Does this awesome package support headers?

[leopku]

How to add headers for queries or mutations?
It's useful in auth or something else.

[JustinVoitel]

You can set the header when creating your ApolloClient. You just need to concat the link attribute with a provided context function. Here an example:

...
import { ApolloClient } from 'apollo-client'
import { createHttpLink } from 'apollo-link-http'
import { setContext } from 'apollo-link-context'

//like you would normally do

const httpLink = new createHttpLink({
   uri:yourEndpoint
   fetch,
})

//-this function will get called every time
//your client tries to communicate with your graphql endpoint
//-you can also import your svelte stores as shown in this example

const authLink = setContext((_, { headers }) => {
   return {
      headers: {
         ...headers,
         authorization: get(account) ? `Bearer ${get(account).token}` : '',
      },
   }
})

//now use the provided concat method from your context variable

const client = new ApolloClient({
   link: authLink.concat(httpLink)
})