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    <p>Since I'm using Bootstrap 3, I use a directive: (see <a href="http://plnkr.co/edit/0ED8x3?p=preview" rel="nofollow">plunkr</a>)</p> <pre><code> var ValidSubmit = ['$parse', function ($parse) { return { compile: function compile(tElement, tAttrs, transclude) { return { post: function postLink(scope, element, iAttrs, controller) { var form = element.controller('form'); form.$submitted = false; var fn = $parse(iAttrs.validSubmit); element.on('submit', function(event) { scope.$apply(function() { element.addClass('ng-submitted'); form.$submitted = true; if(form.$valid) { fn(scope, {$event:event}); } }); }); scope.$watch(function() { return form.$valid}, function(isValid) { if(form.$submitted == false) return; if(isValid) { element.removeClass('has-error').addClass('has-success'); } else { element.removeClass('has-success'); element.addClass('has-error'); } }); } } } } }] app.directive('validSubmit', ValidSubmit); </code></pre> <p>and then in my HTML:</p> <pre><code>&lt;form class="form-horizontal" role="form" name="form" novalidate valid-submit="connect()"&gt; &lt;div class="form-group"&gt; &lt;div class="input-group col col-sm-11 col-sm-offset-1"&gt; &lt;span class="input-group-addon input-large"&gt;&lt;i class="glyphicon glyphicon-envelope"&gt;&lt;/i&gt;&lt;/span&gt; &lt;input class="input-large form-control" type="email" id="email" placeholder="Email" name="email" ng-model="email" required="required"&gt; &lt;/div&gt; &lt;p class="col-sm-offset-3 help-block error" ng-show="form.$submitted &amp;&amp; form.email.$error.required"&gt;please enter your email&lt;/p&gt; &lt;p class="col-sm-offset-3 help-block error" ng-show="form.$submitted &amp;&amp; form.email.$error.email"&gt;please enter a valid email&lt;/p&gt; &lt;/div&gt; &lt;/form&gt; </code></pre> <p><strong>UPDATED</strong></p> <p>In my latest project, I use <strong><em>Ionic</em></strong> so I have the following, which automatically puts <code>.valid</code> or <code>.invalid</code> on the <code>input-item</code>'s:</p> <pre><code>.directive('input', ['$timeout', function ($timeout) { function findParent(element, selector) { selector = selector || 'item'; var parent = element.parent(); while (parent &amp;&amp; parent.length) { parent = angular.element(parent); if (parent.hasClass(selector)) { break; } parent = parent &amp;&amp; parent.parent &amp;&amp; parent.parent(); } return parent; } return { restrict: 'E', require: ['?^ngModel', '^form'], priority: 1, link: function (scope, element, attrs, ctrls) { var ngModelCtrl = ctrls[0]; var form = ctrls[1]; if (!ngModelCtrl || form.$name !== 'form' || attrs.type === 'radio' || attrs.type === 'checkbox') { return; } function setValidClass() { var parent = findParent(element); if (parent &amp;&amp; parent.toggleClass) { parent.addClass('validated'); parent.toggleClass('valid', ngModelCtrl.$valid &amp;&amp; (ngModelCtrl.$dirty || form.$submitted)); parent.toggleClass('invalid', ngModelCtrl.$invalid &amp;&amp; (ngModelCtrl.$dirty || form.$submitted)); $timeout(angular.noop); } } scope.$watch(function () { return form.$submitted; }, function (b, a) { setValidClass(); }); var before = void 0; var update = function () { before = element.val().trim(); ngModelCtrl.$setViewValue(before); ngModelCtrl.$render(); setValidClass(); }; element .on('focus', function (e) { if (ngModelCtrl.$pristine) { element.removeClass('$blurred'); } }) .on('blur', function (e) { if (ngModelCtrl.$dirty) { setValidClass(); element.addClass('$blurred'); } }).on('change', function (e) { if (form.$submitted || element.hasClass('$blurred')) { setValidClass(); } }).on('paste', function (e) { if (form.$submitted || element.hasClass('$blurred')) { setValidClass(); } }) ; } }; }]) </code></pre> <p>and then in the HTML:</p> <pre><code> &lt;form name='form' novalidate="novalidate" ng-submit="auth.signin(form, vm)"&gt; &lt;label class="item item-input item-floating-label"&gt; &lt;span class="input-label"&gt;Email&lt;/span&gt; &lt;input type="email" placeholder="Email" ng-model="vm.email" autofocus="true" required &gt; &lt;/label&gt; &lt;button ng-if="!posting" type="submit" class="item button-block item-balanced item-icon-right call-to-action"&gt;Login&lt;i class="icon ion-chevron-right"&gt;&lt;/i&gt; &lt;/button&gt; </code></pre> <p>and in the controller:</p> <pre><code> self.signin = function (form, data) { if (!form.$valid) return; Authentication.emailLogin(data) //... </code></pre> <p>so, now, in the CSS, you can do stuff like:</p> <pre><code>.item.valid::before{ float: right; font-family: "Ionicons"; font-style: normal; font-weight: normal; font-variant: normal; text-transform: none; text-rendering: auto; line-height: 1; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; color: #66cc33; margin-right: 8px; font-size: 24px; content: "\f122"; } .item.invalid::before{ float: right; font-family: "Ionicons"; font-style: normal; font-weight: normal; font-variant: normal; text-transform: none; text-rendering: auto; line-height: 1; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; color: #ef4e3a; margin-right: 8px; font-size: 24px; content: "\f12a"; /* border-left: solid 2px #ef4e3a !important; border-right: solid 2px #ef4e3a !important; */ } </code></pre> <p><strong>MUCH SIMPLER!</strong></p>
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