Javascript从字符串中删除子字符串的最后一次出现

function removeLastOccurrence(str, subStr) {
  var regex = new RegExp(subStr + "(?!.*" + subStr + ")");
  return str.replace(regex, "");
}

var str = "Hello World, Hello Universe, Hello Galaxy";
var subStr = "Hello";
var result = removeLastOccurrence(str, subStr);
console.log(result); // Output: Hello World, Hello Universe,  Galaxy

function removeLastOccurrence(str, subStr) {
  var lastIndex = str.lastIndexOf(subStr);
  if (lastIndex === -1) {
    return str;
  }
  return str.substring(0, lastIndex) + str.substring(lastIndex + subStr.length);
}

var str = "Hello World, Hello Universe, Hello Galaxy";
var subStr = "Hello";
var result = removeLastOccurrence(str, subStr);
console.log(result); // Output: Hello World, Hello Universe,  Galaxy