1<!-- 2Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al. 3 4SPDX-License-Identifier: curl 5--> 6 7# Experimental 8 9Some features and functionality in curl and libcurl are considered 10**EXPERIMENTAL**. 11 12Experimental support in curl means: 13 141. Experimental features are provided to allow users to try them out and 15 provide feedback on functionality and API etc before they ship and get 16 "carved in stone". 172. You must enable the feature when invoking configure as otherwise curl is 18 not built with the feature present. 193. We strongly advise against using this feature in production. 204. **We reserve the right to change behavior** of the feature without sticking 21 to our API/ABI rules as we do for regular features, as long as it is marked 22 experimental. 235. Experimental features are clearly marked so in documentation. Beware. 24 25## Experimental features right now 26 27 - The Hyper HTTP backend 28 - HTTP/3 support (using the quiche or msh3 backends) 29 - The rustls backend 30 - WebSocket 31 - Use of the HTTPS resource record and Encrypted Client Hello (ECH) when using DoH 32
