add all frontend files

node_modules/es-abstract/2020/IterableToList.js

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+'use strict';
+
+var GetIterator = require('./GetIterator');
+var IteratorStep = require('./IteratorStep');
+var IteratorValue = require('./IteratorValue');
+
+// https://262.ecma-international.org/9.0/#sec-iterabletolist
+
+module.exports = function IterableToList(items, method) {
+	var iterator = GetIterator(items, 'sync', method);
+	var values = [];
+	var next = true;
+	while (next) {
+		next = IteratorStep(iterator);
+		if (next) {
+			var nextValue = IteratorValue(next);
+			values[values.length] = nextValue;
+		}
+	}
+	return values;
+};