home | refactor

home/gui/files/local-qutebrowser/greasemonkey/linkedin.user.js

@@ -0,0 +1,26 @@
+// ==UserScript==
+// @name Array.at polyfill
+// @run-at document-start
+// @match https://*.linkedin.com/*
+// ==/UserScript==
+// Based on: https://github.com/tc39/proposal-relative-indexing-method#polyfill
+
+function at(n) {
+	// ToInteger() abstract op
+	n = Math.trunc(n) || 0;
+	// Allow negative indexing from the end
+	if (n < 0) n += this.length;
+	// OOB access is guaranteed to return undefined
+	if (n < 0 || n >= this.length) return undefined;
+	// Otherwise, this is just normal property access
+	return this[n];
+}
+
+const TypedArray = Reflect.getPrototypeOf(Int8Array);
+for (const C of [Array, String, TypedArray]) {
+	Object.defineProperty(C.prototype, "at",
+		{ value: at,
+			writable: true,
+			enumerable: false,
+			configurable: true });
+}