I just got in a project on React Native, where I constantly see classes extending both React.Component and Component itself.
Examples:
import {Component} from 'react';
This is called named module import.
The module to import from. This is often a relative or absolute path name to the .js file containing the module, excluding the .js extension. Certain bundlers may permit or require the use of the extension; check your environment. Only single quotes and double quotes Strings are allowed.