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+This project was bootstrapped with [Create React App](https://github.com/facebookincubator/create-react-app).
+
+Below you will find some information on how to perform common tasks.`](#changing-the-page-title)
+- [Installing a Dependency](#installing-a-dependency)
+- [Importing a Component](#importing-a-component)
+- [Code Splitting](#code-splitting)
+- [Adding a Stylesheet](#adding-a-stylesheet)
+- [Post-Processing CSS](#post-processing-css)
+- [Adding a CSS Preprocessor (Sass, Less etc.)](#adding-a-css-preprocessor-sass-less-etc)
+- [Adding Images, Fonts, and Files](#adding-images-fonts-and-files)
+- [Using the `public` Folder](#using-the-public-folder)
+ - [Changing the HTML](#changing-the-html)
+ - [Adding Assets Outside of the Module System](#adding-assets-outside-of-the-module-system)
+ - [When to Use the `public` Folder](#when-to-use-the-public-folder)
+- [Using Global Variables](#using-global-variables)
+- [Adding Bootstrap](#adding-bootstrap)
+ - [Using a Custom Theme](#using-a-custom-theme)
+- [Adding Flow](#adding-flow)
+- [Adding Custom Environment Variables](#adding-custom-environment-variables)
+ - [Referencing Environment Variables in the HTML](#referencing-environment-variables-in-the-html)
+ - [Adding Temporary Environment Variables In Your Shell](#adding-temporary-environment-variables-in-your-shell)
+ - [Adding Development Environment Variables In `.env`](#adding-development-environment-variables-in-env)
+- [Can I Use Decorators?](#can-i-use-decorators)
+- [Integrating with an API Backend](#integrating-with-an-api-backend)
+ - [Node](#node)
+ - [Ruby on Rails](#ruby-on-rails)
+- [Proxying API Requests in Development](#proxying-api-requests-in-development)
+ - ["Invalid Host Header" Errors After Configuring Proxy](#invalid-host-header-errors-after-configuring-proxy)
+ - [Configuring the Proxy Manually](#configuring-the-proxy-manually)
+ - [Configuring a WebSocket Proxy](#configuring-a-websocket-proxy)
+- [Using HTTPS in Development](#using-https-in-development)
+- [Generating Dynamic `<meta>` Tags on the Server](#generating-dynamic-meta-tags-on-the-server)
+- [Pre-Rendering into Static HTML Files](#pre-rendering-into-static-html-files)
+- [Injecting Data from the Server into the Page](#injecting-data-from-the-server-into-the-page)
+- [Running Tests](#running-tests)
+ - [Filename Conventions](#filename-conventions)
+ - [Command Line Interface](#command-line-interface)
+ - [Version Control Integration](#version-control-integration)
+ - [Writing Tests](#writing-tests)
+ - [Testing Components](#testing-components)
+ - [Using Third Party Assertion Libraries](#using-third-party-assertion-libraries)
+ - [Initializing Test Environment](#initializing-test-environment)
+ - [Focusing and Excluding Tests](#focusing-and-excluding-tests)
+ - [Coverage Reporting](#coverage-reporting)
+ - [Continuous Integration](#continuous-integration)
+ - [Disabling jsdom](#disabling-jsdom)
+ - [Snapshot Testing](#snapshot-testing)
+ - [Editor Integration](#editor-integration)
+- [Developing Components in Isolation](#developing-components-in-isolation)
+ - [Getting Started with Storybook](#getting-started-with-storybook)
+ - [Getting Started with Styleguidist](#getting-started-with-styleguidist)
+- [Making a Progressive Web App](#making-a-progressive-web-app)
+ - [Opting Out of Caching](#opting-out-of-caching)
+ - [Offline-First Considerations](#offline-first-considerations)
+ - [Progressive Web App Metadata](#progressive-web-app-metadata)
+- [Analyzing the Bundle Size](#analyzing-the-bundle-size)
+- [Deployment](#deployment)
+ - [Static Server](#static-server)
+ - [Other Solutions](#other-solutions)
+ - [Serving Apps with Client-Side Routing](#serving-apps-with-client-side-routing)
+ - [Building for Relative Paths](#building-for-relative-paths)
+ - [Azure](#azure)
+ - [Firebase](#firebase)
+ - [GitHub Pages](#github-pages)
+ - [Heroku](#heroku)
+ - [Netlify](#netlify)
+ - [Now](#now)
+ - [S3 and CloudFront](#s3-and-cloudfront)
+ - [Surge](#surge)
+- [Advanced Configuration](#advanced-configuration)
+- [Troubleshooting](#troubleshooting)
+ - [`npm start` doesn’t detect changes](#npm-start-doesnt-detect-changes)
+ - [`npm test` hangs on macOS Sierra](#npm-test-hangs-on-macos-sierra)
+ - [`npm run build` exits too early](#npm-run-build-exits-too-early)
+ - [`npm run build` fails on Heroku](#npm-run-build-fails-on-heroku)
+ - [`npm run build` fails to minify](#npm-run-build-fails-to-minify)
+ - [Moment.js locales are missing](#momentjs-locales-are-missing)
+- [Something Missing?](#something-missing)
+
+## Updating to New Releases
+
+Create React App is divided into two packages:
+
+* `create-react-app` is a global command-line utility that you use to create new projects.
