this.state.alll[i].msg}</span><input type="button" value="刪除" onClick={this.delate.bind(this)} className="in" /></div>)
}
return (
<div className="App">
{this.state.values}

<input type="text" placeholder="請(qǐng)?zhí)砑邮录? className="in" onChange={this.change.bind(this)} /> 
<input type="button" value="添加" onClick={this.add.bind(this)}/>
<ul ref="ul1">

{result}

</ul>
<input type="button" value="已完成顯示開(kāi)關(guān)" className="in" onClick={this.hideandshow.bind(this)}/>
<input type="button" value="清除已完成" className="in" onClick={this.removeAll.bind(this)}/>
</div>
);
}
}
export default App;
//使用react寫時(shí)，數(shù)組的復(fù)制有使用的不標(biāo)準(zhǔn)，正確的深度復(fù)制應(yīng)該轉(zhuǎn)化為字符串以后再?gòu)?fù)制，類似于代碼中removeAll復(fù)制的方式。但是在當(dāng)前實(shí)例中淺復(fù)制也可以完成功能。

3、vue2.0：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<script src="vue2.0.js"></script>
<style>
.in{
margin:20px; 
}
.cl1{
text-decoration: line-through;
color: red;
}
.cl2{

}
</style>
</head>
<body>
<div id="app">
<input type="text" placeholder="請(qǐng)?zhí)砑邮录? class="in" v-model="msg"/>
<input type="button" value="添加" @click="add()"/>
<div v-for="(item,index) in alll" :key="index" :id="index" v-if="flag1||!item.check1">
<input type="checkbox" class="in" @click="clickChecked" :checked="item.check1"/>
<span>{{item.msg1}}</span>
<input type="button" value="刪除" class="in" @click="delate"/>
</div>
<div>
<input type="button" value="已完成顯示開(kāi)關(guān)" class="in" @click="showAll"/>
<input type="button" value="清除已完成" class="in" @click="removeAll($event)"/>
</div>
</div>
<script>
new Vue({
el:'#app',
data:{
msg:'',
alll:[],
flag1:true,

},
methods:{
add(){
this.alll.unshift({msg1:this.msg,check1:false});
console.log(this.alll)
},
delate(e){
let index1 = e.target.parentNode.id;
this.alll.splice(index1,1);
console.log(this.alll);
},
clickChecked(e){
let index1 = e.target.parentNode.id;
this.alll[index1].check1 = !this.alll[index1].check1;
},
showAll(){
this.flag1 = !this.flag1;
},
removeAll(){
console.log(this.alll);
for(var i =this.alll.length-1;i>-1;i--){
if(this.alll[i].check1==true){
this.alll.splice(i,1);
}
}
// for(let i = 0;i<this.alll.length;i++){
// if(this.alll[i].check1==true){
// this.alll.splice(i,1);
// }
// }//由于vue的數(shù)據(jù)雙向綁定，從前到后遍歷刪除存在錯(cuò)誤。
}
}
})
</script>
</body>
</html>