Technical Spike - cookies/localstorage with react/react-router

[astroash]

Cookies will allow us to only display the instruction modal the first time users use the site. Research needed to find out:

• how to set cookies in react/ react-router-dom
• how to interact with cookies in react/ react-router-dom

[maxgerber]

Talk with Elias:

• Q: Is it possible to get cookies to talk to eachother within React?
  A: I would just use localstorage which would be easier?

• Q: Would this be a problem for browsers that don't support it?
  A: As a proof of concept this wouldn't be a problem. It's also quite an old API so is quite widely supported.

• If we were to go to the cookie route, on initial page load, we'd check for existence of the cookie, and serve loading view and a new cookie when it doesn't exist, or serve /home route otherwise. If it doesn't exists, we'd serve back the react app with a cookie. However cookies can't be sent over AJAX, only on pageload, which happens minimally on a React app.

It seems that storing this information in localstorage makes more sense for our use case