Comment by throwitaway1123

This is actually a pretty decent use case for something like this. You could technically convert a user provided filter function to a string to serialize it, then recreate it using the Function() constructor, but that requires adding 'unsafe-eval' to your content security policy [1][2].

[1] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...

[2] https://developer.mozilla.org/en-US/docs/Web/JavaScript/Refe...