A simple userscript ad blocker
// ==UserScript==
// @name Simple Ad Blocker
// @namespace https://bing.com
// @version 0.1
// @description A simple userscript ad blocker
// @match https://*/*
// @grant none
// ==/UserScript==
(function() {
'use strict';
// A list of filters to block or hide ads
// Each filter is an object with a type (block or hide), a pattern (a string or a regular expression), and an optional domain (a string or an array of strings)
var filters = [
// Block requests to URLs that contain &ad_box_
{type: "block", pattern: "&ad_box_"},
// Hide elements with class name b-popup on hackernoon.com
{type: "hide", pattern: ".b-popup", domain: "hackernoon.com"},
// Hide elements with id ads on any domain
{type: "hide", pattern: "#ads"}
];
// Get the current domain name
var domain = window.location.hostname;
// Loop through the filters and apply them
for (var i = 0; i < filters.length; i++) {
var filter = filters[i];
// Check if the filter matches the current domain
if (!filter.domain || filter.domain === domain || (Array.isArray(filter.domain) && filter.domain.includes(domain))) {
// Check if the filter is a block filter
if (filter.type === "block") {
// Intercept and cancel requests to URLs that match the filter pattern
window.addEventListener("beforescriptexecute", function(e) {
var src = e.target.src;
if (src && (typeof filter.pattern === "string" && src.includes(filter.pattern) || filter.pattern.test(src))) {
e.preventDefault();
e.stopPropagation();
console.log("Blocked request to " + src);
}
});
}
// Check if the filter is a hide filter
else if (filter.type === "hide") {
// Hide elements that match the filter pattern using CSS
var style = document.createElement("style");
style.textContent = filter.pattern + " { display: none !important; }";
document.head.appendChild(style);
console.log("Hid elements matching " + filter.pattern);
}
}
}
})();