+* `react-scripts` is a development dependency in the generated projects (including this one).
+
+You almost never need to update `create-react-app` itself: it delegates all the setup to `react-scripts`.
+
+When you run `create-react-app`, it always creates the project with the latest version of `react-scripts` so you’ll get all the new features and improvements in newly created apps automatically.
+
+To update an existing project to a new version of `react-scripts`, [open the changelog](https://github.com/facebookincubator/create-react-app/blob/master/CHANGELOG.md), find the version you’re currently on (check `package.json` in this folder if you’re not sure), and apply the migration instructions for the newer versions.
+
+In most cases bumping the `react-scripts` version in `package.json` and running `npm install` in this folder should be enough, but it’s good to consult the [changelog](https://github.com/facebookincubator/create-react-app/blob/master/CHANGELOG.md) for potential breaking changes.
+
+We commit to keeping the breaking changes minimal so you can upgrade `react-scripts` painlessly.
+
+## Sending Feedback
+
+We are always open to [your feedback](https://github.com/facebookincubator/create-react-app/issues).
+
+## Folder Structure
+
+After creation, your project should look like this:
+
+```
+my-app/
+ README.md
+ node_modules/
+ package.json
+ public/
+ index.html
+ favicon.ico
+ src/
+ App.css
+ App.js
+ App.test.js
+ index.css
+ index.js
+ logo.svg
+```
+
+For the project to build, **these files must exist with exact filenames**:
+
+* `public/index.html` is the page template;
+* `src/index.js` is the JavaScript entry point.
+
+You can delete or rename the other files.
+
+You may create subdirectories inside `src`. For faster rebuilds, only files inside `src` are processed by Webpack.<br>
+You need to **put any JS and CSS files inside `src`**, otherwise Webpack won’t see them.
+
+Only files inside `public` can be used from `public/index.html`.<br>
+Read instructions below for using assets from JavaScript and HTML.
+
+You can, however, create more top-level directories.<br>
+They will not be included in the production build so you can use them for things like documentation.
+
+## Available Scripts
+
+In the project directory, you can run:
+
+### `npm start`
+
+Runs the app in the development mode.<br>
+Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
+
+The page will reload if you make edits.<br>
+You will also see any lint errors in the console.
+
+### `npm test`
+
+Launches the test runner in the interactive watch mode.<br>
+See the section about [running tests](#running-tests) for more information.
+
+### `npm run build`
+
+Builds the app for production to the `build` folder.<br>
+It correctly bundles React in production mode and optimizes the build for the best performance.
+
+The build is minified and the filenames include the hashes.<br>
+Your app is ready to be deployed!
+
+See the section about [deployment](#deployment) for more information.
+
+### `npm run eject`
+
+**Note: this is a one-way operation. Once you `eject`, you can’t go back!**
+
+If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
+
+Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
+
+You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
+
+## Supported Language Features and Polyfills
+
+This project supports a superset of the latest JavaScript standard.<br>
+In addition to [ES6](https://github.com/lukehoban/es6features) syntax features, it also supports:
+
+* [Exponentiation Operator](https://github.com/rwaldron/exponentiation-operator) (ES2016).
+* [Async/await](https://github.com/tc39/ecmascript-asyncawait) (ES2017).
+* [Object Rest/Spread Properties](https://github.com/sebmarkbage/ecmascript-rest-spread) (stage 3 proposal).
+* [Dynamic import()](https://github.com/tc39/proposal-dynamic-import) (stage 3 proposal)
+* [Class Fields and Static Properties](https://github.com/tc39/proposal-class-public-fields) (stage 2 proposal).
+* [JSX](https://facebook.github.io/react/docs/introducing-jsx.html) and [Flow](https://flowtype.org/) syntax.
+
+Learn more about [different proposal stages](https://babeljs.io/docs/plugins/#presets-stage-x-experimental-presets-).
+
+While we recommend to use experimental proposals with some caution, Facebook heavily uses these features in the product code, so we intend to provide [codemods](https://medium.com/@cpojer/effective-javascript-codemods-5a6686bb46fb) if any of these proposals change in the future.
+
+Note that **the project only includes a few ES6 [polyfills](https://en.wikipedia.org/wiki/Polyfill)**:
+
+* [`Object.assign()`](https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Object/assign) via [`object-assign`](https://github.com/sindresorhus/object-assign).
+* [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise) via [`promise`](https://github.com/then/promise).
+* [`fetch()`](https://developer.mozilla.org/en/docs/Web/API/Fetch_API) via [`whatwg-fetch`](https://github.com/github/fetch).
+
+If you use any other ES6+ features that need **runtime support** (such as `Array.from()` or `Symbol`), make sure you are including the appropriate polyfills manually, or that the browsers you are targeting already support them.
+
+## Syntax Highlighting in the Editor
+
+To configure the syntax highlighting in your favorite text editor, head to the [relevant Babel documentation page](https://babeljs.io/docs/editors) and follow the instructions. Some of the most popular editors are covered.
+
+## Displaying Lint Output in the Editor
+
+>Note: this feature is available with `react-scripts@0.2.0` and higher.<br>
+>It also only works with npm 3 or higher.
+
+Some editors, including Sublime Text, Atom, and Visual Studio Code, provide plugins for ESLint.
