JavaScript中對日期格式化的新想法.

其實咱們對與日期的顯示,也就那麼幾種,不須要每次都傳格式化字符串.

只要告訴函數你想要什麼結果就行了,如下是在ios的JavaScript中我新寫的日期格式化函數:

 1 /**    
 2     格式化日期    
 3     @param {String} formatStr-格式化字符串    
 4     @description 
 5     "date":顯示日期.如:2017/09/09
 6     "time":顯示時間.如:15:09:05
 7     "minute":顯示到分鐘.如:2017/09/09 15:09
 8     "second"顯示到秒.如:2017/09/09 15:09:05
 9     @return {String} 格式化後的日期   
10 */
11 Date.prototype.format = function(formStr) {
12     var date = this;
13     var year,month,day,hour,minute,second;
14     var dateStr,minuteStr,secondStr;
15     
16     year=date.getFullYear(); month=date.getMonth()+1; day=date.getDate();
17     
18     dateStr=year+"/"+(month<10?"0"+month:month)+"/"+(day<10?"0"+day:day);
19     if(formStr=="date") return dateStr;
20     
21     hour=date.getHours(); minute=date.getMinutes(); second=date.getSeconds();
22     
23     minuteStr=(hour<10?"0"+hour:hour)+":"+(minute<10?"0"+minute:minute);
24     secondStr=minuteStr+":"+(second<10?"0"+second:second);
25     if(formStr=="time") return secondStr;
26     
27     if(formStr=="minute") return dateStr+" "+minuteStr;
28     
29     if(formStr=="second") return dateStr+" "+secondStr;
30 };

很low很實在.