User:Izno/persistentParams.js References

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Documentation for this user script can be added at User:Izno/persistentParams.

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$( () => {

	'use strict';

	mw.loader.using( 'mediawiki.util', () => {

		 'uselang', 'useskin' ].forEach( param => {

			if ( mw.util.getParamValue( param ) ) {

				$( 'a' ).each( ( i, e ) => {

					$( e ).attr( 'href', ( ind, old ) => {

						if ( e.href ) {

							const url = new URL( e.href );

							const base = url.origin + url.pathname;

							const searchParams = new URLSearchParams( url.searchParams );

							searchParams.set( param, mw.util.getParamValue( param ) );

							return base + '?' + searchParams.toString() + url.hash;

						}

					} );

				} );

				$( 'form' ).each( ( i, e ) => {

					$( e ).attr( 'action', ( ind, old ) => {

						if ( !old.includes( '#' ) ) {

							return old + '&' + param + '=' + mw.util.getParamValue( param );

						}

					} );

				} );

			}

		} );

	} );

} );