+
+They are not required for linting. You should see the linter output right in your terminal as well as the browser console. However, if you prefer the lint results to appear right in your editor, there are some extra steps you can do.
+
+You would need to install an ESLint plugin for your editor first. Then, add a file called `.eslintrc` to the project root:
+
+```js
+{
+ "extends": "react-app"
+}
+```
+
+Now your editor should report the linting warnings.
+
+Note that even if you edit your `.eslintrc` file further, these changes will **only affect the editor integration**. They won’t affect the terminal and in-browser lint output. This is because Create React App intentionally provides a minimal set of rules that find common mistakes.
+
+If you want to enforce a coding style for your project, consider using [Prettier](https://github.com/jlongster/prettier) instead of ESLint style rules.
+
+## Debugging in the Editor
+
+**This feature is currently only supported by [Visual Studio Code](https://code.visualstudio.com) and [WebStorm](https://www.jetbrains.com/webstorm/).**
+
+Visual Studio Code and WebStorm support debugging out of the box with Create React App. This enables you as a developer to write and debug your React code without leaving the editor, and most importantly it enables you to have a continuous development workflow, where context switching is minimal, as you don’t have to switch between tools.
+
+### Visual Studio Code
+
+You would need to have the latest version of [VS Code](https://code.visualstudio.com) and VS Code [Chrome Debugger Extension](https://marketplace.visualstudio.com/items?itemName=msjsdiag.debugger-for-chrome) installed.
+
+Then add the block below to your `launch.json` file and put it inside the `.vscode` folder in your app’s root directory.
+
+```json
+{
+ "version": "0.2.0",
+ "configurations": [{
+ "name": "Chrome",
+ "type": "chrome",
+ "request": "launch",
+ "url": "http://localhost:3000",
+ "webRoot": "${workspaceRoot}/src",
+ "userDataDir": "${workspaceRoot}/.vscode/chrome",
+ "sourceMapPathOverrides": {
+ "webpack:///src/*": "${webRoot}/*"
+ }
+ }]
+}
+```
+>Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](#advanced-configuration).
+
+Start your app by running `npm start`, and start debugging in VS Code by pressing `F5` or by clicking the green debug icon. You can now write code, set breakpoints, make changes to the code, and debug your newly modified code—all from your editor.
+
+### WebStorm
+
+You would need to have [WebStorm](https://www.jetbrains.com/webstorm/) and [JetBrains IDE Support](https://chrome.google.com/webstore/detail/jetbrains-ide-support/hmhgeddbohgjknpmjagkdomcpobmllji) Chrome extension installed.
+
+In the WebStorm menu `Run` select `Edit Configurations...`. Then click `+` and select `JavaScript Debug`. Paste `http://localhost:3000` into the URL field and save the configuration.
+
+>Note: the URL may be different if you've made adjustments via the [HOST or PORT environment variables](#advanced-configuration).
+
+Start your app by running `npm start`, then press `^D` on macOS or `F9` on Windows and Linux or click the green debug icon to start debugging in WebStorm.
+
+The same way you can debug your application in IntelliJ IDEA Ultimate, PhpStorm, PyCharm Pro, and RubyMine.
+
+## Formatting Code Automatically
+
+Prettier is an opinionated code formatter with support for JavaScript, CSS and JSON. With Prettier you can format the code you write automatically to ensure a code style within your project. See the [Prettier's GitHub page](https://github.com/prettier/prettier) for more information, and look at this [page to see it in action](https://prettier.github.io/prettier/).
+
+To format our code whenever we make a commit in git, we need to install the following dependencies:
+
+```sh
+npm install --save husky lint-staged prettier
+```
+
+Alternatively you may use `yarn`:
+
+```sh
+yarn add husky lint-staged prettier
+```
+
+* `husky` makes it easy to use githooks as if they are npm scripts.
+* `lint-staged` allows us to run scripts on staged files in git. See this [blog post about lint-staged to learn more about it](https://medium.com/@okonetchnikov/make-linting-great-again-f3890e1ad6b8).
+* `prettier` is the JavaScript formatter we will run before commits.
+
+Now we can make sure every file is formatted correctly by adding a few lines to the `package.json` in the project root.
+
+Add the following line to `scripts` section:
+
+```diff
+ "scripts": {
++ "precommit": "lint-staged",
+ "start": "react-scripts start",
+ "build": "react-scripts build",
+```
+
+Next we add a 'lint-staged' field to the `package.json`, for example:
+
+```diff
+ "dependencies": {
+ // ...
+ },
++ "lint-staged": {
++ "src/**/*.{js,jsx,json,css}": [
++ "prettier --single-quote --write",
++ "git add"
++ ]
++ },
+ "scripts": {
+```
+
+Now, whenever you make a commit, Prettier will format the changed files automatically. You can also run `./node_modules/.bin/prettier --single-quote --write "src/**/*.{js,jsx}"` to format your entire project for the first time.
+
+Next you might want to integrate Prettier in your favorite editor. Read the section on [Editor Integration](https://github.com/prettier/prettier#editor-integration) on the Prettier GitHub page.
+
+## Changing the Page `<title>`
+
+You can find the source HTML file in the `public` folder of the generated project. You may edit the `<title>` tag in it to change the title from “React App” to anything else.
+
+Note that normally you wouldn’t edit files in the `public` folder very often. For example, [adding a stylesheet](#adding-a-stylesheet) is done without touching the HTML.
