Function addQueryStringValueToPath

docs/lib/ReactRouter.js:2368–2370

(path, key, value)

	}

	function addQueryStringValueToPath(path, key, value) {
	  return path + (path.indexOf('?') === -1 ? '?' : '&') + (key + '=' + value);
	}

	function stripQueryStringValueFromPath(path, key) {
	  return path.replace(new RegExp('[?&]?' + key + '=[a-zA-Z0-9]+'), '');