give me the logsnag source code in javascript

To use Logsnag for capturing errors and exceptions in JavaScript environment, you can follow these steps:

1. Create a Logsnag account and obtain the API key.

2. Install the Logsnag package via your preferred package manager:

   NPM: npm install logsnag --save<br> Yarn: yarn add logsnag

3. Import and initialize Logsnag in your JavaScript code:

index.tsx
import logsnag from 'logsnag';

logsnag.init('YOUR-API-KEY-HERE');
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4. To log an error or exception, simply call logsnag.notify with the error object and optional metadata:

index.tsx
try {
  // Some code that may throw an error
} catch (error) {
  logsnag.notify(error, {
    user: {
      email: 'user@example.com',
      name: 'John Doe'
    },
    context: {
      page: window.location.href
    }
  });
}
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This will send the error to Logsnag servers along with any additional metadata you provide. You can then view and analyze these errors in your Logsnag dashboard.

Note: It is recommended to add Logsnag initialization and error handling logic in your application's entry point (e.g. index.js), so that any uncaught errors are captured properly.