JSON.stringify 未序列化扩展类道具

发布于 2025-01-11 07:25:02 字数 600 浏览 0 评论 0原文

我在字符串化 JavaScript 扩展类时遇到问题。首先，我创建 MyError 类作为 Error 的扩展，然后在 MyError 的新实例上尝试 JSON.stringify。

我希望看到继承的 (Error) 类的 .message 属性，但 stringify 仅序列化 MyError 类的直接属性。请参阅下面的代码和输出。

有没有办法告诉 stringify 包含 Error.message？或者有一个简单的解决方法来实现这一目标？

class MyError extends Error {
  constructor(message, hint = "") {
    super(message);
    this.message = message; // attempt to trick .stringify
    this.hint = hint;
  }
}

console.log(JSON.stringify(new MyError("hello world");));

实际输出：{"hint":""}

期望输出：{"message":"hello world","hint":""}

原文

I have an issue stringifying JavaScript extended class. First, I create MyError class as extension of Error and then try JSON.stringify on a new instance of MyError.

I expect to see .message property of the inherited (Error) class, but stringify only serializes direct attributes of MyError class. See code and output below.

Is there a way to tell stringify to include Error.message? Or an easy workaround to achieve this?

class MyError extends Error {
  constructor(message, hint = "") {
    super(message);
    this.message = message; // attempt to trick .stringify
    this.hint = hint;
  }
}

console.log(JSON.stringify(new MyError("hello world");));

Actual output: {"hint":""}

Desired output: {"message":"hello world","hint":""}

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