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Tuesday, December 20, 2022

[FIXED] What does the plus sign do in '+new Date'

 December 20, 2022     javascript, syntax     No comments   

Issue

I've seen this in a few places

function fn() {
    return +new Date;
}

And I can see that it is returning a timestamp rather than a date object, but I can't find any documentation on what the plus sign is doing.

Can anyone explain?


Solution

That's the + unary operator. It's equivalent to:

function(){ return Number(new Date); }

See http://xkr.us/articles/javascript/unary-add and MDN.



Answered By - kentaromiura
Answer Checked By - Senaida (PHPFixing Volunteer)
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