wikimedia/mediawiki-extensions-CirrusSearch

$( () => {
    const router = require( 'mediawiki.router' );

    // Always clean up the address bar, even (and especially) if the feature is disabled.
    try {
        const url = new URL( location.href );
        if ( url.searchParams.get( 'searchToken' ) ) {
            url.searchParams.remove( 'searchToken' );
            router.navigateTo( document.title, {
                path: url.toString(),
                useReplaceState: true
            } );
        }
    } catch ( e ) {
        // Don't install the click handler if the location can't be parsed
        return;
    }

    // Don't install the click handler if the feature isn't enabled
    if ( !mw.config.get( 'wgCirrusSearchRequestSetToken' ) ) {
        return;
    }

    /**
     * Called when an anchor link in the content area is clicked.
     *
     * Note:
     *
     * - This is not limited to links that navigate away, e.g. hash links,
     *   or links within interactive widgets created by JS.
     *   This means in some edge cases we'll un-pretty the address bar when the
     *   user is still on the SERP. This is sub-optimal but accepted given
     *   how rare it is for interface messages or gadgets to add such links
     *   to a SERP.
     *
     * - This is not guruanteed to be called only once for a given link (e.g.
     *   hook may fire again for a subset or superset of previously-rendered
     *   content). Again, unlikely on Special:Search, but okay as the below
     *   is safe to run multiple times.
     */
    function handlePossiblyNavigatingClick() {
        try {
            const clickUrl = new URL( location.href );
            clickUrl.searchParams.set(
                'searchToken',
                mw.config.get( 'wgCirrusSearchRequestSetToken' )
            );
            router.navigateTo( document.title, {
                path: clickUrl.toString(),
                useReplaceState: true
            } );
        } catch ( e ) {
        }
    }

    // Bind to content area (instead of document.body) to avoid most potential
    // issues and overhead from clicks that are definitely not to a search result.
    mw.hook( 'wikipage.content' ).add( ( $content ) => {
        // Optimisation: Avoid overhead from finding, iterating, and creating event bindings
        // for every result. Use a delegate selector instead.
        $content.on( 'click', 'a', handlePossiblyNavigatingClick );
    } );
} );