Listening for variable changes in JavaScript

Question

Is it possible to have an event in JS that fires when the value of a certain variable changes? JQuery is accepted.

Answer 1

AngularJS (I know this is not JQuery, but that might help. [Pure JS is good in theory only]):

$scope.$watch('data', function(newValue) { ..

where "data" is name of your variable in the scope.

There is a link to doc.