How to implement validation in Angular
This article mainly introduces the simple verification function of Angular, involving AngularJS event response, regular judgment, dynamic modification of page element attributes and other related operation skills. Friends in need can refer to it
The example of this article tells the simple story of Angular Verification function. Share it with everyone for your reference, the details are as follows:
Let’s take a look at the running effect first:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>www.jb51.net angular验证功能</title>
<script src="angular.min.js"></script>
<style>
input{
display: block;
}
ul li{
color: red;
}
</style>
<script>
angular.module("myapp",[])
.controller("demoC",function($scope){
$scope.datas = [{
id: 10011120,
name: "iphoneX",
num: 99
},
{
id: 10011121,
name: "华为mate10",
num: 20
},
{
id: 10011122,
name: "vivoR12",
num: 55
}
]; //定义一个数组
$scope.save=function(){
//创建一个存放错误信息数组
$scope.error_val=[];
var reg_id=/^\d{8,8}$/; //只能8位数字
if(!reg_id.test($scope.id)){
$scope.error_val.push("资产编号格式，必须为数字，且长度为8位");
}
//资产名称
if($scope.name==undefined||$scope.name==""){
$scope.error_val.push("资产名称不能为空!");
}else{
for(var i in $scope.datas){
if($scope.name==$scope.datas[i].name){
$scope.error_val.push("资产名称已经存在");
break; //结束循环,已经查找到资产名称不合法
}
}
}
//资产数量
var reg_num=/^\d{1,}$/; //只能8位数字
if(!reg_num.test($scope.num)){
$scope.error_val.push("资产编号数量，必须为数字");
}else{
if($scope.num<=0){
$scope.error_val.push("资产编号数量必须大于0");
}
}
//何时添加进行,何时不添加
if($scope.error_val.length==0){
$scope.datas.push({
id:$scope.id,
name:$scope.name,
num:$scope.num
});
}
}
})
</script>
</head>
<body ng-app="myapp" ng-controller="demoC">
<table border="1px solid">
<tr>
<td>资产编号</td>
<td>资产名称</td>
<td>资产数量</td>
</tr>
<tr ng-repeat="d in datas">
<td>{{d.id}}</td>
<td>{{d.name}}</td>
<td>{{d.num}}</td>
</tr>
</table>
<p>
<form>
资产编号<input ng-model="id" />
资产名称<input ng-model="name" />
资产数量<input ng-model="num" />
<p>
<ul>
<li ng-repeat="e in error_val">
{{e}}
</li>
</ul>
</p>
<button ng-click="save()">
资产录入
</button>
</form>
</p>
</body>
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