代码如下
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<div class="box"></div>
<script>
let box = document.querySelector('.box')
let str = '今天天气真不错!适合出门玩耍!'
let i = 1
let timer = setInterval(() => {
console.log('回话中...');
box.innerHTML = str.slice(0, i)
i++
if (i >= str.length + 1) {
clearInterval(timer)
console.log('结束会话!!!');
}
}, 200)
</script>
</body>
</html>