trace-error

TraceError

npm install trace-error --save

import TraceError from 'trace-error';

global.TraceError = TraceError; // expose globally (optional)

(async () => {
  try {
    await fetch('google.com');
  } catch(e) {
    console.error(new TraceError('Failed to fetch content', e));
  }
})();

Output

TraceError: Failed to fetch content
    at _construct (.../TraceError.js/dist/Exception.js:35:393)
    at TraceError.Exception (.../TraceError.js/dist/Exception.js:110:17)
    at new TraceError (.../TraceError.js/dist/TraceError.js:186:74)
    at .../TraceError.js/tests/throw-test.js:159:19
    at Object.<anonymous> (.../TraceError.js/tests/throw-test.js:161:3)
    ReferenceError: fetch is not defined
        at .../TraceError.js/tests/throw-test.js:157:5
        at Object.<anonymous> (.../TraceError.js/tests/throw-test.js:161:3)
        at Module._compile (internal/modules/cjs/loader.js:689:30)
        at Object.Module._extensions..js (internal/modules/cjs/loader.js:700:10)
        at Module.load (internal/modules/cjs/loader.js:599:32)

Compatibility

Node >= 4.0; not tested on browsers

Functions

TraceError#cause(index = 0)

Get the cause at the specified index

TraceError#causes()

Get a list of all the causes

TraceError@stack

Get the long stack (base error with chained cause errors)

TraceError@messages

Get a list of all the messages

static TraceError@globalStackProperty

Attribute used to aggregate the long stack. Can be further customized via. inheritance and/or prototype modification

static TraceError@indent

Spaces used to indent long stack

More Detailed Examples

More detailed examples are in the /tests folder

ES5/6 Cross-compatibility

Extend the TraceError as such in order to maximize compatibility with ES5; additionally, override the toJSON as necessary

export class MyAppTraceError extends TraceError {
  constructor(...args) {
    super(...args);

    // not ideal
    Object.defineProperty(this, 'stack', {
      get: () => super.stack
    });
  }
}