Getters for computed store values in Vue - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is a getter in a Vue store?

A getter is a special function in a Vue store that computes and returns derived or computed state based on the store's data. It acts like a computed property for the store.

beginner

How do getters help in managing store state?

Getters let you create reusable computed values from the store's state. This avoids repeating logic and keeps your components simple by accessing processed data directly from the store.

beginner

Show a simple example of a Vue store getter that returns the count doubled.

Example: <br>const store = {<br>  state: { count: 5 },<br>  getters: {<br>    doubleCount(state) {<br>      return state.count * 2;<br>    }<br>  }<br>};<br>Access with store.getters.doubleCount to get 10.

intermediate

Can getters in Vue stores depend on other getters?

Yes, getters can use other getters by accessing them as the second argument in the getter function. This allows building complex computed values from simpler ones.

intermediate

Why should you use getters instead of computing values directly in components?

Using getters centralizes the logic in the store, making it easier to maintain and test. It also ensures all components use the same computed data, avoiding duplication and inconsistencies.

What does a Vue store getter return?

A A component template

B A method to change the store's state

C A direct reference to the state object

D A computed value based on the store's state

Getters return computed values derived from the store's state, not methods or direct state references.

How do you access a getter named 'fullName' in a Vue store?

A store.getters.fullName

B store.state.fullName

C store.fullName()

D store.actions.fullName

Getters are accessed via store.getters followed by the getter name.

Can a getter modify the store's state directly?

A Only if used inside a mutation

B Yes, getters can update state

C No, getters only compute and return values

D Only in development mode

Getters are read-only and should not modify the store's state.

Which of these is a benefit of using getters?

A They centralize computed logic for reuse

B They allow direct DOM manipulation

C They replace actions for async calls

D They store user input

Getters centralize computed logic so multiple components can reuse it.

How can a getter use another getter in Vue?

A By calling it inside the component

B By accessing it as the second argument in the getter function

C By importing it from another file

D By using a mutation

Getters receive state as first and getters as second argument, allowing access to other getters.

Explain what a getter is in a Vue store and why it is useful.

Think about how you get processed data from the store.

Describe how you would create a getter that depends on another getter in Vue.

Remember getters get two arguments: state and getters.