MediaWiki:Gadget-site-hideprefix.js

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/**
 * Hide prefix in category
 *
 * @source https://www.mediawiki.org/wiki/Snippets/Hide_prefix_in_category
 * @rev 2020-04-28
 */
$( function () {
    var prefix = $( '#mw-cat-hideprefix' ).text().trim();
    if ( prefix ) {
        $( '#mw-pages a' ).text( function ( i, val ) {
            return val.slice( 0, prefix.length ) === prefix ? val.slice( prefix.length ) : val;
        } );
    }
} );