JS AdvancedLesson 45Free preview

JS Modules

This lesson is part of JavaScript · All levels

Summary

The modules allow JavaScript code to be broken into several files so that it is more organized and easy to test. Exports are done by export, either named export or default export, and then reused by import in another file. To run it in the browser, the script tag must be given the type='module' attribute that also automatically enables strict mode.

Key points

Export const / export function for named export, export default for main export
Import {name} from './file.js' import named export
Import default module may be given a free name when importing
The module script must be loaded with type='module' and path often requires.

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