Init. Map does not function and only working on backend at the moment.

node_modules/define-data-property/index.js

@@ -0,0 +1,56 @@
+'use strict';
+
+var $defineProperty = require('es-define-property');
+
+var $SyntaxError = require('es-errors/syntax');
+var $TypeError = require('es-errors/type');
+
+var gopd = require('gopd');
+
+/** @type {import('.')} */
+module.exports = function defineDataProperty(
+	obj,
+	property,
+	value
+) {
+	if (!obj || (typeof obj !== 'object' && typeof obj !== 'function')) {
+		throw new $TypeError('`obj` must be an object or a function`');
+	}
+	if (typeof property !== 'string' && typeof property !== 'symbol') {
+		throw new $TypeError('`property` must be a string or a symbol`');
+	}
+	if (arguments.length > 3 && typeof arguments[3] !== 'boolean' && arguments[3] !== null) {
+		throw new $TypeError('`nonEnumerable`, if provided, must be a boolean or null');
+	}
+	if (arguments.length > 4 && typeof arguments[4] !== 'boolean' && arguments[4] !== null) {
+		throw new $TypeError('`nonWritable`, if provided, must be a boolean or null');
+	}
+	if (arguments.length > 5 && typeof arguments[5] !== 'boolean' && arguments[5] !== null) {
+		throw new $TypeError('`nonConfigurable`, if provided, must be a boolean or null');
+	}
+	if (arguments.length > 6 && typeof arguments[6] !== 'boolean') {
+		throw new $TypeError('`loose`, if provided, must be a boolean');
+	}
+
+	var nonEnumerable = arguments.length > 3 ? arguments[3] : null;
+	var nonWritable = arguments.length > 4 ? arguments[4] : null;
+	var nonConfigurable = arguments.length > 5 ? arguments[5] : null;
+	var loose = arguments.length > 6 ? arguments[6] : false;
+
+	/* @type {false | TypedPropertyDescriptor<unknown>} */
+	var desc = !!gopd && gopd(obj, property);
+
+	if ($defineProperty) {
+		$defineProperty(obj, property, {
+			configurable: nonConfigurable === null && desc ? desc.configurable : !nonConfigurable,
+			enumerable: nonEnumerable === null && desc ? desc.enumerable : !nonEnumerable,
+			value: value,
+			writable: nonWritable === null && desc ? desc.writable : !nonWritable
+		});
+	} else if (loose || (!nonEnumerable && !nonWritable && !nonConfigurable)) {
+		// must fall back to [[Set]], and was not explicitly asked to make non-enumerable, non-writable, or non-configurable
+		obj[property] = value; // eslint-disable-line no-param-reassign
+	} else {
+		throw new $SyntaxError('This environment does not support defining a property as non-configurable, non-writable, or non-enumerable.');
+	}
+};