tags: js

categories: js

JS数字格式转换为千分位

不使用正则表达式

  2. var num = 123456789;
  3. 1.格式化为千分位输出 num.toLocaleString()
  4. //"123,456,789"
  5. 2.格式化为千分位带$符号输出
  6. num.toLocaleString("en-US",{style:"currency",currency:"USD"})
  7. //"$123,456,789.00"
  8. 3.格式化为带￥符号输出
  9. num.toLocaleString("zh-Hans-CN",{style:"currency",currency:"CNY"})
  10. //"￥123,456,789.00"

使用正则表达式

  2. // 数字转换成货币格式 封装
  3.     // number 数字
  4.     // places 小数位
  5.     // sybol 货币前缀
  6.     // thousand 货币以什么分割
  7.     // decimal 以什么跟小数分割
  8.     // formatMoney(value, 2, "￥", ",", ".")
  9.   const formatMoney = function (number, places, symbol, thousand, decimal) {
  10.     places = !isNaN(places = Math.abs(places)) ? places : 2;
  11.     symbol = symbol !== undefined ? symbol : "￥";
  12.     thousand = thousand || ",";
  13.     decimal = decimal || ".";
  15.     if(number){
  16.       var negative = number < 0 ? "-" : "",
  17.       i = parseInt(number = Math.abs(+number || 0).toFixed(places), 10) + "",
  18.       j = (j = i.length) > 3 ? j % 3 : 0;
  19.       return symbol + negative + (j ? i.substr(0, j) + thousand : "") + i.substr(j).replace(/(\d{3})(?=\d)/g, "$1" + thousand) + (places ? decimal + (Math.abs(number - i).toFixed(places) + "").slice(2) : "");
  20.     }else{
  21.       return symbol + parseFloat(0).toFixed(places)
  22.     }
  23.   }