1# Experimental
2
3Some features and functionality in curl and libcurl are considered
4**EXPERIMENTAL**.
5
6Experimental support in curl means:
7
81. Experimental features are provided to allow users to try them out and
9   provide feedback on functionality and API etc before they ship and get
10   "carved in stone".
112. You must enable the feature when invoking configure as otherwise curl will
12   not be built with the feature present.
133. We strongly advice against using this feature in production.
144. **We reserve the right to change behavior** of the feature without sticking
15   to our API/ABI rules as we do for regular features, as long as it is marked
16   experimental.
175. Experimental features are clearly marked so in documentation. Beware.
18
19## Experimental features right now
20
21 - HTTP/3 support and options
22 - alt-svc support and options
23