ckeditor4
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JavaScript WYSIWYG web text editor.
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HTML
<!--
Copyright (c) 2003-2025, CKSource Holding sp. z o.o. All rights reserved.
CKEditor 4 LTS ("Long Term Support") is available under the terms of the Extended Support Model.
-->
<html lang="en">
<head>
<meta charset="utf-8">
<title>Using the CKEditor Read-Only API — CKEditor Sample</title>
<script src="../../ckeditor.js"></script>
<link rel="stylesheet" href="sample.css">
<meta name="description" content="Try the latest sample of CKEditor 4 and learn more about customizing your WYSIWYG editor with endless possibilities.">
<script>
var editor;
// The instanceReady event is fired, when an instance of CKEditor has finished
// its initialization.
CKEDITOR.on( 'instanceReady', function( ev ) {
editor = ev.editor;
// Show this "on" button.
document.getElementById( 'readOnlyOn' ).style.display = '';
// Event fired when the readOnly property changes.
editor.on( 'readOnly', function() {
document.getElementById( 'readOnlyOn' ).style.display = this.readOnly ? 'none' : '';
document.getElementById( 'readOnlyOff' ).style.display = this.readOnly ? '' : 'none';
} );
editor.on( 'contentPreview', function( evt ) {
evt.data.dataValue = '<div style="padding: 1.5em;border: 3px #f00 solid">' +
'<h1>Content Preview was blocked</h1>' +
'<p>To ensure the highest security, the content preview in samples was blocked.</p>' +
'<p>Please refer to our ' +
'<a href="https://ckeditor.com/docs/ckeditor4/latest/guide/dev_best_practices.html#validate-preview-content">' +
'best practices on security</a> to learn more how to properly configure and secure the content preview.</p>' +
'</div>';
} );
} );
function toggleReadOnly( isReadOnly ) {
// Change the read-only state of the editor.
// https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_editor.html#method-setReadOnly
editor.setReadOnly( isReadOnly );
}
</script>
</head>
<body>
<h1 class="samples">
<a href="index.html">CKEditor Samples</a> » Using the CKEditor Read-Only API
</h1>
<div class="warning deprecated">
This sample is not maintained anymore. Check out its <a href="https://ckeditor.com/docs/ckeditor4/latest/examples/readonly.html">brand new version in CKEditor Examples</a>.
</div>
<div class="description">
<p>
This sample shows how to use the
<code><a class="samples" href="https://ckeditor.com/docs/ckeditor4/latest/api/CKEDITOR_editor.html#method-setReadOnly">setReadOnly</a></code>
API to put editor into the read-only state that makes it impossible for users to change the editor contents.
</p>
<p>
For details on how to create this setup check the source code of this sample page.
</p>
</div>
<form action="sample_posteddata.php" method="post">
<p>
<textarea class="ckeditor" id="editor1" name="editor1" cols="100" rows="10"><p>This is some <strong>sample text</strong>. You are using <a href="https://ckeditor.com/">CKEditor</a>.</p></textarea>
</p>
<p>
<input id="readOnlyOn" onclick="toggleReadOnly();" type="button" value="Make it read-only" style="display:none">
<input id="readOnlyOff" onclick="toggleReadOnly( false );" type="button" value="Make it editable again" style="display:none">
</p>
</form>
<div id="footer">
<hr>
<p>
CKEditor - The text editor for the Internet - <a class="samples" href="https://ckeditor.com/">https://ckeditor.com</a>
</p>
<p id="copy">
Copyright © 2003-2025, <a class="samples" href="https://cksource.com/">CKSource</a> Holding sp. z o.o. All rights reserved.
</p>
</div>
</body>
</html>