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https://github.com/preactjs/wmr

👩‍🚀 The tiny all-in-one development tool for modern web apps.
https://github.com/preactjs/wmr

build-tool esmodules preact rollup

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👩‍🚀 The tiny all-in-one development tool for modern web apps.

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# WMR



> [!WARNING]

> WMR is unfortunately no longer maintained. In its place, we'd recommend [Vite](https://vitejs.dev) with [`@preactjs/preset-vite`](https://github.com/preactjs/preset-vite). It offers many of the same features (like the prerendering API) but is much more robust and up to date. Thanks to all contributors and users over the years!



wmr logo



[![npm](https://img.shields.io/npm/v/wmr.svg)](http://npm.im/wmr)

[![install size](https://packagephobia.com/badge?p=wmr)](https://packagephobia.com/result?p=wmr)

[![OpenCollective Backers](https://opencollective.com/preact/backers/badge.svg)](#backers)

[![OpenCollective Sponsors](https://opencollective.com/preact/sponsors/badge.svg)](#sponsors)



**The tiny all-in-one development tool for modern web apps**, in a single 2mb file with no dependencies.



All the features you'd expect and more, from development to production:



🔨   No entry points or pages to configure - just HTML files with ``<br>

🦦 &nbsp; Safely `import "packages"` from npm **_without installation_**<br>

📦 &nbsp; Smart bundling and caching for npm dependencies<br>

↻ &nbsp; Hot reloading for modules, Preact components and CSS<br>

⚡️ &nbsp; Lightning-fast JSX support that you can debug in the browser<br>

💄 &nbsp; Import CSS files and [CSS Modules](https://github.com/css-modules/css-modules) (`*.module.css`)<br>

🔩 &nbsp; Out-of-the-box support for [TypeScript](https://www.typescriptlang.org/)<br>

📂 &nbsp; Static file serving with hot reloading of CSS and images<br>

🗜 &nbsp; Highly optimized Rollup-based production output (`wmr build`)<br>

📑 &nbsp; Crawls and pre-renders your app's pages to static HTML at build time<br>

🏎 &nbsp; Built-in HTTP2 in dev and prod (`wmr serve --http2`)<br>

🔧 &nbsp; Supports [Rollup plugins](packages/wmr/README.md#configuration-and-plugins), even in development where Rollup isn't used



## Quickstart _(recommended)_



Create a new project in seconds using [create-wmr](https://npm.im/create-wmr):



<strong><code>npm init wmr your-project-name</code></strong>



or



<strong><code>yarn create wmr your-project-name</code></strong>



<p>

<img width="400" src="https://user-images.githubusercontent.com/105127/100917537-4661e100-34a5-11eb-89bd-565b7bc31919.gif" alt="illustration of installation to build for wmr">

</p>



> 💁 If you'd like ESLint to be set up for you, add `--eslint` to the command. _Note: this will use 150mb of disk space._



[Check out the docs to learn more](https://wmr.dev/docs)



## Packages



| Package                                              | Description                                              | Version                                                                                                                            |

| ---------------------------------------------------- | :------------------------------------------------------- | :--------------------------------------------------------------------------------------------------------------------------------- |

| [wmr](packages/wmr)                                  | Tiny all-in-one development tool for modern web apps     | [![wmr npm](https://img.shields.io/npm/v/wmr.svg)](https://npm.im/wmr)                                                             |

| [create-wmr](packages/create-wmr)                    | Create a new WMR project in seconds                      | [![create-wmr npm](https://img.shields.io/npm/v/create-wmr.svg)](https://npm.im/create-wmr)                                        |

| [@wmrjs/directory-import](packages/directory-plugin) | Import a directory's files as an Array                   | [![@wmrjs/directory-import npm](https://img.shields.io/npm/v/@wmrjs/directory-import.svg)](https://npm.im/@wmrjs/directory-import) |

| [@wmrjs/nomodule](packages/nomodule-plugin)          | Generate legacy fallback bundles for older browsers      | [![@wmrjs/nomodule npm](https://img.shields.io/npm/v/@wmrjs/nomodule.svg)](https://npm.im/@wmrjs/nomodule)                         |

| [@wmrjs/service-worker](packages/sw-plugin)          | Bundle service workers                                   | [![@wmrjs/service-worker npm](https://img.shields.io/npm/v/@wmrjs/service-worker.svg)](https://npm.im/@wmrjs/service-worker)       |

| [preact-iso](packages/preact-iso)                    | Optimal code-splitting, hydration and routing for Preact | [![preact-iso npm](https://img.shields.io/npm/v/preact-iso.svg)](https://npm.im/preact-iso)                                        |



## Contributing



```sh

git clone [email protected]:preactjs/wmr.git

cd wmr

yarn



# run the demo (no compile)

yarn demo serve



# build and serve the demo for prod

yarn demo build:prod && yarn demo serve:prod



# build the single-file CLI:

yarn workspace wmr build

```



### Adding a changeset



Don't forget to also include a changeset, by running this command at the root of the project:



```sh

yarn changeset

```



This will take you through a process of selecting the changed packages, the version updates and a description of the change. Afterwards, `changesets`, will generate a `.md` file inside a `.changeset` directory. Please commit that file as well.



After all that, you are good to go. :+1: