A watch means that AngularJS watches changes in the variable on the $scope object. The framework is “watching” the variable. … This function iterates through all watches and checks if any of the watched variables have changed. If a watched variable has changed, a corresponding listener function is called.

What is the use of watch in AngularJS?

In angularjs $watch() function is used to watch the changes of variables in $scope object. Generally the $watch() function will create internally in angularjs to handle variable changes in application.

Why is AngularJS bad?

Firstly, since the framework is overcomplicated, not many developers really know it well and it is hard to find such developers is very hard. Secondly, server developers won’t understand what is going on front-end and won’t be able to read the code at all.