Maxlength does not work in textarea for the ckeditor angularjs directive

Question

I created an application in angularjs with the ckeditor plugin, I created a directive for ckeditor, the application works fine, but the problem is that I need to set the maximum character length to 50, so I put it maxlength="50", but it doesn't work,

Can someone tell me some solution for this

Jsfiddle

HTML

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

<h3>CKEditor 4.2:</h3>
    <div ng-repeat="editor in ckEditors">
    <textarea data-ng-model="editor.value" maxlength="50" data-ck-editor></textarea>
    <br />
    </div>
    <button ng-click="addEditor()">New Editor</button>
</div>

script

var app = angular.module('app', []);

app.directive('ckEditor', [function () {
    return {
        require: '?ngModel',
        link: function ($scope, elm, attr, ngModel) {

            var ck = CKEDITOR.replace(elm[0]);

            ck.on('pasteState', function () {
                $scope.$apply(function () {
                    ngModel.$setViewValue(ck.getData());
                });
            });

            ngModel.$render = function (value) {
                ck.setData(ngModel.$modelValue);
            };
        }
    };
}])

function myCtrl($scope){
    $scope.ckEditors = [{value: ''}];
}

Answer 1

You need to add idto yours textarea, for example:

<textarea data-ng-model="editor.value" maxlength="50" id="mytext" data-ck-editor></textarea>

You need to handle key events for CKEDITOR:

window.onload = function() {
    CKEDITOR.instances.mytext.on( 'key', function() {
        var str = CKEDITOR.instances.mytext.getData();
        if (str.length > 50) {
            CKEDITOR.instances.mytext.setData(str.substring(0, 50));
        }
    } );
};

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Answer 2

. , CKEditor, maxlength.

window.onload = function() {            
    CKEDITOR.instances.mytext.on('key',function(event){
        var deleteKey = 46;
        var backspaceKey = 8;
        var keyCode = event.data.keyCode;
        if (keyCode === deleteKey || keyCode === backspaceKey)
            return true;
        else
        {
            var textLimit = 50;
            var str = CKEDITOR.instances.mytext.getData();
            if (str.length >= textLimit)
                return false;
        }
    });    
};

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