Angular is a powerful tool developed and maintained by Google for creating dynamic, single-page applications. One key strength of Angular is its powerful command-line interface (CLI), which provides developers with a plethora of commands to handle various development tasks. When developers run an Angular application, they often utilize the command ‘ng serve’. Today, we are going to discuss one customization aspect of this command – running ‘ng serve’ with a custom port.
Custom ports can be useful for several reasons. The default port that Angular uses when the ‘ng serve’ command is executed is ‘4200’, so if this port is already in use or restricted, we need to specify a different port. To do this, we attach the ‘–port’ flag and specify our desired port number.
ng serve --port 8080
This command will run the application on port ‘8080’ instead of the default ‘4200’.
The ‘ng serve’ Command Explained
Developers use ‘ng serve’ to spin up a local development server and serve the Angular application. The command performs several vital actions during the process:
- It compiles the Angular application into an output directory.
- It starts a development server and listens for any changes to your source files.
- After it notices a change, it recompiles the application and reloads the webpage.
Meanwhile, the ‘–port’ option tells the Angular CLI to run the ‘ng serve’ command on a specific port number, other than the default ‘4200’.
Understanding the Custom Port Concept
The Angular CLI is a very flexible tool, and it understands the need for customization during development. Developers can serve their applications on any available port by merely using the ‘–port’ switch, followed by the desired port number.
ng serve --port 3000
The code above will start the local development server on port ‘3000’. This feature proves to be exceedingly useful when running multiple Angular applications simultaneously, each on a different port.
Use Cases of Custom Ports
Customized ports are often used to overcome port conflicts, particularly during concurrent development projects. For instance, if you are working on multiple projects that all require separate development servers, using the ‘–port’ flag, you can effectively run all these applications concurrently on different ports.
To sum up, Angular CLI’s flexibility with the ‘ng serve’ command and the ‘–port’ option allows developers to modify their development environment according to their preferences and requirements. It is a powerful and versatile feature that contributes significantly to Angular’s overall efficiency and ease of use.