Learning Redux

Applying middleware

Instead of applying middleware by monkeypatching, we can now take a store object, create the enhanced dispatch function by applying the middleware functions, and then return a new store object:

function applyMiddleware (store, middlewares) {  const m = middlewares.slice()  m.reverse() // reverse array, so that the first middleware in the array ends up being applied first  const dispatch = store.dispatch  m.forEach(middleware =>    dispatch = middleware(store)(dispatch)  )  return Object.assign({}, store, { dispatch })}

This is not the official implementation of applyMiddleware() that ships with Redux. However, it is pretty similar, but different in three important aspects. The official implementation has the following features: ...