javascript - 替换字符串中的单词

我需要替换_New + Delivery一词；用逗号('，')组成的字符串中
样本输入字符串:XP_New+Delivery;HP_New+Delivery;LA_New;预期输出:XP,HP,LA_New;但是它返回的是与输出相同的输入，而不是替换任何主意吗？

function myFunction() {
  var str = document.getElementById("demo").innerHTML;
  var res = str.replace(new RegExp('_New+Delivery;', 'gi'), ',');
  document.getElementById("demo").innerHTML = res;
}

<p id="demo">XP_New+Delivery;HP_New+Delivery;LA_New;</p>

<button onclick="myFunction()">Try it</button>

最佳答案

试试这个:

var str = "XP_New+Delivery;HP_New+Delivery;LA_New;";
var res = str.replace(/(_New\+Delivery;)/g, ",");

console.log(res);