+
+If you need to dynamically update the page title based on the content, you can use the browser [`document.title`](https://developer.mozilla.org/en-US/docs/Web/API/Document/title) API. For more complex scenarios when you want to change the title from React components, you can use [React Helmet](https://github.com/nfl/react-helmet), a third party library.
+
+If you use a custom server for your app in production and want to modify the title before it gets sent to the browser, you can follow advice in [this section](#generating-dynamic-meta-tags-on-the-server). Alternatively, you can pre-build each page as a static HTML file which then loads the JavaScript bundle, which is covered [here](#pre-rendering-into-static-html-files).
+
+## Installing a Dependency
+
+The generated project includes React and ReactDOM as dependencies. It also includes a set of scripts used by Create React App as a development dependency. You may install other dependencies (for example, React Router) with `npm`:
+
+```sh
+npm install --save react-router
+```
+
+Alternatively you may use `yarn`:
+
+```sh
+yarn add react-router
+```
+
+This works for any library, not just `react-router`.
+
+## Importing a Component
+
+This project setup supports ES6 modules thanks to Babel.<br>
+While you can still use `require()` and `module.exports`, we encourage you to use [`import` and `export`](http://exploringjs.com/es6/ch_modules.html) instead.
+
+For example:
+
+### `Button.js`
+
+```js
+import React, { Component } from 'react';
+
+class Button extends Component {
+ render() {
+ // ...
+ }
+}
+
+export default Button; // Don’t forget to use export default!
+```
+
+### `DangerButton.js`
+
+
+```js
+import React, { Component } from 'react';
+import Button from './Button'; // Import a component from another file
+
+class DangerButton extends Component {
+ render() {
+ return <Button color="red" />;
+ }
+}
+
+export default DangerButton;
+```
+
+Be aware of the [difference between default and named exports](http://stackoverflow.com/questions/36795819/react-native-es-6-when-should-i-use-curly-braces-for-import/36796281#36796281). It is a common source of mistakes.
+
+We suggest that you stick to using default imports and exports when a module only exports a single thing (for example, a component). That’s what you get when you use `export default Button` and `import Button from './Button'`.
+
+Named exports are useful for utility modules that export several functions. A module may have at most one default export and as many named exports as you like.
+
+Learn more about ES6 modules:
+
+* [When to use the curly braces?](http://stackoverflow.com/questions/36795819/react-native-es-6-when-should-i-use-curly-braces-for-import/36796281#36796281)
+* [Exploring ES6: Modules](http://exploringjs.com/es6/ch_modules.html)
+* [Understanding ES6: Modules](https://leanpub.com/understandinges6/read#leanpub-auto-encapsulating-code-with-modules)
+
+## Code Splitting
+
+Instead of downloading the entire app before users can use it, code splitting allows you to split your code into small chunks which you can then load on demand.
+
+This project setup supports code splitting via [dynamic `import()`](http://2ality.com/2017/01/import-operator.html#loading-code-on-demand). Its [proposal](https://github.com/tc39/proposal-dynamic-import) is in stage 3. The `import()` function-like form takes the module name as an argument and returns a [`Promise`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise) which always resolves to the namespace object of the module.
+
+Here is an example:
+
+### `moduleA.js`
+
+```js
+const moduleA = 'Hello';
+
+export { moduleA };
+```
+### `App.js`
+
+```js
+import React, { Component } from 'react';
+
+class App extends Component {
+ handleClick = () => {
+ import('./moduleA')
+ .then(({ moduleA }) => {
+ // Use moduleA
+ })
+ .catch(err => {
+ // Handle failure
+ });
+ };
+
+ render() {
+ return (
+ <div>
+ <button onClick={this.handleClick}>Load</button>
+ </div>
+ );
+ }
+}
+
+export default App;
+```
+
+This will make `moduleA.js` and all its unique dependencies as a separate chunk that only loads after the user clicks the 'Load' button.
+
+You can also use it with `async` / `await` syntax if you prefer it.
+
+### With React Router
+
+If you are using React Router check out [this tutorial](http://serverless-stack.com/chapters/code-splitting-in-create-react-app.html) on how to use code splitting with it. You can find the companion GitHub repository [here](https://github.com/AnomalyInnovations/serverless-stack-demo-client/tree/code-splitting-in-create-react-app).
+
+## Adding a Stylesheet
+
+This project setup uses [Webpack](https://webpack.js.org/) for handling all assets. Webpack offers a custom way of “extending” the concept of `import` beyond JavaScript. To express that a JavaScript file depends on a CSS file, you need to **import the CSS from the JavaScript file**:
+
+### `Button.css`
+
+```css
+.Button {
+ padding: 20px;
+}
+```
+
+### `Button.js`
+
+```js
+import React, { Component } from 'react';
+import './Button.css'; // Tell Webpack that Button.js uses these styles
+
+class Button extends Component {
+ render() {
+ // You can use them as regular CSS styles
+ return <div className="Button" />;
+ }
+}
+```
+
+**This is not required for React** but many people find this feature convenient. You can read about the benefits of this approach [here](https://medium.com/seek-ui-engineering/block-element-modifying-your-javascript-components-d7f99fcab52b). However you should be aware that this makes your code less portable to other build tools and environments than Webpack.
