<!DOCTYPE html><html><head>
<meta charset="utf-8">
<title>JS animation</title>
<style>
*{ margin: 0; padding: 0; }
p{ background-color: green; width: 100px; height: 100px; }
</style></head><body><p id="p1"></p><script>
p1.style.position = 'absolute'
p1.style.left = 0
var n = 0
var id = setInterval( ()=> {
n = n + 5
p1.style.left = n + 'px'
if(n>100){
window.clearInterval(id)
}
},1000/24)</script></body></html> We know that due to visual retention, the combination of static images gives us the illusion of animation. Here I move this small square 24 times per second, 5px each time, using this illusion to make it look like it is moving slowly.
First set the style of p1 so that we can control its offset through left. The offset is controlled by n, which is always increasing.
Since the animation needs to be stopped, we use if judgment to clear the interval named id when n>100, so that it no longer works.
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