1. 首先建立filter 資料夾

2. wxs 程式碼

var numFr = {
  getNum: function (x) {
    var f = parseFloat(x);
    if (isNaN(f)) {
      return false;
    }
    var f = Math.round(x * 100) / 100;
    var s = f.toString();
    var rs = s.indexOf('.');
    if (rs < 0) {
      rs = s.length;
      s += '.';
    }
    while
 
 (s.length <= rs + 2) {
      s += '0';
    }
    return s;
  }
}

module.exports = {
  getNum: numFr.getNum
}

3. wxml 引入，應用

<wxs module="numFr" src="../../filter/numFr.wxs"></wxs>

{{numFr.getNum(billDetail.loanAmt)}}