myApp.directive('price', function($parse) { return {  link: function (scope, element, attrs, ctrl) {    //控制輸入框只能輸入數字和小數點    function limit(){      var limitV=element[0].value;      limitV=limitV.replace(/[^0-9.]/g,"");      //處理0開頭的整數      if ((/^0+[0-9]+$/).test(limitV)) {        limitV=limitV.replace(//b(0+)/gi,"");      }      //限定小數點后的位數      var digits = attrs['digits']?Number(attrs['digits']):2;      if (limitV*Math.pow(10,digits)%1!=0) {        var index = limitV.indexOf('.');        var last = index+digits+1;        limitV = (""+limitV).substring(0,last);      }      element[0].value=limitV;      $parse(attrs['ngModel']).assign(scope, limitV);      format();    }    //對輸入數字的整數部分插入千位分隔符    function format(){      var formatV=element[0].value;      var array=new Array();      array=formatV.split(".");      var re=/(-?/d+)(/d{3})/;      while(re.test(array[0])){        array[0]=array[0].replace(re,"$1,$2")      }      var returnV=array[0];      for(var i=1;i<array.length;i++){        returnV+="."+array[i];      }      element[0].value=returnV;      $parse(attrs['ngModel']).assign(scope, formatV);    }    scope.$watch(attrs.ngModel,function(){      limit();    })  } };})

<input ng-model="money" price digits="1"/>