After the installation process finishes, run the following command while still in your workspace directory:

ng serve --open

The ng serve command launches the server, watches your files, and rebuilds the app as you make changes to those files.

The --open (or just -o) option automatically opens your browser to http://localhost:4200/.

Alternate command

npm start

Alias for ng serve --open.

If you are getting error messages that includes keywords like HEAP, JS stack tree, out of memory while trying to run ng serve --open or npm start commands, you may have an older Node.js version, try updating your Node.js to the latest LTS version and then try again.