Question

How to debug Angular code?

I’m working with Angular and finding it tough to debug my code when things go wrong. Besides using console.log, are there better tools or methods for debugging Angular applications? Are there specific Chrome DevTools extensions or Angular CLI commands that could help? Any tips on where to start for efficient debugging in Angular?

Answer 1

Debugging Angular code can be done effectively through both browser developer tools and Angular-specific tools. Here’s a guide on the best techniques:

1. Use Console Logs

• Add console.log() statements to inspect component data, variables, or lifecycle hooks.

• Useful for quick checks, though not ideal for complex debugging since excessive logging can clutter the console.

2. Browser Developer Tools

• Open Chrome DevTools (F12 or Ctrl+Shift+I) to access the Console, Network, and Elements tabs.

• Inspect elements, check component states, and monitor network requests (especially for REST APIs).

3. Angular DevTools Extension

• Install the Angular DevTools extension for Chrome, which provides Angular-specific debugging options.

• This tool allows you to:

  • Inspect the component tree, showing the structure of all components in your app.

  • View and edit the state of components and services.

  • Track change detection cycles to identify performance issues.