MediaWiki:Gadget-HideCentralNotice.js
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/**
* 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);
}