how to validate particular input field using angularjs?

Question

I am trying to validate some input fields using angularJS. I found some example. But they are validating entire form.

<div ng-app="myApp" ng-controller="myCtrl">

    <form name="myform">
        <input type="text" ng-model='name' ng-required="true" />
        <input type="password" ng-model='password' ng-required="true" />
        <button ng-click="myform.$valid && preview()">Preview</button>
        <button ng-click="myform.$valid && update()">Update</button>
    </form>

</div>

and controller code is

var app = angular.module('myApp', []);
app.controller('myCtrl', function($scope) {
    $scope.name=undefined;
    $scope.preview = function(){
        alert("Previewed");
    };
    $scope.update = function(){
        alert("Updated");
    }
});

The above code validating the fields based on form name. But I wanted to know is there any way to validate that particular input field ?

With validating, you mean validating if your inputs content is for e.g. a number, a particular string, etc.? — Aer0
– Aer0, Commented Feb 23, 2016 at 9:29

Louie Almeda · Accepted Answer · 2016-02-23 09:32:09Z

2

DEMO Yes you can, you must specify a name for the input like

<div ng-app="myApp" ng-controller="myCtrl">

    <form name="myform">
        <input type="text" name='name' ng-model='name' ng-required="true" />
        <input type="password" ng-model='password' ng-required="true" />
        <button ng-click="myform.$valid && preview()">Preview</button>
        <button ng-click="myform.$valid && update()">Update</button>
    </form>

</div>

then you can check if the name is valid with myForm.name.$valid

answered Feb 23, 2016 at 9:32

Louie Almeda

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Comments

Shashank · Accepted Answer · 2016-02-23 09:34:37Z

Check out the fiddle here.

Just add a name to the input filed and follow the same as you did to the form.

HTML:

<div ng-app="myApp" ng-controller="myCtrl">

    <form name="myform">
        <input type="text" ng-model='name' ng-required="true" name="txtName" />
        <input type="password" ng-model='password' ng-required="true" />
        <button ng-click="myform.$valid && preview()">Preview</button>
        <button ng-click="myform.$valid && update()">Update</button>
        <div>Status of name: <span style="color: blue">{{myform.txtName.$valid}}</span></div>

    </form>

</div>

JS:

var app = angular.module('myApp', []);
app.controller('myCtrl', function ($scope) {
    $scope.name = undefined;
    $scope.preview = function () {
        alert("Previewed");
    };
    $scope.update = function () {
        alert("Updated");
    }
});

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