angularjs内置了常用的表单验证指令，比如min，require等。下面是演示：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
</head>
<body ng-app="app" ng-controller="ctrl" >
<style>
.valid-error{
color:red
}
</style>
<form name="form" novalidate>
<input type="text" ng-model="value0" required name="input0">
<span class="valid-error" ng-show="form.input0.$error.required">
值必须输入
</span>
<input type="number" ng-model="value1" min="0" name="input1">
<span class="valid-error" ng-show="form.input1.$error.min">
值必须大于等于0
</span>
</form>
</body>
<script src="bower_components/angular/angular.js">
</script>
<script>
var app = angular.module('app',[]);
app.controller('ctrl',function($scope){
$scope.value0='1';
$scope.value1=0;
});
</script>
</html>
我们也可以自定义一个验证指令，比如验证电话号码的。
<input type="text" ng-model="phoneNum" name="phoneNum" phone>
<span class="valid-error" ng-show="form.phoneNum.$error.phone">
电话号码不合法
</span>
var PHONE_REGEXP = /(^(\(\d{3,4}-)|\d{3.4}-)?\d{7,8}$/;
app.directive('phone', function () {
return {
require: 'ngModel',
link: function (scope, elm, attrs, ctrl) {
ctrl.$validators.phone = function (modelValue, viewValue) {
if (ctrl.$isEmpty(modelValue)) {
// consider empty models to be valid
return true;
}
if (PHONE_REGEXP.test(viewValue)) {
// it is valid
return true;
}
// it is invalid
return false;
};
}
};
});
