How to pretty print JSON with React?
- Use the JSON.format() method
- Use the JSON.parse() method
- Use the JSON.prettify() method
- Use the JSON.stringify() method
In React, you can pretty print JSON data by using the "JSON.stringify()" method with a "null" value for the "replacer" parameter and a number value for the "space" parameter. This will format the JSON data with indentation and line breaks for readability. For example: JSON.stringify(myData, null, 2).
What are uncontrolled components?
- Components that are managed by React and cannot be updated directly
- Components that are updated using refs
- Components that are updated using the setState() method
- Components that store their own state
Uncontrolled components are components that store their own state and are updated using refs. They are often used for simple form inputs, where managing the state in a parent component would be unnecessary overhead.
Can I import an SVG file as react component?
- Yes, you can import an SVG file as a React component
- No, SVG files cannot be used as React components
Yes, you can import an SVG file as a React component using the '@svgr/webpack' loader or the 'svg-react-loader' package. These tools allow you to import an SVG file as a React component, which you can then use in your React application just like any other component. This can be useful for creating reusable SVG icons or graphics.
Is it possible to use React without rendering HTML?
- No, React is designed for rendering HTML
- Yes, React can be used for building mobile apps with React Native
- Yes, React can be used for non-HTML rendering, such as SVG or canvas
- Yes, React can be used for server-side rendering only
In React, it is possible to use the library for non-HTML rendering, such as SVG or canvas. React provides a flexible programming interface for creating components and managing state, and it can be used to generate any kind of output, not just HTML. React is also used for building mobile apps with React Native, which uses the same programming model as React for building UIs on iOS and Android platforms.
What is windowing technique?
- A technique for manipulating the browser window
- A technique for optimizing performance by rendering only a subset of a large data set
- A technique for managing React state
- A technique for handling asynchronous data fetching
Windowing is a technique used in React to optimize performance when rendering a large data set. Windowing involves rendering only a subset of the data that is currently visible on the screen, and dynamically rendering additional data as the user scrolls or interacts with the UI. This technique can significantly improve the performance of applications that need to render large amounts of data, such as tables, lists, and grids.
How to apply validation on props in React?
- Use the PropTypes library
- Use the React-Validator library
- Use the ValidateJS library
- Use the Validation library
In React, you can apply validation to props using the PropTypes library. PropTypes allow you to define the type and shape of a component's props, which helps catch errors and bugs early in development.
How to add multiple middlewares to Redux?
- Use the applyMiddleware() function with an array of middleware functions
- Add each middleware function to the Redux store one at a time
- Use the combineMiddlewares() function to combine multiple middleware functions
- There is no way to add multiple middlewares to Redux
To add multiple middlewares to Redux, you can use the applyMiddleware() function provided by the Redux library. This function takes an arbitrary number of middleware functions as arguments and returns a single function that can be passed to the createStore() function. The applyMiddleware() function applies the middleware functions to the store in the order they are provided.
Is Hooks cover all use cases for classes?
- Yes, Hooks cover all use cases for classes
- No, there are some use cases where classes may be more appropriate
While Hooks provide an alternative way of managing state and lifecycle methods in functional components, there may be some use cases where classes are more appropriate. For example, classes can be used to implement certain patterns, such as higher-order components (HOCs) and render props, which may not be as straightforward to implement with Hooks.
What is Virtual DOM?
- A representation of the browser's DOM in memory
- A tool for debugging React components
- A type of web server used for server-side rendering
- A virtual machine that runs JavaScript code in the browser
The Virtual DOM is a representation of the browser's DOM in memory. It is used by React to optimize and speed up updates to the actual DOM by minimizing the number of changes that need to be made. When a component's state changes, React updates the Virtual DOM and compares it to the previous version. It then calculates the most efficient way to update the actual DOM based on the differences between the two versions.
How do you render Array, Strings and Numbers in React 16 Version?
- Use createElement method
- Use ReactDOM.render method
- Use JSX syntax
- Use React.createClass method
In React 16 and later versions, Array, Strings, and Numbers can be rendered using JSX syntax. For example, an array can be rendered using the map method, a string can be rendered using curly braces, and a number can be rendered directly.