Why Does My Same-Origin AJAX Request Fail with a 'Cross Origin Request Error'?

Cross Origin Request Error: File Fetch Fails for Same-Origin Request

When attempting to make an AJAX request to a local webserver file using jQuery, developers may encounter the following error: "XMLHttpRequest cannot load file:///C:/xampp/htdocs/webname/resources/templates/signup.php. Cross origin requests are only supported for HTTP."

Despite the error message suggesting a cross-domain request issue, in this case, the request is for a local file hosted on the same web server as the website.

Solution: Allow File Access via Chrome Switch

To resolve this problem, developers can utilize a Chrome command-line switch to allow file access from local files.

1. For OS X:

    open -a 'Google Chrome' --args -allow-file-access-from-files

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2. For *NIX:

   google-chrome --allow-file-access-from-files

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3. For Windows:
   Edit the target path of the Chrome shortcut, adding the following switch:

   C:\ ... \Application\chrome.exe --allow-file-access-from-files

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