[viviansolide]

Thanks for sharing. I found this quote very appropriated:

In older scripts, you may also find another keyword: var instead of let

[Rumudiez]

True for reading legacy JS. For newer code, you can still identify noobies (and "experts") by the conspicuous usage of let instead of const.

[reificator]

While I certainly prefer immutability there are many who do not, and that preference does not make you better or more experienced than them.