Case sensitive in the form method?

Question

I always use method="post" (minusculo), but searching tutorials on the internet, most use method="POST" (capital), is there any difference this? can cause problems?

Answer 1

Not.

Attributes are not case-sensitive.

Answer 2

To specification of HTML4 says:

Possible (case-insensitive) values are "get" (the default) and "post"

that is to say does not make it difficult to have large or small letter. Reading the specification of HTML5 It doesn’t mention anything about it, so it stays. In any case, such a clear statement in one of the specifications would be very difficult to change in the future.