CSS Property: border-bottom-width

The border-bottom-width property sets the width of the bottom border of an element.

EXAMPLE

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>border-bottom-width</title>
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">

    <style>
        * {
            box-sizing: border-box;
        }
        div {
            width: auto;
            padding: 10px;
            font-size: 24px;
        }
        div.a {
            display: inline-block;
            width: auto;
            writing-mode: horizontal-tb;
            border-width: 8px;
            border-bottom-color: blue;
            border-bottom-style: double;
        }
        div.b {
            writing-mode: vertical-lr;
            border-width: 16px;
            border-bottom-color: green;
            border-bottom-style: dashed;
        }
        div.c {
            writing-mode: vertical-rl;
            border-width: 14px;
            border-bottom-color: red;
            border-bottom-style: dotted;
        }
        div.d {
            writing-mode: sideways-rl;
            border-width: 10px;
            border-bottom-color: orange;
            border-bottom-style: solid;
        }
        div.e {
            writing-mode: sideways-lr;
            border-width: 28px;
            border-bottom-color: deepskyblue;
            border-bottom-style: dotted;
        }
    </style>
</head>
<body>
<div class="a">writing-mode: horizontal-tb;</div>
<div class="b">writing-mode: vertical-lr;</div>
<div class="c">writing-mode: vertical-rl;</div>
<div class="d">writing-mode: sideways-rl;</div>
<div class="e">writing-mode: sideways-lr;</div>
</body>
</html>

RESULT