“Height=100%” is not working in html when using <!DOCTYPE>?

Question

When I use HTML without DOCTYPE, my HTML page Height=100% is working.

But when I use DOCTYPE, height is not working correctly.

Answer 1

When you state 'height=100%' you have to think "100% of what?". It's the parent of that table element which is the body. But how tall is the body?

To do what you want, add this in the CSS: html,body{height:100%}