Imports and Exports


    We use the keyword import to load values from other JavaScript files via relative path.

    We use export to expose values for importing.

    Named imports and exports

    A single file can have multiple exports, and any subset of these can be imported simultaneously.

    Importing from modules

    There's a shorter syntax for importing 3rd party libraries: we import the name of the module's directory within node_modules (which is the name of the package in the npm package registry).

    Libraries specify a "main" file in their package.json, usually named index.js, which is what actually gets imported. E.g. assuming we had downloaded the moment library into our node_modules, we could import './node_modules/moment/index.js' with just 'moment'.

    Note: importing the path to a directory will generally import the index.js file in that directory. Some developers prefer importing from ./myDirectory rather than ./myDirectory/index.js, but these are equivalent.

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