Is AngularJS frontend or backend?

AngularJS is an open-source, front-end framework that is primarily used to develop single-page web applications (SPAs) using JavaScript.

What are pipes in Angular?

Pipes are simple functions that can be used within template expressions to take in an input value and return a modified version of it.

What are promises in Angular?

A promise represents a value that may not be known at the time it is created, and the built-in $q service in AngularJS provides a way to work with promises.