Convert dd.mm.yyyy format to yyyy-mm-dd

Question

How can I convert dd.mm.yyyy format date to yyyy-mm-dd format in JavaScript?

Here is an example:

30.01.2010
to 
2010-01-30

Meaning

Answer 1

    function stringToDate( value ) {
      var isEuro = value.match( /^\d{1,2}\.\d{1,2}\.\d{4}$/ )
      var isIso = value.match( /^\d{4}-\d{1,2}-\d{1,2}$/ )

      if ( isEuro ) {
        value = value.split('.')
        value = [value[2],value[1],value[0]].join('-') //.reverse() isn't working in IEdge
        isIso = true
      }

      if ( isEuro || isIso ) {
        var date = new Date( value )
      }

      if ( isNaN( date.getTime() ) || !isIso ) {
         return false
      }


      return date
    }

    stringToDate('30.01.2000') //Sun Jan 30 2000 00:00:00 GMT+0100 (CET)
    stringToDate('30.1.2000') //Sun Jan 30 2000 01:00:00 GMT+0100 (CET)
    stringToDate('2000-01-30') //Sun Jan 30 2000 01:00:00 GMT+0100 (CET)
    stringToDate('2000-1-30') //Sun Jan 30 2000 01:00:00 GMT+0100 (CET)