On caniuse, you can check browser support for the presence of tags / attributes / properties. Where can you check if they are missing?

Question

css

For example, how do I know if I omit the type="text/css" and type="application/javascript" attributes, my site will work fine in all browsers?

Answer 1

Here you probably don’t need canIuse, but reading the spec according to the html5 standard
https://www.w3.org/TR/html40/struct/links.html#ede...
https://www.w3.org/TR/html40 /present/styles.html
By the way, in HTML5 they are not required, everything else you can safely look at canIuse