How to Chain Exceptions in JavaScript Similar to Java's Throwable Causes?

How can you chain exceptions in JavaScript to include a cause, similar to Java's throwable functionalities?

try {
    // Some code that may throw an error
} catch (err) {
    throw new Error('New error message', { causedBy: err });
}

JavaScript allows for exception handling through try-catch blocks. However, unlike Java, it does not natively support chaining exceptions with additional context. Here’s how to implement exception chaining safely and effectively in JavaScript.

class CustomError extends Error {
    constructor(message, cause) {
        super(message);
        this.cause = cause;
        this.name = this.constructor.name;
    }
}

try {
    // Some code that may throw an error
} catch (err) {
    throw new CustomError('New error occurred', err);
}

Causes

• Lack of built-in support for chaining exceptions in JavaScript.
• Developer oversight in handling errors adequately.

Solutions

• Use the `Error` constructor effectively to create new error types with a `causedBy` property.
• Utilize custom error classes to encapsulate additional information about the error cause.

Mistake: Not passing the original error when creating a new error.

Solution: Always include the original error in the new error context to maintain the stack trace.

Mistake: Failing to create custom error objects properly.

Solution: Utilize custom error classes and extend the built-in Error class.