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POAngularjs Form/Field validation using JavaScript function without directives
 

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  1. POAngularjs Form/Field validation using JavaScript function without directives
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    <p>Is there a way to validate a field in angular <strong>without using a directive</strong>? For example: I want to make following validation on an input field.</p> <ul> <li>If field is empty we should show "Field must contain a value" message.</li> <li>if field contains alpha Numeric characters we should show "Field can contain only digits".</li> <li>An EVEN number - message to the user "Value must be an even number".</li> </ul> <p><strong>I want to make following validation in a call to JavaScript function.</strong></p> <p>I googled around and saw that there is a way to use ng-valid and $error , however I was not managed to make it work.</p> <p>Code below is according to one of the answers I got: </p> <pre><code>&lt;div ng-app&gt; &lt;form name='theForm' novalidate&gt; &lt;input type='text' name='theText' ng-model='theText' ng-pattern='/^[0-9]+$/'/&gt; &lt;span ng-show='theForm.theText.$error.pattern'&gt;Field can contain only digits&lt;/span&gt; &lt;span ng-show='theText.length&lt;1'&gt;Field must contain a value&lt;/span&gt; &lt;span ng-show='theText%2!=0&amp;&amp;document.getElementsByName("theText").value!=""&amp;&amp;!theForm.theText.$error.pattern&amp;&amp;!theForm.theText.$pristine'&gt;Value must be an even number&lt;/span&gt; &lt;br/&gt;&lt;input type='submit' value='Submit' /&gt; &lt;/form&gt; </code></pre> <p></p> <p>I want to take what inside the last [span] and put inside a JavaScript function in order to make it more generic and eventually change only JS and not the HTML when conditions are changing</p> <p>Can someone please advise? a working example would be great.</p>
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    1. COIf you wanna do all of these validations in a javascript function, why not go the angular way and create a custom validation directive?
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      1. USShay Friedman
    2. COWhy do you want to use a Javascript function ? Angular can do it while watching the models like here : http://jsfiddle.net/DotDotDot/6UJZk/1/ , using another function wouldn't be as efficient I think
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