JavaScript实现动态打字效果

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废话不多说，上代码~~

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

	<div id="text"></div>

</body>

<script>

  let divTyping = document.getElementById('text')

  let i = 0,

    timer = 0,

    str = '用JS实现动态打字效果'

  function typing () {

    if (i <= str.length) {

      divTyping.innerHTML = str.slice(0, i++) + '_'

      timer = setTimeout(typing, 200)

    }

    else {

      divTyping.innerHTML = str//结束打字,移除 _ 光标

      clearTimeout(timer)

    }

  }

  typing()

</script>

</html>