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React JS Interview Questions

Can you update props in react?

You can’t update props in react js because props are read-only. Moreover, you can not modify props received from parent to child.

React JS Interview Questions

Ho can you re-render a component without using setState() function?

You can use forceUpdate() function for re-rending any component.

React JS Interview Questions

Explain the term reconciliation

When a component’s state or props change then rest will compare the rendered element with previously rendered DOM and will update the actual DOM if it is needed. This process…

React JS Interview Questions

How can you share an element in the parsing?

Using the State, we can share the data.

React JS Interview Questions

When should you use the top-class elements for the function element?

If your element does a stage or lifetime cycle, we should use top-class elements.

React JS Interview Questions

Explain the term synthetic events

It is actually a cross-browser wrapper around the browser’s native event. These events have interface stopPropagation() and preventDefault().

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.

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