Simple WYSIWYG Editor
Creating a WYSIWYG textbox for your website is actually quite simple.
Thanks to the html iframe component that contains the execCommand
function, which enables us to access html tags in real time.
The following snippets shows how to implement this function:
editor.js
var Editor;
function Format(action)
{
Editor.execCommand(action, false, null);
}
function Colour(colour)
{
Editor.execCommand("forecolor",false, colour);
}
window.onload = function()
{
Editor = document.getElementById('textbox').contentWindow.document;
Editor.designMode = "on";
document.forms[0].onsubmit = function()
{
var text = document.getElementById('text');
text.value = Editor.body.innerHTML;
}
}
In the top script we attach anonymous methods to the page load event and
one on the form submit event (assigns the contents of the iframe to a form
control - since we need to submit it via the page)
editor.html
<html>
<head>
<title>Simple Javascript WYSIWYG Editor</title>
<script language="Javascript" src="editor.js"></script>
</head>
<body>
<form method="POST">
<div>
<input type="button" onclick="Colour('Green')" style="background-color:Green;" />
<input type="button" onclick="Colour('Red')" style="background-color:Red;" />
<input type="button" onclick="Colour('Blue')" style="background-color:Blue;" />
<input type="button" onclick="Colour('Black')" style="background-color:Black;" />
<input type="button" onclick="Format('bold')" value="B" />
<input type="button" onclick="Format('italic')" value="I" />
<input type="button" onclick="Format('Underline')" value="U" />
<input type="button" onclick="Format('justifycenter')" value="C" />
<input type="button" onclick="Format('justifyleft')" value="L" />
<input type="button" onclick="Format('justifyright')" value="R" /><br/>
<iframe id="textbox" style="width:300px; height:150px"></iframe><br/>
<input type="submit" value="Go" />
<input type="hidden" id="text" name="text" />
</div>
</form>
</body>
</html>
This is just a basic implementation of the execCommand function, here is a small list of properties one can
use as well, things like cut/paste inserting tables/links/images etc:
BackColor: Get or set the background color of the selected region.
(this property shows some weird behavior in Firefox 2.0)
Copy: Copies the selected region to the clipboard.
Cut: Removes the selected region from the document.
Paste: Adds data from clipboard to region (if applicable).
InsertHorizontalRule: Adds a horizontal rule to the region.
InsertImage: Displays an IE defined modal dialog that contains full image selection features, alt tag modification, border setting, etc.
InsertMarquee: Converts the selected text into a marque.
InsertSelectDropDown: Adds a drop down list to the region.
Print: Displays the windows print dialog so that the region can be printed.
Refresh: Refreshes the region.
CreateLink: Displays an IE defined modal dialog that lets you add a hyperlink using either selected text or new text.
InsertUnorderedList: Toggles between the selected text being an unordered list and normal text.
2009-08-17:
I went through all the comments I received regarding this post and wrote some additional code that can be downloaded from
here, which will be featured in a future article.
Posted by - Christoff Truter
Date - 2007-02-01 12:00:00
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