>> Does the additional patent grant in the Facebook BSD+Patents license terminate if I sue Facebook for something other than patent infringement?
> No.
>> Does the additional patent grant in the Facebook BSD+Patents license terminate if Facebook sues me for patent infringement first, and then I respond with a patent counterclaim against Facebook?
> No, unless your patent counterclaim is related to Facebook's software licensed under the Facebook BSD+Patents license.
My interpretation of that is if I use React I can't sue Facebook for any patent violations lest they pull their React patent licenses and immediately sue me for infringement.
> If they really want to crush little ol' me, I'm sure their legal team can find something in their existing patent warchest that would apply to React.
Yes, but also to your non-React code, right?
Like...seriously, what patent do you think they might have that somehow only applies to React and not all the other modern frameworks that have been busily copying React?
>> Does the additional patent grant in the Facebook BSD+Patents license terminate if I sue Facebook for something other than patent infringement?
> No.
>> Does the additional patent grant in the Facebook BSD+Patents license terminate if Facebook sues me for patent infringement first, and then I respond with a patent counterclaim against Facebook?
> No, unless your patent counterclaim is related to Facebook's software licensed under the Facebook BSD+Patents license.
My interpretation of that is if I use React I can't sue Facebook for any patent violations lest they pull their React patent licenses and immediately sue me for infringement.