Learning Redux

Common mistake 1 - New variables that point to the same objects

When you define a new variable from an object, it does not create a new object--it only creates another reference to the same object.

Consider the following example:

const brokenReducer = (state, action) = {  let posts = state.posts  posts[action.id].text = action.text  return { ...state, posts }}

The preceding highlighted line directly modifies the existing state object. Do not do this.