2.9 KiB
2.9 KiB
Mouse cursor gradient tracking
A hover effect where the gradient follows the mouse cursor.
HTML
<button class="mouse-cursor-gradient-tracking">
<span>Hover me</span>
</button>
CSS
.mouse-cursor-gradient-tracking {
position: relative;
background: #2379f7;
padding: 0.5rem 1rem;
font-size: 1.2rem;
border: none;
color: white;
cursor: pointer;
outline: none;
overflow: hidden;
}
.mouse-cursor-gradient-tracking span {
position: relative;
}
.mouse-cursor-gradient-tracking::before {
--size: 0;
content: '';
position: absolute;
left: var(--x);
top: var(--y);
width: var(--size);
height: var(--size);
background: radial-gradient(circle closest-side, pink, transparent);
transform: translate(-50%, -50%);
transition: width .2s ease, height .2s ease;
}
.mouse-cursor-gradient-tracking:hover::before {
--size: 200px;
}
JavaScript
var btn = document.querySelector('.mouse-cursor-gradient-tracking')
btn.onmousemove = function (e) {
var x = e.pageX - btn.offsetLeft
var y = e.pageY - btn.offsetTop
btn.style.setProperty('--x', x + 'px')
btn.style.setProperty('--y', y + 'px')
}
Demo
Hover me
<style>
.snippet-demo__mouse-cursor-gradient-tracking {
position: relative;
background: #2379f7;
padding: 0.5rem 1rem;
font-size: 1.2rem;
border: none;
color: white;
cursor: pointer;
outline: none;
overflow: hidden;
}
.snippet-demo__mouse-cursor-gradient-tracking span {
position: relative;
}
.snippet-demo__mouse-cursor-gradient-tracking::before {
--size: 0;
content: '';
position: absolute;
left: var(--x);
top: var(--y);
width: var(--size);
height: var(--size);
background: radial-gradient(circle closest-side, aqua, rgba(0,255,255,0.0001));
transform: translate(-50%, -50%);
transition: width .2s ease, height .2s ease;
}
.snippet-demo__mouse-cursor-gradient-tracking:hover::before {
--size: 200px;
}
</style>
<script>
(function () {
var btn = document.querySelector('.snippet-demo__mouse-cursor-gradient-tracking')
btn.onmousemove = function (e) {
var x = e.pageX - btn.offsetLeft - btn.offsetParent.offsetLeft
var y = e.pageY - btn.offsetTop - btn.offsetParent.offsetTop
btn.style.setProperty('--x', x + 'px')
btn.style.setProperty('--y', y + 'px')
}
})()
</script>
Explanation
TODO
Note!
If the element's parent has a positioning context (position: relative), you will need to subtract
its offsets as well.
var x = e.pageX - btn.offsetLeft - btn.offsetParent.offsetLeft
var y = e.pageY - btn.offsetTop - btn.offsetParent.offsetTop
Browser support
Requires JavaScript
⚠️ Requires JavaScript.