1.函數getIntv延都，獲取從當前時間到指定日期的間隔時間
function getIntv(timeString){
var now=new Date();
var target=new Date(timeString);
var gap=(target-now)/1000;
var day=parseInt(gap/3600/24);
var hour=parseInt(gap/3600%24);
var minute=parseInt(gap/60%60);
var second=parseInt(gap%60);
return "距"+timeString+"還有"+day+"天"+hour+"小時"+minute+"分鐘"+second+"秒"
}
var str = getIntv("2017-01-08");
console.log(str);
2.數字日期轉化為中文日期
var chStr=["零","一","二","三","四","五","六","七","八","九","十", "十一", "十二", "十三", "十四", "十五", "十六", "十七", "十八", "十九", "二十", "二十一", "二十二", "二十三", "二十四", "二十五", "二十六", "二十七", "二十八", "二十九", "三十", "三十一"]
function getChsDate(timeStr){
var time=new Date(timeStr);
var year =time.getFullYear()+"";
var month=time.getMonth()+1+"";
var date=time.getDate()+"";
return chStr[year[0]]+chStr[year[1]]+chStr[year[2]]+chStr[year[3]]+"年"+chStr[month]+"月"+chStr[date]+"日";
}
var str = getChsDate('2015-01-08');
console.log(str);
3.獲取N天前的日期
function getLastNDays(num){
var now=Date.now();
var distance=new Date(now-num*24*3600*1000);
var year=distance.getFullYear();
var month=distance.getMonth()+1;
var day=distance.getDate();
var getd=year+"-"+month+"-"+day;
return getd;
}
var lastWeek = getLastNDays(7); // ‘2016-01-08’
var lastMonth = getLastNDays(30); //'2015-12-15'
4.計算一個程序的執(zhí)行時間
var Runtime = (function(){
var startTime,endTime,getTime;
var obj = {
start: function(){
startTime=Date.now();
},
end: function(){
endTime=Date.now();
},
get: function(){
return getTime=endTime-startTime;
}
};
return obj;
}());
Runtime.start();
for(var i=0;i<10000;i++){
console.log();
}
Runtime.end();
console.log(Runtime.get());
