How to use font-awesome icons in React?
- Use the Font Awesome component library for React
- Import the Font Awesome CSS file and use the class names
- Use the React Native vector icons library
- There is no way to use Font Awesome icons in React
To use Font Awesome icons in React, you can use the Font Awesome component library for React. This library provides a set of pre-built components for rendering Font Awesome icons, which you can use in your React applications. Alternatively, you can import the Font Awesome CSS file and use the class names directly in your components.
Can you describe the componentDidCatch lifecycle method signature?
- componentDidCatch(error: Error, errorInfo: object)
- componentDidCatch(error: string, errorInfo: object)
- componentDidCatch(error: Error, errorInfo: string)
- componentDidCatch(error: string, errorInfo: string)
The componentDidCatch lifecycle method is called whenever an error is thrown in a component's child tree. The method has a signature of componentDidCatch(error: Error, errorInfo: object). The error parameter is the actual error object that was thrown, while the errorInfo parameter is an object that contains additional information about the error, such as the component stack trace.
How to ensure hooks followed the rules in your project?
- Use a linter plugin such as eslint-plugin-react-hooks
- Use a testing framework to check for rule violations
- Use a code review process to check for rule violations
- All of the above
To ensure that hooks are being used correctly in a project, developers can use a linter plugin such as eslint-plugin-react-hooks to check for rule violations. They can also use a testing framework to check that the application behaves as expected when hooks are used. Finally, a code review process can help catch any rule violations before they are merged into the codebase.
Do you need to have a particular build tool to use Redux?
- Yes, you need to use Webpack to use Redux
- No, you can use any build tool with Redux
No, you do not need to use a particular build tool to use Redux. Redux is a standalone library that can be used with any JavaScript build tool, including Webpack, Rollup, and Browserify. However, some build tools may have specific plugins or configurations that make it easier to work with Redux, so it's worth checking the documentation for your build tool to see if there are any recommended setups.
How you implement Server-Side Rendering or SSR?
- Use a third-party library
- Use the "ReactDOMServer" module
- Use the "ReactServer" package
- Use the "server-render" package
To implement server-side rendering (SSR) in React, you can use the "ReactDOMServer" module. This module provides a method called "renderToString" that allows you to render a component to HTML on the server. You can then send this HTML to the client, where it can be hydrated into a full React application.
How to prevent unnecessary updates using setState?
- Use shouldComponentUpdate lifecycle method
- Use componentDidUpdate lifecycle method
- Use componentWillUnmount lifecycle method
- Use React.PureComponent
The shouldComponentUpdate lifecycle method can be used to prevent unnecessary updates to a component when its props or state have not changed. This method should return a boolean value indicating whether the component should update or not. By default, the method returns true, but it can be overridden to provide custom logic for determining whether an update is necessary.
What is the impact of indexes as keys?
- Can cause issues with component state
- Causes issues with component reusability
- Improves performance
- No impact
Using indexes as keys can cause issues with component state, particularly if the order of the items in the list changes. It can also lead to issues with duplicate keys if items are added or removed from the list. It is generally recommended to use a unique identifier as the key, rather than an index.
What is the popular choice for form handling?
- React Forms
- Redux Form
- Formik
- Unform
Formik is a popular library for handling forms in React. Formik provides a simple and flexible API for managing form state and validation, as well as handling submission and error messages. Formik is widely used in the React community and is considered a best practice for form handling.
How to use FormattedMessage as placeholder using React Intl?
{placeholder}
In React Intl, you can use the component to format text and data with message templates and placeholders. To use a as a placeholder, you can pass an object with the placeholder as a value to the "values" prop of the component. For example: }} />. This will replace the placeholder in the "myMessage" message with the formatted text from the "myPlaceholder" message.
What is MobX?
- A state management library for React
- A testing framework for React
- A build tool for React
- A UI component library for React
MobX is a state management library for React. It allows developers to manage application state in a simple and efficient way, using observables and actions. Observables are objects that can be observed for changes, while actions are functions that modify observables. MobX is often used in combination with React, but it can also be used with other UI libraries.