what is$watch and $ digest

Question

Accepted Answer

The $watch and $digest are two important concepts in AngularJS for data binding and updating the view.

$watch is a function in AngularJS that allows you to watch for changes in a specific variable or expression.
$digest is a function in AngularJS that triggers a process called the digest cycle, which updates the bindings and synchronizes the model and view.
The $watch function takes two parameters: the variable or expression to watch and a callback function that gets executed when the value changes.
The $digest function is automatically called by AngularJS whenever an event occurs, such as a user interaction or a change in the model.
During the digest cycle, AngularJS checks all the $watch expressions and updates the view if any of them have changed.
Example: $scope.$watch('myVariable', function(newValue, oldValue) { ... });
Example: $scope.$digest();

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