Why import is not working in react?

Why doesn’t import { React } from ‘react’ work? Because there isn’t an export named React in the react package. There is only a single default export. If you do this, you’ll find that React is undefined .

Can a react component return a string?

React component can return only string, it’s perfectly valid (and works as OP stated) but this use case is not supported. Using components to just return a string is not a good choice. It can be ineffective when you need many translated strings in one component.

Do we need import React from React?

If you use React, import React from ‘react’ is the first thing that you write in your code but if you have created a new react app using creat-react-app recently, you might have noticed that there is no import React statement at the top and your code works just fine.

Should I import React from React?

If you are interested in using React without JSX you can check out the docs. createElement calls, you can see where React is used. If you forget to import React, it will be undefined and the createElement call will fail. So make sure to always import React in your functional components too!

Is react JS server-side?

Think of ReactJS as a server-side templating engine here (like jade, handlebars, etc…). The HTML rendered by the server contains the UI as it should be and you do not wait for any scripts to load. Your page can be indexed by a search engine (if one does not execute any javascript).

What is Babel in React?

Babel is a toolchain that is mainly used to convert ECMAScript 2015+ code into a backwards compatible version of JavaScript in current and older browsers or environments.

What is error boundary in React?

Error boundaries are React components that catch JavaScript errors anywhere in their child component tree, log those errors, and display a fallback UI instead of the component tree that crashed. Error boundaries catch errors during rendering, in lifecycle methods, and in constructors of the whole tree below them.