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Keyur Shah
Keyur Shah

Reputation: 536

Convert String (30-jul-2016) into Date(2016-07-30) using Javascript

I want to convert string in date format.

My String format is 30-Jul-2016 And want to convert into 2016-07-30. Only using javascript.

Upvotes: 3

Views: 331

Answers (6)

sz tech
sz tech

Reputation: 349

To be as dynamic as possible I advise to implement first Douglas Crockford's supplant function, and assign it to String Object's prototype (How can I do string interpolation in JavaScript?). Here's how you do it:

String.prototype.supplant = function (o) {
    return this.replace(/{([^{}]*)}/g,
        function (a, b) {
            var r = o[b];
            return typeof r === 'string' || typeof r === 'number' ? r : a;
        }
    );
};

After that, you can implement something like this:

function changeFormat(from, to){
    var months = [
      'Jan',
      'Feb',
      'Mar',
      'Apr',
      'May',
      'Jun',
      'Jul',
      'Aug',
      'Sep',
      'Oct',
      'Nov',
      'Dec'
    ];
    var date = new Date(from);
    return to.supplant({
        YYYY: date.getFullYear(),
        MMM: months[date.getMonth()],
        MM: date.getMonth()+1 > 9 ? date.getMonth()+1 : '0'+parseInt(date.getMonth()+1),
        DD: date.getDate() > 9 ? date.getDate() : '0' + parseInt(date.getDate())
    })
}

And this is how it would work: 

changeFormat("30-Jul-2016","{YYYY}-{MM}-{DD}") // 2016-07-30

Example:

String.prototype.supplant = function (o) {
    return this.replace(/{([^{}]*)}/g,
        function (a, b) {
            var r = o[b];
            return typeof r === 'string' || typeof r === 'number' ? r : a;
        }
    );
};

function changeFormat(from, to){
    var months = [
      'Jan',
      'Feb',
      'Mar',
      'Apr',
      'May',
      'Jun',
      'Jul',
      'Aug',
      'Sep',
      'Oct',
      'Nov',
      'Dec'
    ];
    var date = new Date(from);
    return to.supplant({
        YYYY: date.getFullYear(),
        MMM: months[date.getMonth()],
        MM: date.getMonth()+1 > 9 ? date.getMonth()+1 : '0'+parseInt(date.getMonth()+1),
        DD: date.getDate() > 9 ? date.getDate() : '0' + parseInt(date.getDate())
    })
}

console.log(changeFormat("30-Jul-2016","{YYYY}-{MM}-{DD}"));

Upvotes: 1

Yosvel Quintero
Yosvel Quintero

Reputation: 19070

var d = new Date('30-Jul-2016'.split('-').join(' ')),
    dFormated = d.getFullYear() + '-' + ('0' + (d.getMonth() + 1)).slice(-2) + '-' + d.getDate();

console.log(dFormated);

Upvotes: 0

Paarth
Paarth

Reputation: 590

Try this code

var date = '30-Jul-2016';
date = date.split('-').join(' ');
var d = new Date(date);
    dd = d.getDate();
      mm = d.getMonth() + 1;
      yyyy = d.getFullYear();

  dd = dd < 10 ? '0' + dd : dd;
  mm = mm < 10 ? '0' + mm : mm;
alert(yyyy + '-'+mm +'-'+ dd);

Upvotes: 0

rejo
rejo

Reputation: 3350

Try this

var date = '30-Jul-2016';
date = date.split('-').join(' ');
var d = new Date(date);
alert(d.getFullYear() + '-'+(d.getMonth()+1) +'-'+ d.getDate());
console.log(d.getFullYear() + '-'+(d.getMonth()+1) +'-'+ d.getDate());

Upvotes: 0

adeneo
adeneo

Reputation: 318212

Without a library, like Moment, the best way would be to keep an array of months to get the numerical values (there's no guarantee every browser will parse that date), and then just split the string and parse it

var months = [
  'Jan',
  'Feb',
  'Mar',
  'Apr',
  'May',
  'Jun',
  'Jul',
  'Aug',
  'Sep',
  'Oct',
  'Nov',
  'Dec'
];

function pad(x) {return x < 10 ? '0' + x : x}; // zero padding

var str   = "30-Jul-2016";
var parts = str.split('-');
var date  = new Date(parts[2], months.indexOf(parts[1]), parts[0]);

// now you can output whatever

var new_date = date.getFullYear() + '-' + pad(date.getMonth() + 1) + '-' + pad(date.getDate());

document.body.innerHTML = new_date;

Upvotes: 0

Andrey
Andrey

Reputation: 1553

Another way:

function formatDate(string) {
  var date = new Date(string),
      dd = date.getDate(),
      mm = date.getMonth() + 1,
      yyyy = date.getFullYear();

  dd = dd < 10 ? '0' + dd : dd;
  mm = mm < 10 ? '0' + mm : mm;

  return yyyy + '-' + mm + '-' + dd;
}

console.log(formatDate('30-Jul-2016')); // 2016-07-30

Upvotes: 0

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