TOPIC OVERVIEW

RTK/Actions

Actions describe what happened and give Redux the information it needs to update your state.

12 QuestionsIntermediateHigh Priority ~8 min read

An action is a description of something that happened in your application. For example, clicking an Add to Cart button might dispatch an action that tells Redux which product should be added. The reducer then uses that action to decide how the state should change.

Redux Toolkit makes actions easier to work with because createSlice automatically generates action creators from your reducers. Instead of manually creating action types and action creator functions, you can simply dispatch the generated action with the data your reducer needs.

What you'll walk away knowing

What an action represents in Redux

How actions are dispatched

How createSlice generates action creators

How payload carries data with an action

1What are actions in Redux Toolkit?ExpertHigh 2How are action creators generated by createSlice()?ExpertHigh 3What does a typical action object look like?ExpertHigh 4How do you dispatch actions from a React component?ExpertHigh 5What is the difference between dispatch(actionCreator(payload)) and dispatch({ type, payload })?ExpertHigh 6How can you handle multiple actions in one reducer?ExpertHigh 7What is the prepare callback in createSlice and how is it used?ExpertHigh 8How do you test actions generated by a slice?ExpertHigh 9How do you create custom actions not tied to a slice?ExpertHigh 10Can you dispatch actions from other actions (chained dispatch)?ExpertHigh 11What happens if you dispatch an undefined or invalid action type?ExpertHigh 12How can you listen to any dispatched action globally?ExpertHigh

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