how to set a page in html so that it fills the full screen?

Question

I am designing a calculator android app using html css and js! when I convert the html page to apk it doesn't covers the whole screen... what should I do to solve this problem with no knowledge of java and android language?

Answer 1

Perhaps CSS:

body {
width:100vw;
height:100vh;
top:0;
left:0;
}

Answer 2

html,body {
width:100%;
height:100%;
}