问题
Am trying to validate an Email id field in angularJs using ng-pattern directive.
But am new to AngularJs. I need to show an error message as soon as the user enters the wrong email id.
The code which I have below is am trying to solve. Help me out with using ng-pattern for getting the proper result.
<script type="text/javascript" src="/Login/script/ang.js"></script>
<script type="text/javascript">
function Ctrl($scope) {
$scope.text = 'enter email';
$scope.word = /^[a-z]+[a-z0-9._]+@[a-z]+\.[a-z.]{2,5}$/;
}
</script>
</head>
<body>
<form name="myform" ng-controller="Ctrl">
<input type="text" ng-pattern="word" name="email">
<span class="error" ng-show="myform.email.$error.pattern">
invalid email!
</span>
<input type="submit" value="submit">
</form>
</body>
回答1:
If you want to validate email then use input with type="email" instead of type="text". AngularJS has email validation out of the box, so no need to use ng-pattern for this.
Here is the example from original documentation:
<script>
function Ctrl($scope) {
$scope.text = 'me@example.com';
}
</script>
<form name="myForm" ng-controller="Ctrl">
Email: <input type="email" name="input" ng-model="text" required>
<br/>
<span class="error" ng-show="myForm.input.$error.required">
Required!</span>
<span class="error" ng-show="myForm.input.$error.email">
Not valid email!</span>
<br>
<tt>text = {{text}}</tt><br/>
<tt>myForm.input.$valid = {{myForm.input.$valid}}</tt><br/>
<tt>myForm.input.$error = {{myForm.input.$error}}</tt><br/>
<tt>myForm.$valid = {{myForm.$valid}}</tt><br/>
<tt>myForm.$error.required = {{!!myForm.$error.required}}</tt><br/>
<tt>myForm.$error.email = {{!!myForm.$error.email}}</tt><br/>
</form>
For more details read this doc: https://docs.angularjs.org/api/ng/input/input%5Bemail%5D
Live example: http://plnkr.co/edit/T2X02OhKSLBHskdS2uIM?p=info
UPD:
If you are not satisfied with built-in email validator and you want to use your custom RegExp pattern validation then ng-pattern directive can be applied and according to the documentation the error message can be displayed like this:
The validator sets the pattern error key if the ngModel.$viewValue does not match a RegExp
<script>
function Ctrl($scope) {
$scope.text = 'me@example.com';
$scope.emailFormat = /^[a-z]+[a-z0-9._]+@[a-z]+\.[a-z.]{2,5}$/;
}
</script>
<form name="myForm" ng-controller="Ctrl">
Email: <input type="email" name="input" ng-model="text" ng-pattern="emailFormat" required>
<br/><br/>
<span class="error" ng-show="myForm.input.$error.required">
Required!
</span><br/>
<span class="error" ng-show="myForm.input.$error.pattern">
Not valid email!
</span>
<br><br>
<tt>text = {{text}}</tt><br/>
<tt>myForm.input.$valid = {{myForm.input.$valid}}</tt><br/>
<tt>myForm.input.$error = {{myForm.input.$error}}</tt><br/>
<tt>myForm.$valid = {{myForm.$valid}}</tt><br/>
<tt>myForm.$error.required = {{!!myForm.$error.required}}</tt><br/>
<tt>myForm.$error.pattern = {{!!myForm.$error.pattern}}</tt><br/>
</form>
Plunker: https://plnkr.co/edit/e4imaxX6rTF6jfWbp7mQ?p=preview
回答2:
There is nice example how to deal with this kind of problem modyfing built-in validators angulardocs. I have only added more strict validation pattern.
