Why does the document type invalidate the css style? - Codes Helper - Programming Question Answer

Why does the document type invalidate the css style?

header declaration

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >

Why do some css styles fail?

after changing to html5 returned to normal.

Doctype css javascript html

Oct.26,2021

some styles do not conform to the DTD XHTML 1.0 Strict standard

Previous: Vue login is successful, cookie, is written in the background, but the corresponding cookie, cannot be viewed in Devtool because of cross-domain? Or is it written in the background?

Next: Find out the order, but does not contain some goods! As long as there is a non-conforming order, it will not be displayed?

Menu