Learning Redux

Implementing a simple session key provider

The persistState store enhancer requires a session key as an argument. You can implement any functionality you want here. For the sake of simplicity, we will define a function to get it from the URL query parameters, like this:

http://localhost:8080/?debug=SESSION_KEY

Let's implement a session key provider that reads from URL query params:

1. We start by defining the function and regex matching for the query parameter:

function getSessionKey () {  const matches = window.location.href.match(/[?&]debug=([^&#]+)\b/)

2. Then, we return the match if we got one, otherwise, we return null:

  return (matches && matches.length > 0)    ? matches[1]    : null}