I've been using Uber's graphing libraries, and they're nothing short of stunning.[1] It's easy to get started, and customizing or extending functionality is straightforward, with myriad example to help. And charting is rendering agnostic. SVG? Canvas? You choose. My only gripe is the lack of TypeScript support. I won't touch vanillaJS with a 20 foot pole if I can help, and the the missing type annotations can be painful.

[1] https://deck.gl/ (The navbar dropdown lists all of their libraries for easy exploration.)