MediaWiki:Common.js

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$(document).ready(function() {
    // Listen for language changes from the ULS
    $(document).on('languagechange', function() {
        // Remove the 'uselang' parameter from the URL
        var url = new URL(window.location.href);
        url.searchParams.delete('uselang');

        // Use the History API to update the URL without reloading
        window.history.replaceState({}, '', url.toString());
    });

    // Trigger language change when the ULS triggers a language switch
    mw.hook('uls.language.change').add(function() {
        // Manually trigger the language change event
        $(document).trigger('languagechange');
    });
});