Having a non-enumerable Array.prototype.contains may not be web-compatible

[Boris Zbarsky]

On 9/30/14, 4:29 PM, Rick Waldron wrote:
> This may be helpful:
> http://trends.builtwith.com/javascript/javascript-library

Rick, thank you!

This says 1.32% on top 10k sites, 3.05% on top 100k sites, 4.78% on top 
million sites, and 6.39% overall.

There's definitely been a recent dip in those numbers, of course.  Used 
to be even higher.

-Boris