<!DOCTYPE html>
<html>
<body>
<h2>JavaScript 字符串搜索</h2>
<p>在字符串中搜索 "ain"：</p>
<p id="demo"></p>
<script>
let text = "The rain in SPAIN stays mainly in the plain";
document.getElementById("demo").innerHTML = text.match(/ain/g);
</script>
</body>
</html>