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    node-exceptions
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    4.0.1 • Public • Published

    Node Exceptions

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    Throwing errors in Javascript does not give much information about the error type as it is really hard to throw custom exceptions. Node Exceptions is a tiny wrapper which will let you extend the Error class and throw custom errors.

    Why custom errors

    Errors are thrown anywhere inside the code and handling them properly is required. For example you have an HTTP application, which can throw multiple errors and in order to handle those errors gracefully, you need to know the error types or their names.

    switch (err.name) {
      case 'HttpException':
        // do something
      case 'RunTimeException':
        // do something else
    }

    Install

    npm i --save node-exceptions

    Creating custom errors

    const NE = require('node-exceptions')
     
    class MyCustomError extends NE.LogicalException {}
     
    try {
      throw new MyCustomError('Something bad happened')
    } catch (e) {
      console.log(e.status) // equals 500
      console.log(e.name) // equals MyCustomError
      console.log(e.message) // Something bad happened
      console.log(e.stack) // Error stack with correct reference to filepath and linenum
      console.log(e.toString()) // MyCustomError: Something bad happened
    }

    Custom error status

    It is also possible to have a custom error status when throwing exceptions.

    const NE = require('node-exceptions')
     
    class HttpException extends NE.LogicalException {}
     
    try {
      throw new HttpException('Page not found', 404)
    } catch (e) {
      console.log(e.status) // equals 404
    }

    API Docs

    Access complete API Docs here

    Install

    npm i node-exceptions

    DownloadsWeekly Downloads

    24,484

    Version

    4.0.1

    License

    MIT

    Unpacked Size

    11.1 kB

    Total Files

    8

    Last publish

    Collaborators

    • virk