I use MDN, not extensively though. I like this site, it is useful and very well organized, but feature availability (browser & level) is not as well documented

I use MDN, not extensively though. I like this site, it is useful and very well organized, but feature availability (browser & level) is not as well documented as in w3schools I find. Chrome is probably not the issue here, rather - let's name it - IE. MDN is a great site, don't misunderstand me - but in this case I am not sure this is the right hoster. I used MDN for some JavaScript issues like one year ago, and it was then running well on FF but not at all on IE. Maybe they have all corrected that since, but I'm not seeing that clearly now. dochub looks nice, but again it is not something for beginners. Also, MDN is client only (which is one point making me say it is very Mozilla oriented). w3schools has this part about PHP which is very useful for beginners. Again, my point hasn't changed. MDN and others are more useful resources to experienced web devs than w3schools, but w3schools is the better point to begin with when you don't know about web development and want a clear overview.