js 格式化时间

		function formatDate(date, format) {   
             if (!date) return;   
             if (!format) format = "yyyy-MM-dd";   
             switch(typeof date) {   
                 case "string":   
                     date = new Date(date.replace(/-/, "/"));   
                     break;   
                 case "number":   
                     date = new Date(date);   
                     break;   
             }    
             if (!date instanceof Date) return;   
             var dict = {   
                 "yyyy": date.getFullYear(),   
                 "M": date.getMonth() + 1,   
                 "d": date.getDate(),   
                 "H": date.getHours(),   
                 "m": date.getMinutes(),   
                 "s": date.getSeconds(),   
                 "MM": ("" + (date.getMonth() + 101)).substr(1),   
                 "dd": ("" + (date.getDate() + 100)).substr(1),   
                 "HH": ("" + (date.getHours() + 100)).substr(1),   
                 "mm": ("" + (date.getMinutes() + 100)).substr(1),   
                 "ss": ("" + (date.getSeconds() + 100)).substr(1)   
             };       
             return format.replace(/(yyyy|MM?|dd?|HH?|ss?|mm?)/g, function() {   
                 return dict[arguments[0]];   
             });                   
         }

	$(function(){
    	alert(formatDate("2019-08-07 10:59:00", "HH:mm:ss"));   
    	alert(formatDate("2019-08-07 10:59:00", "yyyy-MM-dd HH:mm:ss")); 
    });