+
+In development, expressing dependencies this way allows your styles to be reloaded on the fly as you edit them. In production, all CSS files will be concatenated into a single minified `.css` file in the build output.
+
+If you are concerned about using Webpack-specific semantics, you can put all your CSS right into `src/index.css`. It would still be imported from `src/index.js`, but you could always remove that import if you later migrate to a different build tool.
+
+## Post-Processing CSS
+
+This project setup minifies your CSS and adds vendor prefixes to it automatically through [Autoprefixer](https://github.com/postcss/autoprefixer) so you don’t need to worry about it.
+
+For example, this:
+
+```css
+.App {
+ display: flex;
+ flex-direction: row;
+ align-items: center;
+}
+```
+
+becomes this:
+
+```css
+.App {
+ display: -webkit-box;
+ display: -ms-flexbox;
+ display: flex;
+ -webkit-box-orient: horizontal;
+ -webkit-box-direction: normal;
+ -ms-flex-direction: row;
+ flex-direction: row;
+ -webkit-box-align: center;
+ -ms-flex-align: center;
+ align-items: center;
+}
+```
+
+If you need to disable autoprefixing for some reason, [follow this section](https://github.com/postcss/autoprefixer#disabling).
+
+## Adding a CSS Preprocessor (Sass, Less etc.)
+
+Generally, we recommend that you don’t reuse the same CSS classes across different components. For example, instead of using a `.Button` CSS class in `<AcceptButton>` and `<RejectButton>` components, we recommend creating a `<Button>` component with its own `.Button` styles, that both `<AcceptButton>` and `<RejectButton>` can render (but [not inherit](https://facebook.github.io/react/docs/composition-vs-inheritance.html)).
+
+Following this rule often makes CSS preprocessors less useful, as features like mixins and nesting are replaced by component composition. You can, however, integrate a CSS preprocessor if you find it valuable. In this walkthrough, we will be using Sass, but you can also use Less, or another alternative.
+
+First, let’s install the command-line interface for Sass:
+
+```sh
+npm install --save node-sass-chokidar
+```
+
+Alternatively you may use `yarn`:
+
+```sh
+yarn add node-sass-chokidar
+```
+
+Then in `package.json`, add the following lines to `scripts`:
+
+```diff
+ "scripts": {
++ "build-css": "node-sass-chokidar src/ -o src/",
++ "watch-css": "npm run build-css && node-sass-chokidar src/ -o src/ --watch --recursive",
+ "start": "react-scripts start",
+ "build": "react-scripts build",
+ "test": "react-scripts test --env=jsdom",
+```
+
+>Note: To use a different preprocessor, replace `build-css` and `watch-css` commands according to your preprocessor’s documentation.
+
+Now you can rename `src/App.css` to `src/App.scss` and run `npm run watch-css`. The watcher will find every Sass file in `src` subdirectories, and create a corresponding CSS file next to it, in our case overwriting `src/App.css`. Since `src/App.js` still imports `src/App.css`, the styles become a part of your application. You can now edit `src/App.scss`, and `src/App.css` will be regenerated.
+
+To share variables between Sass files, you can use Sass imports. For example, `src/App.scss` and other component style files could include `@import "./shared.scss";` with variable definitions.
+
+To enable importing files without using relative paths, you can add the `--include-path` option to the command in `package.json`.
+
+```
+"build-css": "node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/",
+"watch-css": "npm run build-css && node-sass-chokidar --include-path ./src --include-path ./node_modules src/ -o src/ --watch --recursive",
+```
+
+This will allow you to do imports like
+
+```scss
+@import 'styles/_colors.scss'; // assuming a styles directory under src/
+@import 'nprogress/nprogress'; // importing a css file from the nprogress node module
+```
+
+At this point you might want to remove all CSS files from the source control, and add `src/**/*.css` to your `.gitignore` file. It is generally a good practice to keep the build products outside of the source control.
+
+As a final step, you may find it convenient to run `watch-css` automatically with `npm start`, and run `build-css` as a part of `npm run build`. You can use the `&&` operator to execute two scripts sequentially. However, there is no cross-platform way to run two scripts in parallel, so we will install a package for this:
+
+```sh
+npm install --save npm-run-all
+```
+
+Alternatively you may use `yarn`:
+
+```sh
+yarn add npm-run-all
+```
+
+Then we can change `start` and `build` scripts to include the CSS preprocessor commands:
+
+```diff
+ "scripts": {
+ "build-css": "node-sass-chokidar src/ -o src/",
+ "watch-css": "npm run build-css && node-sass-chokidar src/ -o src/ --watch --recursive",
+- "start": "react-scripts start",
+- "build": "react-scripts build",
++ "start-js": "react-scripts start",
++ "start": "npm-run-all -p watch-css start-js",
++ "build": "npm run build-css && react-scripts build",
+ "test": "react-scripts test --env=jsdom",
+ "eject": "react-scripts eject"
+ }
+```
+
+Now running `npm start` and `npm run build` also builds Sass files.
+
+**Why `node-sass-chokidar`?**
+
+`node-sass` has been reported as having the following issues:
+
+- `node-sass --watch` has been reported to have *performance issues* in certain conditions when used in a virtual machine or with docker.
