呼叫方式同date內建過濾

const angular = require('angular');
const MODULE_NAME = 'dateFilter';
const MODULE = angular.module(MODULE_NAME, []);

MODULE.filter("dateFilter", function($filter) {
    return function(input, format) {
        if(!isNaN(Number(input))&&String(input).length==8){
            let
 
 date = '';
            input = String(input);
            date += input.slice(0,4);
            date += '/';
            date += input.slice(4,6);
            date += '/';
            date += input.slice(6,8);

            var stamp = new Date(date).getTime();
            return $filter('date')(stamp,
 
format);
        }else {
            return '';
        }
    }
});

module.exports = MODULE_NAME;