You probably heard about WebGL context antialias property. The interesting fact is that having true as a value there does not guarantee antialiasing to be actually enabled. It works just as a hint for browser but there are many reasons it might be disabled and you d like to react on this. For example by enabling shader-based FSAA.
With this library you can actually check if AA works for this machine. Once executed it adds window.antialiasingSupported: boolean property which is true if AA is available.
npm install isantialiasingsupported
include into your project and after you may check for
if (window.antialiasingSupported) ...
Library creates tiny detached canvas and draws triangle on it with WebGL.
If triangle have any pixels except white and black then it is antialiased and window.antialiasingSupported is set to true.
Copyright 2018 Denis Radin aka PixelsCommander
Inspired by my work at Evolution Gaming