For...in loops

[cwillinx]

In the code two times a for...in loop is used.

For...in also iterates over additional properties added to the array prototype.

I had an issue with this when using Micromodal in a 3rd party contect, where the array prototype got additional functions added. This let to a complete failure of the code.

[dkniffin]

@cwillinx Can you provide a codepen example that demonstrates this please? Here's a template you can base it on: Codepen example

[mike-vel]

This underlying problem is quite the same as #372. When Array.prototype is polluted, for...in iterates over additional properties, causing an error.