grasp/README.md

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Collapse boilerplate in a single commit First prototype Added the README Fixed the hot module replacement Minor adjustments on readme Normalizing the env vars and using it capitalized Added info about the react.js branch Fix babel transpiling Using yarn Removing the babel package, just the babel-core does the job Using just the dependencies key on package.json Since it isn't a lib package doesn't matter the separation between devDependencies and dependencies. Updating the css-loader Updating the fs-extra Moving the utility packages to utils folder Better description Adds the license closes #3 Write the env vars on the bundle file http://dev.topheman.com/make-your-react-production-minified-version-with-webpack/ Fixs the hot reload setup Sringifies the env object to define plugin Uses the webpack html plugin to generate the pages in a less hacky way Uses the write-file-webpack-plugin this plugin allows the webpack write on disk all files, even running with the webserver, which is necessary to the hot reload. this plugin also help us to remove nasty hacks and expose bundles to other extension features. Allows exclude some entry points to be hot reloaded It's useful for content scripts that can't keep the connection with the webpack endpoint. Updates the webpack Updates the README with instructions about the content scripts resolves #4 Updates to Webpack 2 closes #8 Expand the DefinePlugin usage In Webpack 1, the replaced value at compile time by define plugin was placed with parenthesis, like ({"NODE_ENV":"development","PORT":3000}), now, it not works in this way, breaking the app. So, to simplify the things, this commit just passes the NODE_ENV var. Fix README Exclude /node_modules/ from babel and css transpiling #9 Source maps to help debugging closes #10 Removes the forbidden webpack config 'chromeExtensionBoilerplate' before build and webserver's start Although I know that it's not a good practice, right now I don't know a good way to keep the boilerplate configs simple as it is today without this hacky solution, so, until we came with a better solution, we'll remove the key before build and webserver's start. #9 Update README.md Removing babel.js Basically, we don't need transpiling with babel since Webpack 2 take care of ES6 modules transpiling and the ES2015 is supported by Chrome. kudos @gagarine resolve #16 Setup boilerplate to load images and other assets in html and css resolves #18 resolves #23 resolves #14 resolves #12 Added icons and images boilerplate Split dependencies on package.json resolves #15 Webpack config improvements (#26) - Use CopyWebpackPlugin to generate `manifest.json` file - Use CleanWebpackPlugin to clear build folder Minor README adjustments * explicitly the required node version * pointing to yarn install instructions page instead suggest install with npm. the yarn page will be always updated to the best way to install the yarn. closes #28 Adding the contribution guidelines
2016-04-14 06:16:50 -07:00
# Chrome Extension Webpack Boilerplate
A basic foundation boilerplate for rich Chrome Extensions using [Webpack](https://webpack.github.io/) to help you write modular and modern Javascript code, load CSS easily and [automatic reload the browser on code changes](https://webpack.github.io/docs/webpack-dev-server.html#automatic-refresh).
## Developing a new extension
_I'll assume that you already read the [Webpack docs](https://webpack.github.io/docs) and the [Chrome Extension](https://developer.chrome.com/extensions/getstarted) docs._
1. Check if your Node.js version is >= 6.
2. Clone the repository.
3. Install [yarn](https://yarnpkg.com/lang/en/docs/install/).
4. Run `yarn`.
5. Change the package's name and description on `package.json`.
6. Change the name of your extension on `src/manifest.json`.
7. Run `npm run start`
8. Load your extension on Chrome following:
1. Access `chrome://extensions/`
2. Check `Developer mode`
3. Click on `Load unpacked extension`
4. Select the `build` folder.
8. Have fun.
## Structure
All your extension's development code must be placed in `src` folder, including the extension manifest.
The boilerplate is already prepared to have a popup, a options page and a background page. You can easily customize this.
Each page has its own [assets package defined](https://github.com/samuelsimoes/chrome-extension-webpack-boilerplate/blob/master/webpack.config.js#L16-L20). So, to code on popup you must start your code on `src/js/popup.js`, for example.
You must use the [ES6 modules](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/import) to a better code organization. The boilerplate is already prepared to that and [here you have a little example](https://github.com/samuelsimoes/chrome-extension-webpack-boilerplate/blob/master/src/js/popup.js#L2-L4).
## Webpack auto-reload and HRM
To make your workflow much more efficient this boilerplate uses the [webpack server](https://webpack.github.io/docs/webpack-dev-server.html) to development (started with `npm run server`) with auto reload feature that reloads the browser automatically every time that you save some file o your editor.
You can run the dev mode on other port if you want. Just specify the env var `port` like this:
```
$ PORT=6002 npm run start
```
## Content Scripts
Although this boilerplate uses the webpack dev server, it's also prepared to write all your bundles files on the disk at every code change, so you can point, on your extension manifest, to your bundles that you want to use as [content scripts](https://developer.chrome.com/extensions/content_scripts), but you need to exclude these entry points from hot reloading [(why?)](https://github.com/samuelsimoes/chrome-extension-webpack-boilerplate/issues/4#issuecomment-261788690). To do so you need to expose which entry points are content scripts on the `webpack.config.js` using the `chromeExtensionBoilerplate -> notHotReload` config. Look the example below.
Let's say that you want use the `myContentScript` entry point as content script, so on your `webpack.config.js` you will configure the entry point and exclude it from hot reloading, like this:
```js
{
entry: {
myContentScript: "./src/js/myContentScript.js"
},
chromeExtensionBoilerplate: {
notHotReload: ["myContentScript"]
}
}
```
and on your `src/manifest.json`:
```json
{
"content_scripts": [
{
"matches": ["https://www.google.com/*"],
"js": ["myContentScript.bundle.js"]
}
]
}
```
## Packing
After the development of your extension run the command
```
$ NODE_ENV=production npm run build
```
Now, the content of `build` folder will be the extension ready to be submitted to the Chrome Web Store. Just take a look at the [official guide](https://developer.chrome.com/webstore/publish) to more infos about publishing.
## Secrets
If you are developing an extension that talks with some API you probably are using different keys for testing and production. Is a good practice you not commit your secret keys and expose to anyone that have access to the repository.
To this task this boilerplate import the file `./secrets.<THE-NODE_ENV>.js` on your modules through the module named as `secrets`, so you can do things like this:
_./secrets.development.js_
```js
export default { key: "123" };
```
_./src/popup.js_
```js
import secrets from "secrets";
ApiCall({ key: secrets.key });
```
:point_right: The files with name `secrets.*.js` already are ignored on the repository.
## With React.js
:bulb: If you want use [React.js](https://facebook.github.io/react/) with this boilerplate, check the **[react branch](https://github.com/samuelsimoes/chrome-extension-webpack-boilerplate/tree/react)**.
## Contributing
1. **Please!! Do not create a pull request without an issue before discussing the problem.**
2. On your PR make sure that you are following the current codebase style.
3. Your PR must be single purpose. Resolve just one problem on your PR.
4. Make sure to commit in the same style that we are committing until now on the project.
-------------
Samuel Simões ~ [@samuelsimoes](https://twitter.com/samuelsimoes) ~ [Blog](http://blog.samuelsimoes.com/)