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SyntaxError dan meros olish

O’rnatilgan SyntaxError klassidan meros oladigan FormatError klassini yarating.

U message, name va stack xususiyatlarini qo’llab-quvvatlashi kerak.

Foydalanish misoli:

let err = new FormatError("formatlash xatosi");

alert(err.message); // formatlash xatosi
alert(err.name); // FormatError
alert(err.stack); // stack

alert(err instanceof FormatError); // true
alert(err instanceof SyntaxError); // true (SyntaxError dan meros olganligi uchun)

Yechim

class FormatError extends SyntaxError {
  constructor(message) {
    super(message);
    this.name = "FormatError";
  }
}

// Test
let err = new FormatError("formatlash xatosi");

alert(err.message); // formatlash xatosi
alert(err.name); // FormatError
alert(err.stack); // stack (brauzerga bog'liq)

alert(err instanceof FormatError); // true
alert(err instanceof SyntaxError); // true
alert(err instanceof Error); // true

class FormatError extends SyntaxError {
  constructor(message) {
    super(message);
    this.name = this.constructor.name;
  }
}

let err = new FormatError("formatlashda xatolik");

alert(err.message); // formatlashda xatolik
alert(err.name); // FormatError
alert(err.stack); // stack

alert(err instanceof SyntaxError); // true

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