Phoenix LiveView - using JS & Charts component

You can tie into JavaScript with hooks: https://hexdocs.pm/phoenix_live_view/Phoenix.LiveView.html#module-js-interop-and-client-controlled-dom

and if you want JS charts, check out how the Phoenix Dashboard uses uPlot:
https://github.com/phoenixframework/phoenix_live_dashboard/commit/d887c305f887c4d991f2ee40301a628aa41eb8b0

Here's the charting component: -
https://github.com/phoenixframework/phoenix_live_dashboard/blob/master/assets/js/metrics_live/index.js