JSCAD is an open source set of modular, browser and command line tools for creating parametric 2D and 3D designs with JavaScript code. It provides a quick, precise and reproducible method for generating 3D models, and is especially useful for 3D printing applications.
https://github.com/jscad/OpenJSCAD.org/blob/6c7be85d7e208a2b100c3bce10380ada8f9d7e32/packages/modeling/src/primitives/polyhedron.js#L21
It should be "mypoints" instead of "mypoint"