Value for date keeps returning NaN

Question

I want to have a variable having the current date as 'YYYY-MM-DD' format in Javascript. But when i execute my code and check it in the console.log. It simply says NaN

var today = new Date();
var date = today.getFullYear()+'-'+(today.getMonth()+1)+'-'+today.getDate();
console.log("the date format here is ", + date);

The console.log shows the output like "the date format here is NaN"

Can anyone say what have is wrong here?

Answer 1

It is just :

console.log('the date format here is ', date);

There is no need for '+'

If you are thinking of using string concatenation using the plus operator, +, the right syntax would be

console.log('the date format here is ' + date);

However, when it comes to the scenario you are facing, I would personally perfer ES6's template literals.

console.log(`the date format here is ${date}`);

Answer 2

The problem is in passing the parameters to console.log(). You are passing two arguments to function and trying to covert second one which is date to Number using Unary Plus +

console.log("the date format here is ", + date);

Should be

console.log("the date format here is " + date);

You can use an array with contains methods as strings and then call them using map() and then join() them by -

var today = new Date();

 var date = ['getFullYear','getMonth','getDate'].map(x => today[x]()).join('-')
 console.log("the date format here is " + date);