"async" is not a member of a group specified for any attribute

From: Игорь X <igorsrt@mail.ru>
Date: Sun, 19 Mar 2017 08:59:10 +0300
To: www-validator@w3.org <www-validator@w3.org>
Message-ID: <1489903150.305878033@f304.i.mail.ru>

Hello!

I use an asymchronous Script loading... and see an error in validator:
  Line 12, Column 42 :  "async" is not a member of a group specified for any attribute
    <script type="text/javascript" async src="/js/jquery-1.4.3.min.js"></script> How can I fix it?

Received on Monday, 20 March 2017 09:32:49 UTC