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Capture ctrl+s to update the value in JavaScript (ES5) RichTextEditor control

To achieve this, we need to bind the keydown event to the Rich Text Editor content and capture the ctrl + s key press using its keyCode. In the keydown event handler, the updateValue method is called to update the value property and then we can save the content in the required database using the same.

Source
Preview
index.js
index.html
var defaultRTE = new ej.richtexteditor.RichTextEditor({});
defaultRTE.appendTo('#defaultRTE');

defaultRTE.contentModule.getDocument().addEventListener("keydown", function (e) {
      if (e.key === 's' && e.ctrlKey === true) {
            e.preventDefault(); // to prevent default ctrl+s action
            defaultRTE.updateValue(); // to update the value after editing
            var value = defaultRTE.value; // you can get the RTE content to save in the desired database
      }
});
<!DOCTYPE html><html lang="en"><head>
    <title>Essential JS 2 Rich Text Editor</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta name="description" content="Typescript UI Controls">
    <meta name="author" content="Syncfusion">
    <link href="index.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-base/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-richtexteditor/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-inputs/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-lists/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-navigations/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-popups/styles/material.css" rel="stylesheet">
     <link href="//cdn.syncfusion.com/ej2/ej2-buttons/styles/material.css" rel="stylesheet">
    <link href="//cdn.syncfusion.com/ej2/ej2-splitbuttons/styles/material.css" rel="stylesheet">
    <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Roboto">
    <link rel="stylesheet" href="http://fonts.googleapis.com/css?family=Great+Vibes">
    
    

<script src="https://cdn.syncfusion.com/ej2/dist/ej2.min.js" type="text/javascript"></script>
</head>

<body>
    
    <div id="container">
        <div id="defaultRTE">
            <p>The Rich Text Editor is WYSIWYG (&quot;what you see is what you get&quot;) editor useful to create and edit content, and return the valid <a href="https://ej2.syncfusion.com/home/" target="_blank">HTML markup</a> or <a href="https://ej2.syncfusion.com/home/" target="_blank">markdown</a> of the content</p>
            <p><b>Key features:</b></p>
            <ul>
                <li>
                    <p>Provides <b>IFRAME</b> and <b>DIV</b> modes</p>
                </li>
                <li>
                    <p>Capable of handling markdown editing.</p>
                </li>
                <li>
                    <p>Contains a modular library to load the necessary functionality on demand.</p>
                </li>
                <li>
                    <p>Provides a fully customizable toolbar.</p>
                </li>
            </ul>
        </div>
    </div>
    <style>

    </style>


<script>
var ele = document.getElementById('container');
if(ele) {
    ele.style.visibility = "visible";
 }   
        </script>
<script src="index.js" type="text/javascript"></script>
</body></html>