main repo

node_modules/is-arguments/index.js

@@ -0,0 +1,33 @@
+'use strict';
+
+var hasToStringTag = require('has-tostringtag/shams')();
+var callBound = require('call-bind/callBound');
+
+var $toString = callBound('Object.prototype.toString');
+
+var isStandardArguments = function isArguments(value) {
+	if (hasToStringTag && value && typeof value === 'object' && Symbol.toStringTag in value) {
+		return false;
+	}
+	return $toString(value) === '[object Arguments]';
+};
+
+var isLegacyArguments = function isArguments(value) {
+	if (isStandardArguments(value)) {
+		return true;
+	}
+	return value !== null &&
+		typeof value === 'object' &&
+		typeof value.length === 'number' &&
+		value.length >= 0 &&
+		$toString(value) !== '[object Array]' &&
+		$toString(value.callee) === '[object Function]';
+};
+
+var supportsStandardArguments = (function () {
+	return isStandardArguments(arguments);
+}());
+
+isStandardArguments.isLegacyArguments = isLegacyArguments; // for tests
+
+module.exports = supportsStandardArguments ? isStandardArguments : isLegacyArguments;