app.directive('validateEmail', function() {
var EMAIL_REGEXP = /^[_a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/;
return {
require: 'ngModel',
restrict: '',
link: function(scope, elm, attrs, ctrl) {
// only apply the validator if ngModel is present and Angular has added the email validator
if (ctrl && ctrl.$validators.email) {
// this will overwrite the default Angular email validator
ctrl.$validators.email = function(modelValue) {
return ctrl.$isEmpty(modelValue) || EMAIL_REGEXP.test(modelValue);
};
}
}
};
});
And simply add
<input type='email' validate-email name='email' id='email' ng-model='email' required>
回答3:
According to the answer of @scx ,I created a validation for GUI
app.directive('validateEmail', function() {
var EMAIL_REGEXP = /^[_a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,4})$/;
return {
link: function(scope, elm) {
elm.on("keyup",function(){
var isMatchRegex = EMAIL_REGEXP.test(elm.val());
if( isMatchRegex&& elm.hasClass('warning') || elm.val() == ''){
elm.removeClass('warning');
}else if(isMatchRegex == false && !elm.hasClass('warning')){
elm.addClass('warning');
}
});
}
}
});
And simply add :
css
.warning{
border:1px solid red;
}
html
<input type='email' validate-email name='email' id='email' ng-model='email' required>
回答4:
This is jQuery Email Validation using Regex Expression. you can also use the same concept for AngularJS if you have idea of AngularJS.
var expression = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
Source.
回答5:
You can use ng-messages
<script src="http://ajax.googleapis.com/ajax/libs/angularjs/1.5.3/angular-messages.min.js"></script>
include the module
angular.module("blank",['ngMessages']
in html
<input type="email" name="email" class="form-control" placeholder="email" ng-model="email" required>
<div ng-messages="myForm.email.$error">
<div ng-message="required">This field is required</div>
<div ng-message="email">Your email address is invalid</div>
</div>
回答6:
Below is the fully qualified pattern for email validation.
<input type="text" pattern="/^[_a-z0-9]+(\.[_a-z0-9]+)*@[a-z0-9-]*\.([a-z]{2,4})$/" ng-model="emailid" name="emailid"/>
<div ng-message="pattern">Please enter valid email address</div>
回答7:
Now, Angular 4 has email validator built-in https://github.com/angular/angular/blob/master/CHANGELOG.md#features-6 https://github.com/angular/angular/pull/13709
Just add email to the tag. For example
<form #f="ngForm">
<input type="email" ngModel name="email" required email>
<button [disabled]="!f.valid">Submit</button>
<p>Form State: {{f.valid?'VALID':'INVALID'}}</p>
</form>
回答8:
angularjs controller way, just an example to look for one or more email in the body of a message.
sp = $scope.messagebody; // email message body
if (sp != null && sp.match(/([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)\S+/)) {
console.log('Error. You are not allowed to have an email in the message body');
}
回答9:
I tried @Joanna's method and tested on the following websites and it didn't work.
- https://regex101.com/
- https://www.regextester.com/
- https://regexr.com/
I then modified it to and it worked.
/([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)\S+
回答10:
I have tried wit the below regex it is working fine.
Email validation : \w+([-+.']\w+)@\w+([-.]\w+).\w+([-.]\w+)*
回答11:
Spend some time to make it working for me.
Requirement:
single or comma separated list of e-mails with domains ending name.surname@gmail.com or team-email@list.gmail.com
Controller:
$scope.email = {
EMAIL_FORMAT: /^\w+([\.-]?\w+)*@(list.)?gmail.com+((\s*)+,(\s*)+\w+([\.-]?\w+)*@(list.)?gmail.com)*$/,
EMAIL_FORMAT_HELP: "format as 'your.name@gmail.com' or comma separated 'your.name@gmail.com, my.name@list.gmail.com'"
};
HTML:
<ng-form name="emailModal">
<div class="form-group row mb-3">
<label for="to" class="col-sm-2 text-right col-form-label">
<span class="form-required">*</span>
To
</label>
<div class="col-sm-9">
<input class="form-control" id="to"
name="To"
ng-required="true"
ng-pattern="email.EMAIL_FORMAT"
placeholder="{{email.EMAIL_FORMAT_HELP}}"
ng-model="mail.to"/>
<small class="text-muted" ng-show="emailModal.To.$error.pattern">wrong</small>
</div>
</div>
</ng-form>
I found good online regex testing tool. Covered my regex with tests:
https://regex101.com/r/Dg2iAZ/6/tests
回答12:
Use below regular expression
^[_\.0-9a-z-]+@([0-9a-z][0-9a-z-]+)+((\.)[a-z]{2,})+$
It allows
test@test.com
test@test.co.in
test@test.gov.us
test@test.net
test@test.software
来源：https://stackoverflow.com/questions/24490668/how-to-validate-email-id-in-angularjs-using-ng-pattern