object.observe

I have been experimenting with Object.observe in Chrome v36. My original intent was to use this for business logic in my models, but the asynchronous behaviour seems to make this impossible. I have boiled this down to the following example: function Person(name) { this.name = name; this.someOtherProperty = null; this.watch = function() { var self = this; Object.observe(this, function(changes){ for(var i = 0; i < changes.length; i++) { if(changes[i].name == "name") { self.someOtherProperty = changes[i].newValue; console.log("Property Changed"); } } }); } } $(function () { var p = new Person(

I have this function that works in Chrome, which prints to the console when a variable called finishedLoading changes values. Object.observe(finishedLoading, function(id, oldval, newval) { console.log('finished loading' + id + ' went from ' + oldval + ' to ' + newval); } This doesn't work in a bunch of other modern browsers (e.g. firefox, safari). Is there an alternative I can use that would be better supported? Thanks! A more widely supported approach could be Object.defineProperty . defineProperty can be used to have some control on a certain property of an object for instance: var o = {

For security purposes, I have a need for a "mirrored" object. i.e. if I create object A, and shallow-clone a copy of A and call it B, whenever a property of A changes, I hope to have B automatically update itself to reflect the changes, but not the other way around. In other words, one-way property syncing. My question: is there already a solution out in the wild that I'm not aware of? Was thinking of implementing a library with observe-js ( https://github.com/polymer/observe-js ), but thought I should ask around before proceeding. Thanks. Assuming you don't need to support IE8 and earlier,

Which browsers, if any, support Object.observe ? I'm surprised I'm unable to find any info on this. (And are you aware about any estimated times of arrival for this feature?) About Object.observe: "Object.observe allows for the direct observation of changes to ECMAScript objects. It allows an observer to receive a time-ordered sequence of change records which describe the set of changes which took place to the set of observed objects." — see ecmascript.org , the Solution section.) Edit November 2015: Apparently Object.observe has been cancelled: http://www.infoq.com/news/2015/11/object-observe