How to make AJAX request in Redux?
- Use the fetch() method in a component
- Use a middleware such as Redux Thunk or Redux Saga
- Use the getState() method to access the Redux store's state
To make an AJAX request in Redux, you can use a middleware such as Redux Thunk or Redux Saga. These middleware allow you to handle asynchronous actions, such as making an AJAX request, and dispatching actions based on the response.
What are render props?
- A technique for passing functions as props to child components
- A technique for passing state as props to child components
- A technique for rendering components as props to child components
- A technique for rendering state as props to child components
Render props is a technique in React where a component exposes a function prop that returns another component or element. This allows the child component to use the parent's logic or state, and can be used to create reusable, composable components. For example:
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.
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.
How can we find the version of React at runtime in the browser?
- Use the "React.version" property in the console
- Use the "document.head" property in the console
- Use the "npm list react" command in the console
- Use the "window.React.version" property in the console
In React, you can find the version of React at runtime in the browser by using the "React.version" property in the console. This will display the current version of React that is being used on the page.
What are default props?
- Props that are set by the parent component
- Props that are passed to the component through the URL
- Props that are assigned default values
- Props that are passed to the component through a global store
Default props are props that are assigned default values in a React component. These default values are used if the prop is not passed to the component from the parent or if it is passed as undefined. Default props are defined using the defaultProps property on the component class.
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.