how to make a header move and appear css code example
Example 1: how to scroll fixed position
.fixed-content {
top: 0;
bottom:0;
position:fixed;
overflow-y:scroll;
overflow-x:hidden;
}
Example 2: html how to ensure that the header always on top
#header {
position: fixed;
}
#content {
margin-top: 100px;
}