Prior to my first day I bought a book on ExtJS. I could not have succeeded at that position the way I did if not for the book, but still it contained at least one glaring mistake -- it referred to the configuration object literal used to create an ExtJS instance, as JSON.
Just within the past 7 days I started writing on dev.to again, after a hiatus stretching back to February. One of the more recent posts has to do with not blindly following the suggestions of known experts: https://dev.to/dexygen/linus-borg-s-nor-other-expert-s-advice-not-to-be-followed-blindly-1712
Well I'm seeing content in dev.to's beginners tag that is far more egregiously wrong than that ExtJS book about JSON, or LinusBorg about removing event listeners in Vue.js instances' destroyed hooks. Remember beginners, anybody can post anything on dev.to and unlike books for instance, it is not curated. Therefore I implore you, everything that you read targeting beginners on this platform, do so with a critical eye -- don't simply trust it to be correct.
Interestingly it is ironic that, the beginners being targeted are at the "don't know but know that they don't know" stage of their accrual of expertise, and that is why they are reading these articles, to try to learn more. But as long as the beginner's content is not curated (and I have now come to believe that it absolutely should be), you will have content authored by those who "don't know, and don't know that they don't know", which is at the previous, initial, stage.
There's even a term for "don't know and don't know that they don't know", Dunning-Kruger effect: https://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
The last two stages are "know but don't know that you know" and "know and know that you know". I like to think that depending on the technology involved I'm at the 2nd, 3rd or 4th step. Or that if I am at the 1st step, I can at least be disabused of my ignorance through logical argument. I suspect however that those suffering from the Dunning-Kruger effect probably cannot be persuaded.
Yet I digress. My main point is, to reiterate, that beginners need to read everything critically; research what you read and/or seek out clarification from other seeming experts.