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Asked: 2026-05-23T11:00:55+00:00

http://jsfiddle.net/FarqA/ ajax_info.txt is a valid file on my computer. The error returns as thus:

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http://jsfiddle.net/FarqA/

ajax_info.txt is a valid file on my computer. The error returns as thus:

Uncaught Error: INVALID_STATE_ERR DOM Exception 11
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  1. Editorial Team

    Many browsers will refuse to load local files through an XMLHttpRequest as a security measure. AJAX requests are restricted by the Same Origin Policy, but as the linked Wikipedia page notes,

    The behavior of same-origin checks and related mechanisms is not well-defined in a number of corner cases, such as for protocols that do not have a clearly defined host name or port associated with their URLs (file:, data:, etc.).

    Loading a local file, even with a relative URL, is the same as loading a file with the file: protocol. Many web browsers restrict this, with good reason – imagine running a malicious HTML file on your local machine that could load any file on your computer and post its contents to a remote server.

    So my guess is that the problem is that you’re trying to load a local file. Try serving your script on a local or remote webserver and see if that fixes the problem. (If you have Python installed, you can go to the directory in question and run python -m SimpleHTTPServer 8000, then go to http://localhost:8000/ in your browser).

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