/* 金額格式化，加逗號 */
  function moneyFormat01(value, point) {
    point = point > 0 && point <= 20 ? point : 2;
    value =
      parseFloat((value + "").replace(/[^\d\.-]/g, "")).toFixed(point) + "";
    var valStr = value.split(".")[0].split("").reverse();
    var pointBehind = value.split(".")[1];
    
 
var beforePoint = "";
    for (let i = 0; i < valStr.length; i++) {
      beforePoint +=
        valStr[i] + ((i + 1) % 3 == 0 && i + 1 != valStr.length ? "," : "");
    }
    return beforePoint.split("").reverse().join("") + "." + pointBehind;
  }
  console.log(moneyFormat01(-11123.909, 2), "數字金額化");

  
 
/* 格式化金額  加千分位，保留相應小數 */
  function moneyFormat02(vlaue, point) {
    if (vlaue != ".") {
      let fff = Math.round(vlaue * 100) / 100;
      var s = fff.toString();
      let rs = s.indexOf(".");
      if (rs <= 0) {
        rs = s.length;
        s += ".";
      }
      while (s.length <= rs + point) {
        s 
 
+= 0;
      }
    } else {
      let s = "0.00";
    }
    let pointBefore = "";
    if (s.substr(0, 1) == "-") {
      s = s.substr(1);
      pointBefore = "-";
    }
    let arr = s.split(".");
    let before01 = arr[0];
    let result = "",
      number = 0;
    before01 = (before01 || 0).toString();
    for (let i = before01.length - 1; i >= 0; i--) {
      number++;
      result = before01.charAt(i) + result;
      if (!(number % 3) && i != 0) {
        result = "," + result;
      }
    }
    if (arr.len == 1) {
      return pointBefore + result;
    } else {
      return pointBefore + result + "." + arr[1];
    }
  }
  console.log(moneyFormat02(12567345.9089, 3), "金額格式化");