The type describing your component’s props can be as simple or as complex as you need, though they should be an object type described with either a type or interface. You can learn about how TypeScript describes objects in Object Types but you may also be interested in using Union Types to describe a prop that can be one of a few different types and the Creating Types from Types guide for more advanced use cases.
Example Hooks
The type definitions from @types/react include types for the built-in Hooks, so you can use them in your components without any additional setup. They are built to take into account the code you write in your component, so you will get inferred types a lot of the time and ideally do not need to handle the minutiae of providing the types.
You are viewing: Which Answer Choice Best Describes The Connotation Of Dispatched
Read more : Which Short Term Rental Platform Is Best
However, we can look at a few examples of how to provide types for Hooks.
useState
The useState Hook will re-use the value passed in as the initial state to determine what the type of the value should be. For example:
Will assign the type of boolean to enabled, and setEnabled will be a function accepting either a boolean argument, or a function that returns a boolean. If you want to explicitly provide a type for the state, you can do so by providing a type argument to the useState call:
Read more : How To Check Which Wifi Sonos Is Using
This isn’t very useful in this case, but a common case where you may want to provide a type is when you have a union type. For example, status here can be one of a few different strings:
Or, as recommended in Principles for structuring state, you can group related state as an object and describe the different possibilities via object types:
useReducer
The useReducer Hook is a more complex Hook that takes a reducer function and an initial state. The types for the reducer function are inferred from the initial state. You can optionally provide a type argument to the useReducer call to provide a type for the state, but it is often better to set the type on the initial state instead:
Source: https://t-tees.com
Category: WHICH
