Object._watch

Object property watching using ECMAScript 5

Object.prototype.watch is a coming feature of ECMAScript 6.

But why wait?

How to Use

Local Watching

var w = new Watchable({a: 1});

console.log( w.a ); // Logs: 1

w._watch('a', function(property, oldValue, newValue){
    console.log(property, oldValue, newValue);
});

w.a = 'test'; // Logs: a 1 'test' / Returns: 'test'

w._unwatch('a');

w.a = 'test2'; // Returns: 'test2'

Remote Watching

var o = {x: 1};

var w = new Watchable();

w._watch('x', function(property, oldValue, newValue){
    console.log(property, oldValue, newValue);
}, null, o); // Note the 4th parameter

o.x = 2; // Logs: x 1 2 / Returns: 2