How can I show the next month when my present month is Dec of any year ? - JavaScript

Question

Here is my Code. My question is how can I show the next month when my current month is Dec.

var monthNames = ['January','February','March','April','May','June','July','August','September','October','November','December'];

 console.log(monthNames[new Date().getMonth()].toString().substr(0, 3) + '-' + new Date().getFullYear().toString().substr(-2));

console.log(monthNames[new Date().getMonth()+1].toString().substr(0, 3) + '-' + new Date().getFullYear().toString().substr(-2));

 console.log(monthNames[new Date().getMonth()+2].toString().substr(0, 3) + '-' + new Date().getFullYear().toString().substr(-2));

  console.log(monthNames[new Date().getMonth()+3].toString().substr(0, 3) + '-' + new Date().getFullYear().toString().substr(-2));

 console.log('Suppose if the current month is Dec-19 then what should I do? It should return next line as Jan-20 but it is not doing so');

This is my JSFIDDLE Fiddle

If my month is Dec 17 or Dec 18 how can I show the next month ? I need a vanilla JS solution, no jQuery, no lodash, no 3rd party libraries.

add one to month in the date object... date object does the rest for you — Jaromanda X, Jan 10 '19 at 07:31
Possible duplicate of https://stackoverflow.com/questions/2706125/javascript-function-to-add-x-months-to-a-date — misorude, Jan 10 '19 at 07:33
have a look to the [reminder operator `%`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators#Remainder_()). just add an offset and take the result with the remainder operator with the length of the array. — Nina Scholz, Jan 10 '19 at 07:34
@Nina Scholz can you kindly show me ? I can't understand. If month is Dec 18 next month will be Jan 19. If current Month is Nov 18 , month + 2 should give me Jan 19 — tommy123, Jan 10 '19 at 07:47
`dateobject.setMonth(dateobject.getMonth() + 1)` - of course ... you're not doing that currently so that won't help much — Jaromanda X, Jan 10 '19 at 07:51
@Nina Scholz I can't get your point. I need to show month, next month, 2nd next month along with year. I don't need to show date and day — tommy123, Jan 10 '19 at 07:53
@JaromandaX how can I get year if my present month is Dec and I need to show month + 2 along with year — tommy123, Jan 10 '19 at 08:05

score 1 · Answer 1 · answered Jan 10 '19 at 08:07

Use the date object, and it's built in functions. Take a vow now to never create an array of month names! setMonth() happily takes values greater than 12, or negative values, so just do what you need...

var myDate = new Date('2019-12-19')
myDate.setMonth( myDate.getMonth()+1 )
var formatted = myDate.toLocaleDateString({},{month:'long',year:'2-digit'})
console.log(formatted)

score 1 · Answer 2 · answered Jan 10 '19 at 08:53

1

I think this one will be enough

monthNames[(new Date().getMonth() % 12)]

answered Jan 10 '19 at 08:53

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How can I show the next month when my present month is Dec of any year ? - JavaScript

2 Answers2