Coding⏱️ 2 min read📅 2026-06-03

How to Fix: throw Error('msg') vs throw new Error('msg')

Understand the difference between Error() and new Error() in JavaScript.

Quick Answer: Error() is a factory function, while new Error() creates a new instance of the Error class.

The main difference between `throw Error('msg')` and `throw new Error('msg')` lies in their syntax and the context in which they are used.

🛑 Root Causes of the Error

  • When using the `Error` constructor in a function, it's generally recommended to use `new Error()` instead of just `Error()`. This is because `Error` is a global object that can be overridden or modified by other code.

    🛠️ Step-by-Step Verified Fixes

    Method 1: Using `new Error()`

    1. Step 1: When throwing an error, use the `new` keyword to create a new instance of the `Error` class.

    Method 2: Using a Constructor Function

    1. Step 1: Define a constructor function that returns an instance of the `Error` class.

    ✨ Wrapping Up

    By using `new Error()` or a constructor function, you can ensure that your error is properly created and thrown in the context of your code.

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