Object.defineProperty and debugger

object_define_property.js

// Nice trick when you don't know where a change comes from
// rewrites a property, and sets a debugger when the property changes

console = console || {}; // just in case

console.watch = function(oObj, sProp) {
   var sPrivateProp = "$_"+sProp+"_$"; // to minimize the name clash risk
   oObj[sPrivateProp] = oObj[sProp];

   // overwrite with accessor
   Object.defineProperty(oObj, sProp, {
       get: function () {
           return oObj[sPrivateProp];
       },

       set: function (value) {
           debugger; // <<<<<<<<<<< sets breakpoint, do whatever you want
           oObj[sPrivateProp] = value;
       }
   });
}

// ...
$scope.myObj = {value: 1}
console.watch($scope.myObj, 'value')