How to use a custom hook

1. How do custom hooks work?
2. Where do you put a custom hook?
3. How do you make a custom hook?
4. When should you make a custom hook?
5. How do I call a custom hook in useEffect?
6. Is Redux needed with hooks?
7. What does hooking mean?
8. When would you use a useCallback hook?
9. Is react hooks the future?
10. What is a react hook?
11. What is JSX?
12. How do I create a custom react library?

How do custom hooks work?

Custom Hooks are a mechanism to reuse stateful logic (such as setting up a subscription and remembering the current value), but every time you use a custom Hook, all state and effects inside of it are fully isolated. How does a custom Hook get isolated state? Each call to a Hook gets isolated state.

Where do you put a custom hook?

Put Hooks Rules Into Consideration

Only call your Hooks at the top level. Don't call Hooks inside loops, conditions or nested functions. Always call Hooks from React function components or from custom Hooks, don't call Hooks from regular JavaScript functions.

How do you make a custom hook?

A custom hook is a Javascript function that starts with use and that call can other hooks. Remember that components and hooks are functions, so we are really not creating any new concepts here. We are just refactoring our code into another function to make it reusable.

When should you make a custom hook?

Create custom hooks when you notice a common pattern in some of your components that could be extracted and generalized resulting into cleaner and simplified code. Don't create custom hook if its gonna be used by 1 component.

How do I call a custom hook in useEffect?

What you can do is call a hook inside another custom hook. What you need to do is call useGetDocument inside the component and pass the result in the useEffect dependency array.

Is Redux needed with hooks?

When to Use Hooks. You don't always need Redux for every app, or every component. If your app consists of a single view, doesn't save or load state, and has no asynchronous I/O, I can't think of a good reason to add the complexity of Redux.

What does hooking mean?

1a : a curved or bent device for catching, holding, or pulling. b : something intended to attract and ensnare. c : anchor sense 1. 2 : something curved or bent like a hook especially hooks plural : fingers.

When would you use a useCallback hook?

React's useCallback Hook can be used to optimize the rendering behavior of your React function components. We will go through an example component to illustrate the problem first, and then solve it with React's useCallback Hook. Keep in mind that most of the performance optimizations in React are premature.

Is react hooks the future?

React Hooks are a complete and better replacement for Classes. ... Before you say anything, yes, I am aware that React's official documentation states that there are no plans to deprecate class components any time soon, so don't worry, you don't have to go out and re-write your entire code.

What is a react hook?

Hooks are the new feature introduced in the React 16.8 version. It allows you to use state and other React features without writing a class. Hooks are the functions which "hook into" React state and lifecycle features from function components. It does not work inside classes.

What is JSX?

JSX stands for JavaScript XML. JSX allows us to write HTML in React. JSX makes it easier to write and add HTML in React.

How do I create a custom react library?

1. Create a React app. In a directory of your choice, create a simple react app: $ npx create-react-app auth-component-library.
2. Create a HelloWorld Component. Delete the public folder. ...
3. Configure Rollup. js & Babel to Build Our Library. ...
4. Configure package. json. ...
5. Add a Testing Playground to Our Project.