@bugsnag/js

Error Reporting

This feature allows you to report errors to Bugsnag. The code sample initializes Bugsnag with an API key and reports a test error.

const Bugsnag = require('@bugsnag/js');
Bugsnag.start({ apiKey: 'YOUR_API_KEY' });

try {
  throw new Error('Test error');
} catch (e) {
  Bugsnag.notify(e);
}

Breadcrumbs

Breadcrumbs are logs of user actions or application events that lead up to an error. This code sample shows how to leave a breadcrumb when a user clicks a button.

const Bugsnag = require('@bugsnag/js');
Bugsnag.start({ apiKey: 'YOUR_API_KEY' });

Bugsnag.leaveBreadcrumb('User clicked button', { buttonId: 'submit' });

Custom Metadata

You can add custom metadata to error reports for more context. This code sample demonstrates adding account information to an error report.

const Bugsnag = require('@bugsnag/js');
Bugsnag.start({ apiKey: 'YOUR_API_KEY' });

Bugsnag.notify(new Error('Test error'), event => {
  event.addMetadata('account', {
    id: 123,
    name: 'Acme Co'
  });
});

Session Tracking

Session tracking helps you understand the stability of your application by tracking user sessions. This code sample shows how to start a session.

const Bugsnag = require('@bugsnag/js');
Bugsnag.start({ apiKey: 'YOUR_API_KEY' });

Bugsnag.startSession();