+
+- Infinite styles compiling [#1939](https://github.com/facebookincubator/create-react-app/issues/1939)
+
+- `node-sass` has been reported as having issues with detecting new files in a directory [#1891](https://github.com/sass/node-sass/issues/1891)
+
+ `node-sass-chokidar` is used here as it addresses these issues.
+
+## Adding Images, Fonts, and Files
+
+With Webpack, using static assets like images and fonts works similarly to CSS.
+
+You can **`import` a file right in a JavaScript module**. This tells Webpack to include that file in the bundle. Unlike CSS imports, importing a file gives you a string value. This value is the final path you can reference in your code, e.g. as the `src` attribute of an image or the `href` of a link to a PDF.
+
+To reduce the number of requests to the server, importing images that are less than 10,000 bytes returns a [data URI](https://developer.mozilla.org/en-US/docs/Web/HTTP/Basics_of_HTTP/Data_URIs) instead of a path. This applies to the following file extensions: bmp, gif, jpg, jpeg, and png. SVG files are excluded due to [#1153](https://github.com/facebookincubator/create-react-app/issues/1153).
+
+Here is an example:
+
+```js
+import React from 'react';
+import logo from './logo.png'; // Tell Webpack this JS file uses this image
+
+console.log(logo); // /logo.84287d09.png
+
+function Header() {
+ // Import result is the URL of your image
+ return <img src={logo} alt="Logo" />;
+}
+
+export default Header;
+```
+
+This ensures that when the project is built, Webpack will correctly move the images into the build folder, and provide us with correct paths.
+
+This works in CSS too:
+
+```css
+.Logo {
+ background-image: url(./logo.png);
+}
+```
+
+Webpack finds all relative module references in CSS (they start with `./`) and replaces them with the final paths from the compiled bundle. If you make a typo or accidentally delete an important file, you will see a compilation error, just like when you import a non-existent JavaScript module. The final filenames in the compiled bundle are generated by Webpack from content hashes. If the file content changes in the future, Webpack will give it a different name in production so you don’t need to worry about long-term caching of assets.
+
+Please be advised that this is also a custom feature of Webpack.
+
+**It is not required for React** but many people enjoy it (and React Native uses a similar mechanism for images).<br>
+An alternative way of handling static assets is described in the next section.
+
+## Using the `public` Folder
+
+>Note: this feature is available with `react-scripts@0.5.0` and higher.
+
+### Changing the HTML
+
+The `public` folder contains the HTML file so you can tweak it, for example, to [set the page title](#changing-the-page-title).
+The `<script>` tag with the compiled code will be added to it automatically during the build process.
+
+### Adding Assets Outside of the Module System
+
+You can also add other assets to the `public` folder.
+
+Note that we normally encourage you to `import` assets in JavaScript files instead.
+For example, see the sections on [adding a stylesheet](#adding-a-stylesheet) and [adding images and fonts](#adding-images-fonts-and-files).
+This mechanism provides a number of benefits:
+
+* Scripts and stylesheets get minified and bundled together to avoid extra network requests.
+* Missing files cause compilation errors instead of 404 errors for your users.
+* Result filenames include content hashes so you don’t need to worry about browsers caching their old versions.
+
+However there is an **escape hatch** that you can use to add an asset outside of the module system.
+
+If you put a file into the `public` folder, it will **not** be processed by Webpack. Instead it will be copied into the build folder untouched. To reference assets in the `public` folder, you need to use a special variable called `PUBLIC_URL`.
+
+Inside `index.html`, you can use it like this:
+
+```html
+<link rel="shortcut icon" href="%PUBLIC_URL%/favicon.ico">
+```
+
+Only files inside the `public` folder will be accessible by `%PUBLIC_URL%` prefix. If you need to use a file from `src` or `node_modules`, you’ll have to copy it there to explicitly specify your intention to make this file a part of the build.
+
+When you run `npm run build`, Create React App will substitute `%PUBLIC_URL%` with a correct absolute path so your project works even if you use client-side routing or host it at a non-root URL.
+
+In JavaScript code, you can use `process.env.PUBLIC_URL` for similar purposes:
+
+```js
+render() {
+ // Note: this is an escape hatch and should be used sparingly!
+ // Normally we recommend using `import` for getting asset URLs
+ // as described in “Adding Images and Fonts” above this section.
+ return <img src={process.env.PUBLIC_URL + '/img/logo.png'} />;
+}
+```
+
+Keep in mind the downsides of this approach:
+
+* None of the files in `public` folder get post-processed or minified.
+* Missing files will not be called at compilation time, and will cause 404 errors for your users.
+* Result filenames won’t include content hashes so you’ll need to add query arguments or rename them every time they change.
+
+### When to Use the `public` Folder
+
+Normally we recommend importing [stylesheets](#adding-a-stylesheet), [images, and fonts](#adding-images-fonts-and-files) from JavaScript.
+The `public` folder is useful as a workaround for a number of less common cases:
+
+* You need a file with a specific name in the build output, such as [`manifest.webmanifest`](https://developer.mozilla.org/en-US/docs/Web/Manifest).
+* You have thousands of images and need to dynamically reference their paths.
+* You want to include a small script like [`pace.js`](http://github.hubspot.com/pace/docs/welcome/) outside of the bundled code.
+* Some library may be incompatible with Webpack and you have no other option but to include it as a `<script>` tag.
