To import JavaScript modules the require() is used, however it is a part of old CommonJS that was initially devised for Node.js (server-side JavaScript). After ES6 (ECMAScript 2015) got released the import keyword became the new standard.
var name = require('module');
Equivalent in ES6:
import name from 'module';
The advantage of the import statement is that you can import a part of the module. E.g.
import { part } from 'module';
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