MediaWiki:Common.js

/* Any JavaScript here will be loaded for all users on every page load. */
/**
 * @source https://www.mediawiki.org/wiki/Snippets/Load_JS_and_CSS_by_URL
 * @revision 2016-03-26
 */
mw.loader.using( ['mediawiki.util', 'mediawiki.notify'], function () {
	var extraCSS = mw.util.getParamValue( 'withCSS' ),
		extraJS = mw.util.getParamValue( 'withJS' );

	if ( extraCSS ) {
		if ( /^MediaWiki:[^&<>=%#]*\.css$/.test( extraCSS ) ) {
			mw.loader.load( '/w/index.php?title=' + extraCSS + '&action=raw&ctype=text/css', 'text/css' );
		} else {
			mw.notify( 'Only pages from the MediaWiki namespace are allowed.', { title: 'Invalid withCSS value' } );
		}
	}

	if ( extraJS ) {
		if ( /^MediaWiki:[^&<>=%#]*\.js$/.test( extraJS ) ) {
			mw.loader.load( '/w/index.php?title=' + extraJS + '&action=raw&ctype=text/javascript' );
		} else {
			mw.notify( 'Only pages from the MediaWiki namespace are allowed.', { title: 'Invalid withJS value' } );
		}
	}
});


$(function () {

  var myElement = document.getElementById('mw-mywiki-example');
  myElement.innerHTML = '<p>hello world</p>';

}());