[OceanSunfish]

> you wanna learn react and you never used an arrow function, wtf

At least in the early days, using React was the first time most people would be exposed to webpack/babel, so it was also their first exposure to the newer JS features.

[BiteCode_dev]

But you didn't need arrow functions at the time because createClass autobind this and you used methods. Now with extends and hooks, it would be a pain.

Besides, it's alright to learn es6 and 7 with react if you have time, but if your company pays a $10k react training in a 3 days session, you better have the pre-requisites right.

And at the very least, don't pretend to be "an expert" in 2019 if you don't know es6. Every tutorials for beginers include them now. Every docs of every libs use them.

You don't have to be an expert. It's legitimate. I don't advertise myself as a JS expert despite being pretty good at it.

But it looks better on the resume, and once you are hired on that assumption, you can't go back. Next time the company asks, you say expert again.

[tripzilch]

But they've been part of the ES standard for nearly 5 years now.