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ts-custom-error

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ts-custom-error

Extend native Error to create custom errors

  • 3.3.1
  • latest
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What is ts-custom-error?

The ts-custom-error package is a TypeScript library that simplifies the creation of custom error classes. It provides a base class that can be extended to create custom error types with minimal boilerplate code.

What are ts-custom-error's main functionalities?

Creating Custom Error Classes

This feature allows you to create custom error classes by extending the CustomError base class provided by ts-custom-error. The example demonstrates how to create a custom error class named MyCustomError and throw an instance of it.

class MyCustomError extends CustomError {
  constructor(message: string) {
    super(message);
    this.name = 'MyCustomError';
  }
}

try {
  throw new MyCustomError('Something went wrong!');
} catch (error) {
  console.error(error.name); // MyCustomError
  console.error(error.message); // Something went wrong!
}

Preserving Stack Trace

This feature ensures that the stack trace is preserved when custom errors are thrown. The example shows how the stack trace includes the function where the error was thrown, which aids in debugging.

class AnotherCustomError extends CustomError {
  constructor(message: string) {
    super(message);
    this.name = 'AnotherCustomError';
  }
}

function problematicFunction() {
  throw new AnotherCustomError('An error occurred in problematicFunction');
}

try {
  problematicFunction();
} catch (error) {
  console.error(error.stack); // Stack trace includes problematicFunction
}

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Package last updated on 01 Nov 2022

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