Closed Halibut80 closed 8 years ago
https://hacks.mozilla.org/2015/07/es6-in-depth-let-and-const/
Referrer https://blog.mozilla.org/addons/2015/10/14/breaking-changes-let-const-firefox-nightly-44/
https://hacks.mozilla.org/2015/07/es6-in-depth-let-and-const/