如何在jquery或javascript中递增字符串号？

var str = "001";
var num = parseInt(str);
num++;
str = num.toString().padStart(str.length, "0");
console.log(str); // 输出 "002"

var str = "001";
var arr = str.split("");
var lastIndex = arr.length - 1;
var i = lastIndex;
while (i >= 0) {
  if (arr[i] === "9") {
    arr[i] = "0";
    i--;
  } else {
    arr[i] = String.fromCharCode(arr[i].charCodeAt(0) + 1);
    break;
  }
}
str = arr.join("");
console.log(str); // 输出 "002"

var str = "001";
var num = parseInt(str.match(/\d+/)[0]);
num++;
str = str.replace(/\d+/, num.toString().padStart(str.match(/\d+/)[0].length, "0"));
console.log(str); // 输出 "002"