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React JS Interview Questions

What is the reduction?

The reduction is an application method of handling State.

React JS Interview Questions

What can be done when there is more than one line of expression?

At that time a multi-line JSX expression is the only option left for you.

React JS Interview Questions

What are the major issues of using MVC architecture in React?

Here are the major challenges you will face while handling MVC architecture: DOM handling is quite expensive Most of the time applications were slow and inefficient Because of circular functions,…

React JS Interview Questions

How can a browser read JSX file?

If you want the browser to read JSX, then that JSX file should be replaced using a JSX transformer like Babel and then send back to the browser.

React JS Interview Questions

What is Babel in React js?

Babel, is a JavaScript compiler that converts latest JavaScript like ES6, ES7 into plain old ES5 JavaScript that most browsers understand.

React JS Interview Questions

What is the use of Webpack?

Webpack in basically is a module builder. It is mainly runs during the development process.

React JS Interview Questions

What is Context?

React context helps you to pass data using the tree of react components. It helps you to share data globally between various react components.

React JS Interview Questions

What are reacted portals?

Portal allows you to render children into a DOM node.  CreatePortalmethod is used for it.

React JS Interview Questions

Explain strict mode

Strict Mode allows you to run checks and warnings for react components. It runs only on development build. It helps you to highlight the issues without rendering any visible UI.

React JS Interview Questions

What is the use of empty tags <> ?

Empty tags are used in React for declaring fragments.

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