MediaWiki:Gadget-HideCentralNotice.js

The printable version is no longer supported and may have rendering errors. Please update your browser bookmarks and please use the default browser print function instead.

This page is loaded as a part of the HideCentralNotice gadget, used by 8,389 users.

Note: After saving, you have to bypass your browser's cache to see the changes. Google Chrome, Firefox, Microsoft Edge and Safari: Hold down the ⇧ Shift key and click the Reload toolbar button. For details and instructions about other browsers, see Wikipedia:Bypass your cache.

/**
 * Prevent CentralNotice banners from being loaded.
 *
 * This script relies on being able to listen for events emitted
 * by the browser when it starts proccessing a script, image or iframe.
 * If this script is loaded after the one it is trying to prevent, it will
 * effectivelty do nothing.
 */
if ( document.addEventListener ) {

	function blockBannerLoader (e) {
		var element, src;
		if (!e || !e.preventDefault) {
			return;
		};
		element = e.target;
		if (!element) {
			return;
		}
	
		if (element.nodeName.toLowerCase() === 'script') {
			src = String(element.src);
			if (src.indexOf('Special:BannerLoader') !== -1 || src.indexOf('Special:BannerListLoader') !== -1) {
				e.preventDefault();
			}
		}
	}
	
	// Listen to every script, image, iframe etc. being addded
	document.addEventListener('beforeload', blockBannerLoader, true);
}