MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */
mw.hook( 'wikipage.content' ).add( function ( $content ) {
    $content.find( '.commentary-toggle' ).on( 'click', function () {
        var target = $( this ).attr( 'data-target' );
        var $body = $( '#' + CSS.escape( target ) );
        if ( $body.length ) {
            $body.toggleClass( 'commentary-hidden' );
        }
    } );
} );