BUG: Don't loop over objects with a for in loop

[ashercoren]

Version: 0.16.22

Are you able to reproduce the bug from the demo?

[-] Yes
[ ] No

What is the expected behavior?
Looping over objects should be done using Object.keys.forEach..., and not with a for-in loop.

Looping over objects with a for in loop will include properties that are inherited through the prototype chain. This behavior can lead to unexpected items in your for loop.
More details can be found here.

Are you able to attach screenshots, screencasts or a live demo?

[ ] Yes (attach)
[-] No

[ashercoren]

This caused a bug in our application since we are using some package that adds properties to the object prototype.
When trying to initialize a grapes.js editor we get an error in the console.