Update Patent Grant

https://code.facebook.com/posts/1639473982937255/updating-our-open-source-patent-grant/

PATENTS

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Additional Grant of Patent Rights
Additional Grant of Patent Rights Version 2

"Software" means the React software distributed by Facebook, Inc.

Facebook hereby grants you a perpetual, worldwide, royalty-free, non-exclusive,
irrevocable (subject to the termination provision below) license under any
rights in any patent claims owned by Facebook, to make, have made, use, sell,
offer to sell, import, and otherwise transfer the Software. For avoidance of
doubt, no license is granted under Facebook’s rights in any patent claims that
are infringed by (i) modifications to the Software made by you or a third party,
or (ii) the Software in combination with any software or other technology
provided by you or a third party.
Facebook, Inc. ("Facebook") hereby grants to each recipient of the Software
("you") a perpetual, worldwide, royalty-free, non-exclusive, irrevocable
(subject to the termination provision below) license under any Necessary
Claims, to make, have made, use, sell, offer to sell, import, and otherwise
transfer the Software. For avoidance of doubt, no license is granted under
Facebook's rights in any patent claims that are infringed by (i) modifications
to the Software made by you or any third party or (ii) the Software in
combination with any software or other technology.

The license granted hereunder will terminate, automatically and without notice,
for anyone that makes any claim (including by filing any lawsuit, assertion or
other action) alleging (a) direct, indirect, or contributory infringement or
inducement to infringe any patent: (i) by Facebook or any of its subsidiaries or
affiliates, whether or not such claim is related to the Software, (ii) by any
party if such claim arises in whole or in part from any software, product or
service of Facebook or any of its subsidiaries or affiliates, whether or not
such claim is related to the Software, or (iii) by any party relating to the
Software; or (b) that any right in any patent claim of Facebook is invalid or
unenforceable.
if you (or any of your subsidiaries, corporate affiliates or agents) initiate
directly or indirectly, or take a direct financial interest in, any Patent
Assertion: (i) against Facebook or any of its subsidiaries or corporate
affiliates, (ii) against any party if such Patent Assertion arises in whole or
in part from any software, technology, product or service of Facebook or any of
its subsidiaries or corporate affiliates, or (iii) against any party relating
to the Software. Notwithstanding the foregoing, if Facebook or any of its
subsidiaries or corporate affiliates files a lawsuit alleging patent
infringement against you in the first instance, and you respond by filing a
patent infringement counterclaim in that lawsuit against that party that is
unrelated to the Software, the license granted hereunder will not terminate
under section (i) of this paragraph due to such counterclaim.

A "Necessary Claim" is a claim of a patent owned by Facebook that is
necessarily infringed by the Software standing alone.

A "Patent Assertion" is any lawsuit or other action alleging direct, indirect,
or contributory infringement or inducement to infringe any patent, including a
cross-claim or counterclaim.