Fixes AJAX requests on sites with IDN domains in IE and Opera.
As of April 2026, IDN AJAX Workaround is a WordPress idn plugin with 10 active installations and a 0/5 rating0. It has been downloaded 3.1K+ times in total. Requires WordPress 3.2+ and PHP false+. Available on WordPress.org since 2011. Last updated 13 years ago — may have compatibility concerns. Top alternative: Google Map V3 for IDN.
In jQuery 1.5+ (bundled with WordPress 3.2+), AJAX requests on sites with IDN domains don’t work in IE or Opera.
On Edit Post screen, adding a new category results in JS error:
Message: 'parsed.responses' - is null or not an object
On Categories screen, adding a new category silently fails.
According to jaubourg’s comment in jQuery bug tracker, the request is considered cross-domain and, since IE doesn’t support cross-domain requests, AJAX won’t find a suitable transport and bail out.
This plugin implements a workaround suggested there by making AJAX requests relative.
WordPress Trac ticket: #18952
| WordPress | 3.2+ requiredTested up to 3.3.2 |
| PHP | false+ required |
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