用JavaScript格式化日期

Question

I have to log my error with datetime in some file, for that I am using following code:

var dLogDate = new Date();
console.log(dLogDate.toString().substring(4) + ', ' + dLogDate.toGMTString().substring(4));

as per above code output comes as follows which is nice but not formated as I need:

"Oct 10 2014 12:48:59 GMT+0530 (IST),  10 Oct 2014 07:18:59 GMT"

I want result s follows :

"10 Oct 2014 12:48:59 (IST),  10 Oct 2014 07:18:59 (GMT)"

see date part before ",". I need 10 Oct instated of Oct 10

This can be done with some function which is substring first 4 character from string and concat at 3rd position again, But I am still curious to know if there are any other simple way to do this? I don't want to use any third party library/script.

Thanks.

Answer 1

You can use date functions to format date

http://www.w3schools.com/jsref/jsref_obj_date.asp

var monthIndex = date.getMonth();

var dayIndex = date.getDay();

var monthArray = ['January',....];

var dayArray = ['Sunday',...]

console.log(monthArray[monthIndex] + "-" + dayArray[dayIndex]);

Answer 2

You could try adding to the prototype an extension method toISTString

function pad(n) {
    return (n < 10) ? '0' + n : n;
}

Date.prototype.toISTString = function(locale) {
    var year = this.getFullYear().toString();
    var month = this.toLocaleString(locale, { month: "short" }) // ECMAScript Internationalization API, which is very new only available in Blink browsers (Chrome and Opera), IE11, and Firefox 29+.
    var day  = this.getDate().toString();
    var hrs = this.getHours().toString();
    var mins = this.getMinutes().toString();   
    var secs = this.getSeconds().toString();
    return day + " " + month + " " + year + " " + pad(hrs) + ":" + pad(mins) + ":" + secs + " (IST)";
};

dLogDate = new Date();
console.log(dLogDate.toISTString("en-us") + ', ' + dLogDate.toGMTString().substring(4));

JSFiddle