margin css
/* Apply to all four sides */
margin: 1em;
margin: -3px;
/* vertical | horizontal */
margin: 5% auto;
/* top | horizontal | bottom */
margin: 1em auto 2em;
/* top | right | bottom | left */
margin: 2px 1em 0 auto;
/* Global values */
margin: inherit;
margin: initial;
margin: unset;why there's a default margin in html <body>
body {
margin: 0px;
padding: 0px;
...
}css my body have margin top
You probably have an element with margin-top as one of the first children of body.
Read up on collapsing margins.
Purely as a simple test, set padding: 1px on body. If the gap goes away, I'm right.
/*
from stackoverflow.com ->
css & html5: why does my body have a spacing at the top
*/Copyright © 2021 Codeinu
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