<html><body><h1>JavaScript 正则表达式</h1><p>对字符串中每行开头的 "is" 进行全局、不区分大小写的多行搜索：</p><p id="demo"></p><script>let text = `Is thisall thereis`let pattern = /^is/gmi;let result = text.match(pattern);document.getElementById("demo").innerHTML = result;</script></body></html>