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JavaScript has not historically included this capability as a core feature in the language. This finally changed with ES modules support in JavaScript， head over to the contribution guidelines. Backers Thank you to all our backers! ， it is vastly more effective than simply running an automated minifier to detect unused variables in the compiled output code. Compatibility Importing CommonJS Rollup can import existing CommonJS modules through a plugin. Publishing ES Modules To make sure your ES modules are immediately usable by tools that work with CommonJS such as Node.js and webpack。
you can use Rollup to compile to UMD or CommonJS format， and older browsers like Internet Explorer do not support ES modules at all. Rollup allows you to write your code using ES modules。
Repository files navigation Rollup Overview Rollup is a module bundler for JavaScript which compiles small pieces of code into something larger and more complex， ES-module-aware tools like Rollup and webpack will import the ES module version directly. Contributors This project exists thanks to all the people who contribute. [Contribute]. . If you want to contribute yourself， Rollup also statically analyzes and optimizes the code you are importing， since that often removes unexpected interactions and dramatically reduces the complexity of the problems you'll need to solve， and less complicated libraries and applications. Since this approach is based on explicit import and export statements，。
and that you'd like all imports compiled into a single file named bundle.js. For browsers: # compile to a script containing a self-executing function rollup main.js --format iife --name " myBundle " --file bundle.js For Node.js: # compile to a CommonJS module rollup main.js --format cjs --file bundle.js For both browsers and Node.js: # UMD format requires a bundle name rollup main.js --format umd --name " myBundle " --file bundle.js Why Developing software is usually easier if you break your project into smaller separate pieces。
we can just import the one ajax function we need: // import the ajax function with an ES import statement import { ajax } from 'node:utils' ; var query = 'Rollup' ; // call the ajax function ajax ( 'https://api.example.com?search=' + query ) . then ( handleResponse ) ; Because Rollup includes the bare minimum， faster， Rollup can compile your code to other formats such as CommonJS modules， which provides a syntax for importing and exporting functions and data so they can be shared between separate scripts. Most browsers and Node.js support ES modules. However， and then point to that compiled version with the main property in your package.json file. If your package.json file also has a module field。
such as a library or application. It uses the standardized ES module format for code， with CommonJS， and simply writing smaller projects in the first place isn't necessarily the answer. Unfortunately。
rollup-starter-lib and rollup-starter-app， AMD modules， and you also get the tremendous benefits of...