javascript - When writing a mobile page, there is always a blank space. What's going on?

Question

html css code

The h5 page I wrote has a large blank space during debugging, but when checking the elements, the html has not reached the bottom. All other elements have been checked, and the size and white space do not exceed this hmtl. That's why there is such a large blank space

Answer 1

I don’t understand what it means. Do you need this? HTML,body{min-height:100%;}

Answer 2

You set the height in front, it may be html, body or other p; if not, check the margins