Format date and time data function code in js_time and date

For example:
The existing string is:
var dt="2010-1-1 12:20:20";
Step 1: Convert it into date and time data

Copy code The code is as follows:

var newDt=new Date(dt.replace( "-","/"));

Step 2: Format the data into "yyyy-MM-dd"
(1) Extend Date

Copy code The code is as follows:

Date.prototype.format = function(format){
var o = {
"M " : this.getMonth() 1, //month
"d " : this.getDate(), //day
"h " : this.getHours(), //hour
"m " : this.getMinutes(), //minute
"s " : this.getSeconds(), //second
"q " : Math.floor((this.getMonth () 3)/3), //quarter
"S" : this.getMilliseconds() //millisecond
};
if(/(y )/.test(format)) {
format = format.replace(RegExp.$1, (this.getFullYear() "").substr(4 - RegExp.$1.length));
}
for(var k in o) {
if(new RegExp("(" k ")").test(format)) {
format = format.replace(RegExp.$1, RegExp.$1.length==1 ? o[k] : (" 00" o[k]).substr(("" o[k]).length));
}
}
return format;
};

(2) Use format to format the time

Copy code The code is as follows:

var fmtDt= newDt.format("yyyy-MM-dd");

The processing time in js is troublesome, not as fast as C#, just OK

Copy code The code is as follows:

var fmtDt=Convert.ToDateTime(dt).ToString("yyyy-MM-dd");