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How to format JavaScript date into yyyy-mm-dd format?

To format a JavaScript date into “yyyy-mm-dd” format, use the toISOString() method. It converts using ISO standard i.e.

YYYY-MM-DDTHH:mm:ss.sss

Example

You can try to run the following code to format a date.

<html>
   <head>
      <title>JavaScript Dates</title>
   </head>
   <body>
      <script>
         var date, res;
         date = new Date();
         res = date.toISOString();
         document.write(res);
      </script>
   </body>
</html>

Output

2018-12-15T08:13:47.648Z