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Firebug Tip: using command line within an iframe

by Honza

Firebug command line allows executing JavaScript expressions within context of the current page. Firebug also provides a set of built in APIs and one of them is cd().

cd(window) By default, command line expressions are relative to the top-level window of the page, cd() allows you to use the window of a frame in the page instead.

There is several ways how to use this method. First, let's imagine following page:

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>Console Test Page</title>
</head>
<body>
    <iframe id="frameID" name="frameName" src="iframe.html" />
</body>
</html>
  • cd(document.getElementById("frameID").contentWindow); switch to a frame by ID
  • cd(window.frames[0]); switch to the first frame in the list of frames
  • cd(window.frames["frameName"]); switch to a frame using by name
  • cd(window.top); switching back to the top level window

Check the example page online.

See all Firebug tips

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10 Comments

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  3. I've always wanted that... thanks!

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  5. Honza, thanks for sharing this useful tip. Before I had to right click the iframe and choose Display Only This Iframe (or something similar)

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