日期值保持返回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

You're using both a comma operator (for argument separation) and a plus operator. Use one:

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

Or the other:

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

Answer 3

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); 

Answer 4

remove the + sign or the, from its wrong

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

Here is the correct one

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