What's wrong with Mozilla Developer Network HTML and CSS references?
https://developer.mozilla.org/en/HTML/Element https://developer.mozilla.org/en/CSS_Reference
Granted, the HTML reference doesn't have by attribute directory.
https://developer.mozilla.org/en/HTML/Element https://developer.mozilla.org/en/CSS_Reference
Granted, the HTML reference doesn't have by attribute directory.
- Working examples. W3Schools leads with them - Mozilla doesn't seem to have any.
- The 'try it yourself' feature. Nothing cements learning like playing around with the concepts for yourself.
compare the img entry for both: