is-callable
Is this JS value callable? Works with Functions and GeneratorFunctions, despite ES6 @@toStringTag.
l7eval5
中文 | [English](./README-en_US.md)
is-function-x
Determine whether a given value is a function object.
eval5
A JavaScript interpreter written in JavaScript
custom-function
Literally the only sane way, if not the fastest one, to extend the Function class without evaluation