참고소스 수정본

참고/playwright-main/packages/isomorphic/rtti.ts

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+/**
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+export { isString } from  './stringUtils';
+
+export function isRegExp(obj: any): obj is RegExp {
+  return obj instanceof RegExp || Object.prototype.toString.call(obj) === '[object RegExp]';
+}
+
+export function isRegexString(value: string): boolean {
+  try {
+    new RegExp(value);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+export function isObject(obj: any): obj is NonNullable<object> {
+  return typeof obj === 'object' && obj !== null;
+}
+
+export function isError(obj: any): obj is Error {
+  return obj instanceof Error || (obj && Object.getPrototypeOf(obj)?.name === 'Error');
+}