- Accessing props in
- Creating new objects or functions in the
- Checking for existance of a prop. Should use
- Side effects in
- Inheritance using Mixins.
React Redux and Immutable JS
- Calling toJS inside of state selectors.
- Doing anything in a reducer that doesnt modify the state. Make use of side-effects if you need to fire another action, or do the work in the action itself.