console 命令行工具 X clear

console

function throttle(fn, s, duration) {
  let timer
  let beginTime = new Date()
  
  return function() {
    let _this = this
    let args = arguments
    let now = new Date()
    clearTimeout(timer)
    if(now - beginTime > duration) {
      fn.apply(_this, args)
      beginTime = now
    } else {
      timer = setTimeout(() => {
        fn.apply(_this, args)
      }, s)
    }
  }
}

function scrollFn() {
  console.log('检测到滚动事件')
}

window.onscroll = throttle(scrollFn, 500, 1000)

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8" />
  <title>Document</title>
</head>
<body>
  <div style="background-color: lightblue; height: 200vh;"></div>
</body>
</html>