Feel free to let me know if you're interested in hearing more about a specific topic that I write about, I'd be more than happy to expand if people are interested!
Resources for developers, by developers.
It says it right in the tag line. The Mozilla Developer Network Web Docs (aka MDN) is a repository filled to the brim with indepth and up to date documentation and examples covering web technologies, including JS, CSS and HTML, along with substantial coverage of browser and DOM APIs. To give you an idea of how elaborate they are, just have a look at the overview.
I cannot understate how much of a useful and relevant resource this is for any developer. There are numerous examples present on each page, along with extensive cross-linking between to other relevant articles. It makes it painless to discover and understand any topic that you find yourself investigating.
I personally spend more time, and learn more from the docs, compared to other sites such as StackOverflow. Don't get me wrong, StackOverflow is an incredible resource and repository of knowledge which I use daily, but I've found if I want a deeper level of understanding and want to utilise what I've found in the future, MDN is the way to go.
I urge you to take the time have a look at MDN, learn how to use it to your advantage and to grow your knowledge and understanding as a developer. When you're Googling something, make an effort to scroll down an extra result or two do open the MDN page and get a thorough example and explaination. You won't regret it!