Utilizing AngularJS ng-messages feature across various languages

Utilizing ng-messages to show error messages for form validation in my application. I have a multi-language app, how can I implement ng-messages to support multiple languages?

HTML Form

<div class="messages" ng-messages="myForm.email.$error">
    <div ng-messages-include="messages.html"></div>
</div>

messages.html

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.23/angular.min.js"></script>
<p ng-message="required">This field is required</p>
<p ng-message="minlength">This field is too short</p>
<p ng-message="maxlength">This field is too long</p>
<p ng-message="required">This field is required</p>
<p ng-message="email">This needs to be a valid email</p>

P.S.: Utilizing angular 1.4.6

Answer №1

An alternative method, though less sustainable in the long term, is to create separate JavaScript files for each language's messages (e.g. italian.js, english.js ...) 1) Have multiple index pages for each language and reference the corresponding locale js file in each index page. 2) When the language is changed, update the index page accordingly so that the locale reference changes automatically.

Instead of hardcoding "This field is required," use {{requiredMessage}} as a placeholder.

In locale-english.js:

controllersModule.controller('HeaderLocale', ['$scope', function($scope) {
    $scope.requiredMessage='This field is required';
}

In locale-italian.js:

controllersModule.controller('HeaderLocale', ['$scope', function($scope) {
    $scope.requiredMessage='This field is required message in italian';
}

Answer №2

Though it may be a bit late, if you're in need of assistance with translation, I recently came across a solution that could benefit others. My quest led me to the angular translate library, which proved invaluable for translating view labels, server-side messages, and frontend validations.

<p ng-message="required" translate="">required_msg </p>
<p ng-message="minlength" translate="">too_short_msg</p>
<p ng-message="maxlength" translate="">too_long_msg</p>
<p ng-message="email" translate="">invalid_email_msg</p>
<p ng-message="pattern" translate="">invalid_characters_msg</p>

I also stored the keys and their respective values in a locale file for each required language, like locale-en.js:

  "required_msg" : "This field is required" ,
  "too_short_msg" : "This field is too short",
  "too_long_msg" : "This field is too long",
  "invalid_email_msg" : "Enter valid email",
  "invalid_characters_msg" : "Invalid Characters"

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