How do you access the imperative API of web components?

  • Use the refs API in React
  • Use the useEffect() hook in React
  • Use the setState() method in React
  • Use the createContext() API in React
In React, you can use the refs API to access the imperative API of web components. By using refs, you can reference a web component and then access its imperative API methods and properties.

What is context?

  • A JavaScript library for data visualization
  • A global object used to store application state
  • A way to pass data down to child components without using props
  • A way to pass data up to parent components without using props
Context is a way to pass data down to child components without using props. It is useful for data that needs to be accessed by many components at different levels of the component hierarchy. Context provides a way to avoid the "prop drilling" problem, where props need to be passed down through many layers of components.

How to do logging in React Native?

  • Use the console.log() function
  • Use the alert() function
  • Use the debugger statement
  • All of the above
To do logging in React Native, you can use the console.log() function, which writes messages to the console in the same way as in a web browser. You can also use other console functions, such as console.warn() and console.error(), to log warning and error messages.

Why React tab is not showing up in DevTools?

  • The React DevTools extension is not installed
  • The React app is not running in development mode
  • There is a conflict with other browser extensions
  • The React app is not using React version 16 or higher
If the React tab is not showing up in DevTools, it may be because the React app is not using React version 16 or higher. The React tab was introduced in version 16, so if you are using an earlier version of React, it will not be available in DevTools. You can check the React version in your app by looking at the package.json file or by running the command 'npm ls react'.

What is Flux?

  • A testing framework for React
  • A database management system
  • A design pattern for managing state in React applications
  • A CSS preprocessor
Flux is a design pattern for managing state in React applications. It was developed by Facebook and is often used in combination with React. Flux emphasizes a unidirectional data flow, in which data flows in a single direction through the application. This helps prevent issues with data inconsistency and makes it easier to manage state in large applications.

What is the recommended way for naming components?

  • Use a long name that includes the component's functionality
  • Use a name that is the same as the component's file name
  • Use a name that is the same as the component's parent folder
  • Use a simple name that describes the component
The recommended way for naming components in React is to use a simple name that describes the component. The name should be a noun or noun phrase that accurately represents the component's purpose. This makes it easier to understand and maintain the code, as well as to reuse the component in other parts of the application.

How do you access props in attribute quotes?

  • {props}
  • {someProp}
  • {this.props.someProp}
  • {this.props}
In React, you can access props in attribute quotes by using the "this.props" syntax and the name of the prop. For example, to access a prop named "someProp", you would use the syntax "{this.props.someProp}" inside the attribute quotes. This allows you to dynamically set attributes based on props, such as setting the value of an input field or the source of an image.

What is the purpose of push and replace methods of history?

  • To add or replace a new route to the history stack
  • To clear the history stack and start a new session
  • To navigate to the previous route in the history stack
  • To update the current route without adding a new entry to the history stack
The push and replace methods of the history object are used to add or replace a new route to the history stack. The push method adds a new entry to the history stack and navigates to the specified route, while the replace method updates the current entry in the history stack without adding a new one. These methods are commonly used for programmatic navigation and managing the browser history in React applications.

Why is DevTools not loading in Chrome for local files?

  • DevTools is not supported for local files
  • The browser security settings prevent DevTools from loading for local files
  • The React app is not running in development mode
  • None of the above
DevTools may not load for local files in Chrome due to the browser's security settings. To fix this issue, you can start Chrome with the --allow-file-access-from-files flag, which disables the security check for local files. Alternatively, you can run the React app on a local web server instead of opening the HTML file directly in the browser.

What is Redux Form?

  • A library for managing forms in Redux applications
  • A middleware for handling asynchronous actions
  • A React component for building UI forms
  • A feature of React for managing application state
Redux Form is a library that provides a simple and efficient way to manage forms in Redux applications. It allows you to easily create and manage form components using a simple declarative syntax. Redux Form provides a range of features, including form validation, field normalization, and asynchronous form submission.