<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta
name="viewport"
content="width=device-width, initial-scale=1.0"
>
<title>Document</title>
<style>
@keyframes move {
100% {
transform: translateX(300px);
}
}
:root {
--delay: 0s;
}
.ball {
width: 20px;
height: 20px;
border-radius: 50%;
background-color: tomato;
animation: move 2s var(--delay) linear;
animation-play-state: paused;
}
</style>
</head>
<body>
<div class="ball"></div>
<input
type="range"
min="0"
max="1"
step="0.01"
value="0"
>
<script>
const root = document.querySelector(":root")
const ipt = document.querySelector('input')
ipt.addEventListener('input', ev => {
root.style.setProperty('--delay', `${-ev.target.value * 2 + 0.00001}s`)
})
</script>
</body>
</html>
标签：动画,负值,--,delay,querySelector,ev,root,css From： https://www.cnblogs.com/fmg0224/p/18123925