+
+Note that if you add a `<script>` that declares global variables, you also need to read the next section on using them.
+
+## Using Global Variables
+
+When you include a script in the HTML file that defines global variables and try to use one of these variables in the code, the linter will complain because it cannot see the definition of the variable.
+
+You can avoid this by reading the global variable explicitly from the `window` object, for example:
+
+```js
+const $ = window.$;
+```
+
+This makes it obvious you are using a global variable intentionally rather than because of a typo.
+
+Alternatively, you can force the linter to ignore any line by adding `// eslint-disable-line` after it.
+
+## Adding Bootstrap
+
+You don’t have to use [React Bootstrap](https://react-bootstrap.github.io) together with React but it is a popular library for integrating Bootstrap with React apps. If you need it, you can integrate it with Create React App by following these steps:
+
+Install React Bootstrap and Bootstrap from npm. React Bootstrap does not include Bootstrap CSS so this needs to be installed as well:
+
+```sh
+npm install --save react-bootstrap bootstrap@3
+```
+
+Alternatively you may use `yarn`:
+
+```sh
+yarn add react-bootstrap bootstrap@3
+```
+
+Import Bootstrap CSS and optionally Bootstrap theme CSS in the beginning of your ```src/index.js``` file:
+
+```js
+import 'bootstrap/dist/css/bootstrap.css';
+import 'bootstrap/dist/css/bootstrap-theme.css';
+// Put any other imports below so that CSS from your
+// components takes precedence over default styles.
+```
+
+Import required React Bootstrap components within ```src/App.js``` file or your custom component files:
+
+```js
+import { Navbar, Jumbotron, Button } from 'react-bootstrap';
+```
+
+Now you are ready to use the imported React Bootstrap components within your component hierarchy defined in the render method. Here is an example [`App.js`](https://gist.githubusercontent.com/gaearon/85d8c067f6af1e56277c82d19fd4da7b/raw/6158dd991b67284e9fc8d70b9d973efe87659d72/App.js) redone using React Bootstrap.
+
+### Using a Custom Theme
+
+Sometimes you might need to tweak the visual styles of Bootstrap (or equivalent package).<br>
+We suggest the following approach:
+
+* Create a new package that depends on the package you wish to customize, e.g. Bootstrap.
+* Add the necessary build steps to tweak the theme, and publish your package on npm.
+* Install your own theme npm package as a dependency of your app.
+
+Here is an example of adding a [customized Bootstrap](https://medium.com/@tacomanator/customizing-create-react-app-aa9ffb88165) that follows these steps.
+
+## Adding Flow
+
+Flow is a static type checker that helps you write code with fewer bugs. Check out this [introduction to using static types in JavaScript](https://medium.com/@preethikasireddy/why-use-static-types-in-javascript-part-1-8382da1e0adb) if you are new to this concept.
+
+Recent versions of [Flow](http://flowtype.org/) work with Create React App projects out of the box.
+
+To add Flow to a Create React App project, follow these steps:
+
+1. Run `npm install --save flow-bin` (or `yarn add flow-bin`).
+2. Add `"flow": "flow"` to the `scripts` section of your `package.json`.
+3. Run `npm run flow init` (or `yarn flow init`) to create a [`.flowconfig` file](https://flowtype.org/docs/advanced-configuration.html) in the root directory.
+4. Add `// @flow` to any files you want to type check (for example, to `src/App.js`).
+
+Now you can run `npm run flow` (or `yarn flow`) to check the files for type errors.
+You can optionally use an IDE like [Nuclide](https://nuclide.io/docs/languages/flow/) for a better integrated experience.
+In the future we plan to integrate it into Create React App even more closely.
+
+To learn more about Flow, check out [its documentation](https://flowtype.org/).
+
+## Adding Custom Environment Variables
+
+>Note: this feature is available with `react-scripts@0.2.3` and higher.
+
+Your project can consume variables declared in your environment as if they were declared locally in your JS files. By
+default you will have `NODE_ENV` defined for you, and any other environment variables starting with
+`REACT_APP_`.
+
+**The environment variables are embedded during the build time**. Since Create React App produces a static HTML/CSS/JS bundle, it can’t possibly read them at runtime. To read them at runtime, you would need to load HTML into memory on the server and replace placeholders in runtime, just like [described here](#injecting-data-from-the-server-into-the-page). Alternatively you can rebuild the app on the server anytime you change them.
+
+>Note: You must create custom environment variables beginning with `REACT_APP_`. Any other variables except `NODE_ENV` will be ignored to avoid accidentally [exposing a private key on the machine that could have the same name](https://github.com/facebookincubator/create-react-app/issues/865#issuecomment-252199527). Changing any environment variables will require you to restart the development server if it is running.
+
+These environment variables will be defined for you on `process.env`. For example, having an environment
+variable named `REACT_APP_SECRET_CODE` will be exposed in your JS as `process.env.REACT_APP_SECRET_CODE`.
+
+There is also a special built-in environment variable called `NODE_ENV`. You can read it from `process.env.NODE_ENV`. When you run `npm start`, it is always equal to `'development'`, when you run `npm test` it is always equal to `'test'`, and when you run `npm run build` to make a production bundle, it is always equal to `'production'`. **You cannot override `NODE_ENV` manually.** This prevents developers from accidentally deploying a slow development build to production.
