I'm trying to make a navigation bar that overlap my header and stick to the top of the window on scroll.
It will start at top: 45px and stick at top: 0 on scroll.
My first approach was to set it at position: fixed; top: 45px and change the value with JS on a scroll event. But Firefox gave me the warning about "asynchronous panning" discussed on this post.
I have been able to do it with a bit of CSS trickery, but I am wondering if there is a simpler CSS way or a valid JS approach to do this (not throwing a warning).
body {
position: relative;
height: 100%;
width: 100%;
background-color: grey;
overflow-x: hidden;
margin: 0;
}
.container {
position: absolute;
top: 0;
left: -1px;
width: 1px;
bottom: 0;
padding-top: 45px;
overflow: visible;
}
nav {
position: sticky;
top: 0;
transform: translateX(-50%);
margin-left: 50vw;
width: 300px;
height: 70px;
background-color: red;
}
header {
height: 50vh;
background-color: blue;
}
main {
height: 200vh;
width: 100%;
background-color: green;
}<div class="container"><nav></nav></div><header></header><main></main>