Modern JavaScript from the Beginning - Second Edition - ES Modules

The video tutorial explains how to use ES modules in both Node.js and browser environments. It covers setting up HTML to include JavaScript files as modules, exporting and importing functions and classes, and introduces Webpack for module bundling. The tutorial emphasizes the differences between CommonJS and ES module syntax, demonstrating practical examples of using modules in the front end.

What attribute must be added to a script tag to use ES modules in the browser?

• src

• defer

• type

• async

How do you export a single function as the default in ES modules?

• module.exports = functionName

• export default functionName

• exports.functionName

• export functionName

When importing a default export in ES modules, which syntax is used?

• import { functionName } from 'module'

• import functionName from 'module'

• require('module').functionName

• import * as functionName from 'module'

How can you import multiple named exports from a module in ES modules?

• import { functionName1, functionName2 } from 'module'

• import functionName1, functionName2 from 'module'

• import * as module from 'module'

• require('module').functionName1, functionName2

What is the correct way to export multiple functions in ES modules?

• export default { functionName1, functionName2 }

• module.exports = { functionName1, functionName2 }

• export { functionName1, functionName2 }

• exports.functionName1, functionName2

Which keyword is used to export a class as the default in ES modules?

• export class

• exports

• export default

• module.exports

What is the purpose of using a module bundler like Webpack?

• To minify JavaScript files

• To optimize CSS files

• To bundle multiple modules into a single file

• To convert ES6 code to ES5