.htaccess with appropriate CORS header

.htaccess

<IfModule mod_rewrite.c>
  Header add Access-Control-Allow-Origin "*"
  Header add Access-Control-Allow-Methods: "GET,POST,OPTIONS,DELETE,PUT"
  Header add Access-Control-Allow-Headers: "Content-Type"

  RewriteEngine on
  RewriteBase /
</IfModule>

You have a typo: Header add Access-Control-Allow-Origin "*" is missing a colon ':' it should be:

  Header add Access-Control-Allow-Origin: "*"

Shouldn't it be <IfModule mod_headers.c> rather than mod_rewrite.c?

Thanks for sharing a great information with us, it really amazing.

For information purpose for others, You can also have a look at this article which allow CORS header.

Legend, thanks 💯