Tech blogs and sites are mostly useless. There are good places MDN, official docs sites (when they aren't written by Google that is). But there is so much just machine generated, or amateur 3rd world generated trash out there that its difficult. Front end development is much worse than other areas with this.

This summer I had a lot of trouble finding information for something specific in Angular on how to do some specific thing, where the official docs didn't cover it in depth enough, and then searching for it online was impossible as it was thousands of "blogs" with the same copy pasted tutorial with a few key words changed around that show the same hello world example.