Not in regards to W3Schools, but in regards to docs in general: i've found those of PHP to be excellent for one simple reason (regardless of what i think of the language).
They have user comments, which oftentimes contain the information and examples that are actually very important in day to day usage, as opposed to a cut and dry description by the language authors.
To me, it feels like most of the technologies out there could benefit from user source and user voted content at the bottom of pages like this, the one thing that IDEs also don't provide (though if one were to throw in some fuzzy search from, say, StackOverflow, we could probably get context surrounding a particular bit of code).
They have user comments, which oftentimes contain the information and examples that are actually very important in day to day usage, as opposed to a cut and dry description by the language authors.
For example, go to this page and scroll down to "User Contributed Notes": https://www.php.net/manual/en/function.str-replace.php
To me, it feels like most of the technologies out there could benefit from user source and user voted content at the bottom of pages like this, the one thing that IDEs also don't provide (though if one were to throw in some fuzzy search from, say, StackOverflow, we could probably get context surrounding a particular bit of code).