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make-error

1.3.6 • Public • Published

make-error

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Make your own error types!

Features

  • Compatible Node & browsers
  • instanceof support
  • error.name & error.stack support
  • compatible with CSP (i.e. no eval())

Installation

Node & Browserify/Webpack

Installation of the npm package:

> npm install --save make-error

Then require the package:

var makeError = require("make-error");

Browser

You can directly use the build provided at unpkg.com:

<script src="https://unpkg.com/make-error@1/dist/make-error.js"></script>

Usage

Basic named error

var CustomError = makeError("CustomError");
 
// Parameters are forwarded to the super class (here Error).
throw new CustomError("a message");

Advanced error class

function CustomError(customValue) {
  CustomError.super.call(this, "custom error message");
 
  this.customValue = customValue;
}
makeError(CustomError);
 
// Feel free to extend the prototype.
CustomError.prototype.myMethod = function CustomError$myMethod() {
  console.log("CustomError.myMethod (%s, %s)", this.code, this.message);
};
 
//-----
 
try {
  throw new CustomError(42);
} catch (error) {
  error.myMethod();
}

Specialized error

var SpecializedError = makeError("SpecializedError", CustomError);
 
throw new SpecializedError(42);

Inheritance

Best for ES2015+.

import { BaseError } from "make-error";
 
class CustomError extends BaseError {
  constructor() {
    super("custom error message");
  }
}

Related

Contributions

Contributions are very welcomed, either on the documentation or on the code.

You may:

  • report any issue you've encountered;
  • fork and create a pull request.

License

ISC © Julien Fontanet

Install

npm i make-error

DownloadsWeekly Downloads

6,814,871

Version

1.3.6

License

ISC

Unpacked Size

12.4 kB

Total Files

6

Last publish

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