<html><body><h1>JavaScript 正则表达式</h1><p>对字符串中的字符跨度 [a-h] 进行全局搜索：</p><p id="demo"></p><script>let text = "Is this all there is?";let pattern = /[a-h]/g;let result = text.match(pattern);document.getElementById("demo").innerHTML = result;</script></body></html>