React, Angular und Vue sind alles drei Frameworks, die in letzter Zeit populär geworden sind. In diesem Artikel werden Ihnen hauptsächlich die relevanten Inhalte zu Angular, React und Vue vorgestellt, die dieselben Interviewfragenkomponenten implementieren Mehr werde ich im Folgenden nicht sagen, werfen wir einen Blick auf die ausführliche Einleitung.
Die Anforderungen an die Interviewfragen sind wie folgt
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="删除" ng-click="delate()" class="in1"></li>
</ul>
<button type="button" ng-click="showall()">已完成开关显示</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;
}
}
//倒序删除数组元素
//这里必须使用倒叙删除数组因为angular数据双向绑定，正序的话会导致数据随时更新影响for循环
$scope.delateall=function(){
for(var i=$scope.items.length-1;i>=0;i--){
if($scope.items[i].labs==true){
$scope.items.splice(i,1);
}
}
}
//delateall除了这种方式书写还有另外一种正序删除的方式
//$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>Nach dem Login kopieren
2 >
3. vue2.0:
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(<p 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="删除" onClick={this.delate.bind(this)} className="in" /></p>)
}
return (
<p className="App">
{this.state.values}
<input type="text" placeholder="请添加事件" 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="已完成显示开关" className="in" onClick={this.hideandshow.bind(this)}/>
<input type="button" value="清除已完成" className="in" onClick={this.removeAll.bind(this)}/>
</p>
);
}
}
export default App;
//使用react写时，数组的复制有使用的不标准，正确的深度复制应该转化为字符串以后再复制，类似于代码中removeAll复制的方式。但是在当前实例中浅复制也可以完成功能。Nach dem Login kopieren
<!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>
<p id="app">
<input type="text" placeholder="请添加事件" class="in" v-model="msg"/>
<input type="button" value="添加" @click="add()"/>
<p 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="删除" class="in" @click="delate"/>
</p>
<p>
<input type="button" value="已完成显示开关" class="in" @click="showAll"/>
<input type="button" value="清除已完成" class="in" @click="removeAll($event)"/>
</p>
</p>
<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的数据双向绑定，从前到后遍历删除存在错误。
}
}
})
</script>
</body>
</html>Nach dem Login kopieren
Das obige ist der detaillierte Inhalt vonVerwenden Sie Angular, React und Vue, um dieselbe Interviewfragenkomponente zu implementieren. Für weitere Informationen folgen Sie bitte anderen verwandten Artikeln auf der PHP chinesischen Website!
