MediaWiki:Common.js

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/* Any JavaScript here will be loaded for all users on every page load. */

// Make sure the utilities module is loaded (will only load if not already)
mw.loader.using( 'mediawiki.util', function () {

    // Wait for the page to be parsed
    $(document).ready( function () { 

        //see below "Portlets" subsection
        var link = mw.util.addPortletLink( 'p-cactions', '#', 'viki', 'ca-viki', 'Show viki diagram for this page'); 
        $( link ).click( function ( event ) {

            event.preventDefault();
            var $txt = $( '#wpTextbox1' );
            $txt.prepend( 'new phrase' )

        } );
    } );
} );