The official documentation website states an older minimum requirement for the NodeJS version - 6.0.0, while GitHub states 8.0.0 as the minimum.

Cause the wiki defaults to stable (11.2)
Github defaults to master (12.0)
Master needs node 8+
11.2 needs node 6+
for posterity:

Well, some info about that on the main page would be nice though. I spent the last 2 days trying to figure out why I can't get audio output to work - updated node to 8.0.0+ and it's working now.
Switching branches on the docs works, as mentioned above.
But additionally there is also an issue open about it #1386.
I'm not going to say you wasted 48h "trying" to find info about it, but it was pretty much in front of your eyes. Also considering if you go to the repo itself via https://github.com/hydrabolt/discord.js and just scroll a "bit" down, you can see it too.
We aren't going to put it on the stable docs though, it doesn't affect 11.2 at all, which is why it shouldn't be on there.
I just kinda expected to have something like a newer node version documented in the documentation, if it's required for the features documented there to work properly.
Since - as I mentioned - the audio playback, for which I used the documentation , only worked after updating node, which was in turn not mentioned in that documentation but somewhere on github. Just to make clear how confusing this can be...
It is mentioned in the documentation.
You were simply on the wrong branch. If you go here https://discord.js.org/#/docs/main/master/general/welcome
You can see that it is correctly showing. Master/v12/Indev is a development version, it won't show up as the "first" thing when you visit the docs because the majority of people use stable, since as the name implies it, it's stable.
@iCrawl Thanks! Got it.
Oh, I'm not even using v12 btw. I'm using v11.2, which - apparently - only needs Node v6, however it only worked properly after updating node to v8...