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    JavaScript provides multiple ways to import files, primarily using ES6 Modules. This allows you to organize your code into reusable components.

    Example: Importing a Default Export

    // message.js
    const message = () => "Hello, World!";
    export default message;

    // main.js
    import message from './message.js';
    console.log(message()); // Output: Hello, World!
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    Named Exports

    You can export multiple values from a file and import them selectively.

    // person.js
    export const name = "John";
    export const age = 30;

    // main.js
    import { name, age } from './person.js';
    console.log(`${name} is ${age} years old.`); // Output: John is 30 years old
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    Import All as a Namespace

    // math.js
    export const add = (a, b) => a + b;
    export const subtract = (a, b) => a - b;

    // main.js
    import * as math from './math.js';
    console.log(math.add(5, 3)); // Output: 8
    console.log(math.subtract(5, 3)); // Output: 2
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    Dynamic Imports

    For conditional or lazy loading of modules:

    if (someCondition) {
    import('./module.js').then(module => {
    module.someFunction();
    });
    }
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    What is import & export in ES6 (ECMAScript 2015)?
    The import and export syntax available in ES6 (ECMAScript 2015) module is used to include a JavaScript file in another JavaScript file. This approach is the most modern and recommended way to share code between JavaScript files. Use import and export in ES6 modules to include one JS file into another.
    geeksforgeeks.org
    Stack Overflow
    https://stackoverflow.com/questions/950087
    How do I include a JavaScript file in another JavaScript file?
    Feedback
  1. Mozilla Developer
    https://developer.mozilla.org › ... › JavaScript › Reference › Statements › import

    import - JavaScript - MDN

    The static import declaration is used to import read-only live bindings which are exported by another module. The imported bindings are called live bindings because th…
    Named Import

    Given a value named myExport which has been exported from the module my-module either implicitly as export * from "another.js" or explicitly using the export statement, this inserts myExportinto the current scope. You can import multiple names from the sam…

    Default Import

    Default exports need to be imported with the corresponding default import syntax. The simplest version directly imports the default: Since the default export doesn't explicitly specify a name, you can give the identifier any name you like. It is also poss…

    Namespace Import

    The following code inserts myModule into the current scope, containing all the exports from the module located at /modules/my-module.js. Here, myModule represents a namespace object which contains all exports as properties. For example, if the …

    Import A Module For Its Side Effects only

    Import an entire module for side effects only, without importing anything. This runs the module's global code, but doesn't actually import any values. This is often used for polyfills, which mutate the global variables.

  2. Stack Overflow
    https://stackoverflow.com › questions

    How do I include a JavaScript file in another JavaScript …

    Jun 4, 2009 · How do I include a JavaScript file inside another JavaScript file, …

    • Reviews: 3
    • GeeksForGeeks
      https://www.geeksforgeeks.org › javascript › how-to-includ…

      Include a JavaScript File in Another JavaScript File

      Nov 3, 2025 · The import and export syntax available in ES6 (ECMAScript 2015) module is used to include a JavaScript file in another JavaScript file. This …

    • W3School
      https://www.w3schools.com › js › js_modules.asp

      JavaScript Modules - W3Schools

      Modules promote reusability by enabling the export of functions, variables, or objects from one file and their import into other files or projects. This eliminates redundant code and fosters a more efficient …

    • JavaScript Tutorial
      https://www.javascripttutorial.net › javascript-import

      JavaScript Import

      In this tutorial, you will learn how to use the JavaScript import keyword to import variables, functions, and classes from another module.

    • The Modern JavaScript Tutorial
      https://javascript.info › import-export

      Export and Import - The Modern JavaScript Tutorial

      Jan 18, 2023 · Export and import directives have several syntax variants. In the previous article we saw a simple use, now let’s explore more examples. We can …

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    • JavaScriptSource
      https://javascriptsource.com › how-to-import-a-javascript-fi…

      How To Import A JavaScript File In Another JavaScript File

      In this article, we will explain how to include a JavaScript file in another JavaScript file, similar to the way CSS files are imported using the @import rule.

    • Sentry
      https://sentry.io › answers › how-do-i-include-a-javascript-file-in...

      How do I include a JavaScript file in another JavaScript file? - Sentry

      Mar 15, 2024 · All modern browsers support JavaScript modules, making them the easiest way to split JavaScript up between files. Let’s work through a quick example. Consider a file tree like that below:

    • DEV Community
      https://dev.to › askyt

      How to Include a JavaScript File in Another JavaScript File

      Dec 19, 2024 · Here’s a complete guide to help you understand the various ways to include a JavaScript file in another, along with examples. 1. Using ES6 Modules …

    • Medium
      https://medium.com › @python-javascript-php-html-css › h…

      How One JavaScript File Can Be Included in Another

      Sep 24, 2024 · When working on complex web projects, you may find the need to include one JavaScript file inside another. This practice helps in modularizing …

    • Deep dive into JavaScript File Import

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