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Convert dd-mm-yyyy string to date

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How do I convert a string to a date?

Using strptime() , date and time in string format can be converted to datetime type. The first parameter is the string and the second is the date time format specifier. One advantage of converting to date format is one can select the month or date or time individually.


Split on "-"

Parse the string into the parts you need:

var from = $("#datepicker").val().split("-")
var f = new Date(from[2], from[1] - 1, from[0])

Use regex

var date = new Date("15-05-2018".replace( /(\d{2})-(\d{2})-(\d{4})/, "$2/$1/$3"))

Why not use regex?

Because you know you'll be working on a string made up of three parts, separated by hyphens.

However, if you were looking for that same string within another string, regex would be the way to go.

Reuse

Because you're doing this more than once in your sample code, and maybe elsewhere in your code base, wrap it up in a function:

function toDate(dateStr) {
  var parts = dateStr.split("-")
  return new Date(parts[2], parts[1] - 1, parts[0])
}

Using as:

var from = $("#datepicker").val()
var to = $("#datepickertwo").val()
var f = toDate(from)
var t = toDate(to)

Or if you don't mind jQuery in your function:

function toDate(selector) {
  var from = $(selector).val().split("-")
  return new Date(from[2], from[1] - 1, from[0])
}

Using as:

var f = toDate("#datepicker")
var t = toDate("#datepickertwo")

Modern JavaScript

If you're able to use more modern JS, array destructuring is a nice touch also:

const toDate = (dateStr) => {
  const [day, month, year] = dateStr.split("-")
  return new Date(year, month - 1, day)
}

regular expression example:

new Date( "13-01-2011".replace( /(\d{2})-(\d{2})-(\d{4})/, "$2/$1/$3") );

Another possibility:

var from = "10-11-2011"; 
var numbers = from.match(/\d+/g); 
var date = new Date(numbers[2], numbers[0]-1, numbers[1]);

Match the digits and reorder them


Using moment.js example:

var from = '11-04-2017' // OR $("#datepicker").val();
var milliseconds = moment(from, "DD-MM-YYYY").format('x');
var f = new Date(milliseconds)

var from = $("#datepicker").val(); 
var f = $.datepicker.parseDate("d-m-Y", from);