v1.0 with SW PWA enabled

frontend/node_modules/es-abstract/2025/StringLastIndexOf.js

@@ -0,0 +1,38 @@
+'use strict';
+
+var $TypeError = require('es-errors/type');
+
+var substring = require('./substring');
+
+var isInteger = require('../helpers/isInteger');
+
+// https://262.ecma-international.org/16.0/#sec-stringlastindexof
+
+module.exports = function StringLastIndexOf(string, searchValue, fromIndex) {
+	if (typeof string !== 'string') {
+		throw new $TypeError('Assertion failed: `string` must be a string');
+	}
+	if (typeof searchValue !== 'string') {
+		throw new $TypeError('Assertion failed: `searchValue` must be a string');
+	}
+	if (!isInteger(fromIndex) || fromIndex < 0) {
+		throw new $TypeError('Assertion failed: `fromIndex` must be a non-negative integer');
+	}
+
+	var len = string.length; // step 1
+
+	var searchLen = searchValue.length; // step 2
+
+	if (!((fromIndex + searchLen) <= len)) {
+		throw new $TypeError('Assertion failed: fromIndex + searchLen ≤ len'); // step 3
+	}
+
+	for (var i = fromIndex; i >= 0; i--) { // step 4
+		var candidate = substring(string, i, i + searchLen); // step 4.a
+		if (candidate === searchValue) {
+			return i; // step 4.b
+		}
+	}
+
+	return 'NOT-FOUND'; // step 5
+};