css underline transition code example
Example 1: add expanding underline on page load css
#sec {
display: inline-block;
position: relative;
padding-bottom: 3px;
}
#sec:after {
content: '';
display: block;
margin: auto;
height: 3px;
width: 0px;
background: transparent;
transition: width .5s ease, background-color .5s ease;
}
#sec:hover:after {
width: 100%;
background: blue;
}
Example 2: text decoration css transition
.un {
display: inline-block;
}
.un::after {
content: '';
width: 0px;
height: 1px;
display: block;
background: black;
transition: 300ms;
}
.un:hover::after {
width: 100%;
}