Example 1: css rounded corners
/* Set rounded corners with border-radius property */
.class {
border-radius: 4px;
}
.circle {
border-radius: 50%;
}
Example 2: css curve table border
#rcorners {
border-radius: 25px;
}
Example 3: corner border css
<!DOCTYPE html>
<html lang="en" dir="ltr">
<head>
<meta charset="utf-8">
<title></title>
<style>
#content {
width: max-content;
height: fit-content;
background:
linear-gradient(to right, black 4px, transparent 4px) 0 0,
linear-gradient(to right, black 4px, transparent 4px) 0 100%,
linear-gradient(to left, black 4px, transparent 4px) 100% 0,
linear-gradient(to left, black 4px, transparent 4px) 100% 100%,
linear-gradient(to bottom, black 4px, transparent 4px) 0 0,
linear-gradient(to bottom, black 4px, transparent 4px) 100% 0,
linear-gradient(to top, black 4px, transparent 4px) 0 100%,
linear-gradient(to top, black 4px, transparent 4px) 100% 100%;
background-repeat: no-repeat;
background-size: 20px 20px;
}
</style>
</head>
<body>
<div id="content"> </div>
</body>
</html>
Example 4: css chamfered corner
div {
background: #c00;
/* fallback */
background: -moz-linear-gradient(45deg, transparent 10px, #c00 10px), -moz-linear-gradient(135deg, transparent 10px, #c00 10px), -moz-linear-gradient(225deg, transparent 10px, #c00 10px), -moz-linear-gradient(315deg, transparent 10px, #c00 10px);
background: -o-linear-gradient(45deg, transparent 10px, #c00 10px), -o-linear-gradient(135deg, transparent 10px, #c00 10px), -o-linear-gradient(225deg, transparent 10px, #c00 10px), -o-linear-gradient(315deg, transparent 10px, #c00 10px);
background: -webkit-linear-gradient(45deg, transparent 10px, #c00 10px), -webkit-linear-gradient(135deg, transparent 10px, #c00 10px), -webkit-linear-gradient(225deg, transparent 10px, #c00 10px), -webkit-linear-gradient(315deg, transparent 10px, #c00 10px);
}
div {
background-position: bottom left, bottom right, top right, top left;
-moz-background-size: 50% 50%;
-webkit-background-size: 50% 50%;
background-size: 50% 50%;
background-repeat: no-repeat;
}
/* Ignore the CSS from this point, it's just to make the demo more presentable */
div {
float: left;
width: 50px;
margin: 15px auto;
padding: 15px;
color: white;
line-height: 1.5;
}