This rabbit hole is a waste of time, as someone who's been down it, you'll find piles of resources claiming CSS and JS flags will give you what you want but it

This rabbit hole is a waste of time, as someone who's been down it, you'll find piles of resources claiming CSS and JS flags will give you what you want but it never really gets there. The only way to actually get true aliased brushes in canvas is implementing a line drawing algorithm manually and drawing down aliased circles like how https://gifpaint.com/ https://gifpaint.com/ & https://jspaint.app/ https://jspaint.app/ do it.