整个匹配特定字符串

<div class="two">1111</div>
</body>
<script type="text/javascript">
  
  var x = '123;aaa=bbb23232;';
  var m ='aaa';
  var e = "(;|^)"+m+"=([^]*)(;|$)";
  // var e = "(^|;)"+m+"=([^]*)(;|$)";
  // var e = '[;]'+m+'=([\w]*)[;]';
  
  var reg=new RegExp(e);
  var res= x.match(reg);
  // console.log(reg.exec(x))
  console.log(RegExp.$2)
  console.log(res)
</script>
</html>