+
+These environment variables can be useful for displaying information conditionally based on where the project is
+deployed or consuming sensitive data that lives outside of version control.
+
+First, you need to have environment variables defined. For example, let’s say you wanted to consume a secret defined
+in the environment inside a `<form>`:
+
+```jsx
+render() {
+ return (
+ <div>
+ <small>You are running this application in <b>{process.env.NODE_ENV}</b> mode.</small>
+ <form>
+ <input type="hidden" defaultValue={process.env.REACT_APP_SECRET_CODE} />
+ </form>
+ </div>
+ );
+}
+```
+
+During the build, `process.env.REACT_APP_SECRET_CODE` will be replaced with the current value of the `REACT_APP_SECRET_CODE` environment variable. Remember that the `NODE_ENV` variable will be set for you automatically.
+
+When you load the app in the browser and inspect the `<input>`, you will see its value set to `abcdef`, and the bold text will show the environment provided when using `npm start`:
+
+```html
+<div>
+ <small>You are running this application in <b>development</b> mode.</small>
+ <form>
+ <input type="hidden" value="abcdef" />
+ </form>
+</div>
+```
+
+The above form is looking for a variable called `REACT_APP_SECRET_CODE` from the environment. In order to consume this
+value, we need to have it defined in the environment. This can be done using two ways: either in your shell or in
+a `.env` file. Both of these ways are described in the next few sections.
+
+Having access to the `NODE_ENV` is also useful for performing actions conditionally:
+
+```js
+if (process.env.NODE_ENV !== 'production') {
+ analytics.disable();
+}
+```
+
+When you compile the app with `npm run build`, the minification step will strip out this condition, and the resulting bundle will be smaller.
+
+### Referencing Environment Variables in the HTML
+
+>Note: this feature is available with `react-scripts@0.9.0` and higher.
+
+You can also access the environment variables starting with `REACT_APP_` in the `public/index.html`. For example:
+
+```html
+<title>%REACT_APP_WEBSITE_NAME%
+```
+
+Note that the caveats from the above section apply:
+
+* Apart from a few built-in variables (`NODE_ENV` and `PUBLIC_URL`), variable names must start with `REACT_APP_` to work.
+* The environment variables are injected at build time. If you need to inject them at runtime, [follow this approach instead](#generating-dynamic-meta-tags-on-the-server).
+
+### Adding Temporary Environment Variables In Your Shell
+
+Defining environment variables can vary between OSes. It’s also important to know that this manner is temporary for the
+life of the shell session.
+
+#### Windows (cmd.exe)
+
+```cmd
+set REACT_APP_SECRET_CODE=abcdef&&npm start
+```
+
+(Note: the lack of whitespace is intentional.)
+
+#### Linux, macOS (Bash)
+
+```bash
+REACT_APP_SECRET_CODE=abcdef npm start
+```
+
+### Adding Development Environment Variables In `.env`
+
+>Note: this feature is available with `react-scripts@0.5.0` and higher.
+
+To define permanent environment variables, create a file called `.env` in the root of your project:
+
+```
+REACT_APP_SECRET_CODE=abcdef
+```
+
+`.env` files **should be** checked into source control (with the exclusion of `.env*.local`).
+
+#### What other `.env` files are can be used?
+
+>Note: this feature is **available with `react-scripts@1.0.0` and higher**.
+
+* `.env`: Default.
+* `.env.local`: Local overrides. **This file is loaded for all environments except test.**
+* `.env.development`, `.env.test`, `.env.production`: Environment-specific settings.
+* `.env.development.local`, `.env.test.local`, `.env.production.local`: Local overrides of environment-specific settings.
+
+Files on the left have more priority than files on the right:
+
+* `npm start`: `.env.development.local`, `.env.development`, `.env.local`, `.env`
+* `npm run build`: `.env.production.local`, `.env.production`, `.env.local`, `.env`
+* `npm test`: `.env.test.local`, `.env.test`, `.env` (note `.env.local` is missing)
+
+These variables will act as the defaults if the machine does not explicitly set them.",
+ "ws": true
+ // ...
+ }
+ }
+ // ...
+}
+```
+
+All requests matching this path will be proxies, no exceptions. This includes requests for `text/html`, which the standard `proxy` option does not proxy.
+
+If you need to specify multiple proxies, you may do so by specifying additional entries.
+You may also narrow down matches using `*` and/or `**`, to match the path exactly or any subpath.
+```js
+{
+ // ...
+ "proxy": {
+ // Matches any request starting with /api
+ "/api": {
+ "target": "",
+ "ws": true
+ // ...
+ },
+ // Matches any request starting with /foo
+ "/foo": {
+ "target": "",
+ "ssl": true,
+ "pathRewrite": {
+ "^/foo": "/foo/beta"
+ }
+ // ...
+ },
+ // Matches /bar/abc.html but not /bar/sub/def.html
+ "/bar/*.html": {
+ "target": "",
+ // ...
+ },
+ // Matches /baz/abc.html and /baz/sub/def.html
+ "/baz/**/*.html": {
+ "target": ""
+ // ...
+ }
+ }
+ // ...
+}
+```
+
+### Configuring a WebSocket Proxy
+
+When setting up a WebSocket proxy, there are a some extra considerations to be aware of.
+
+If you’re using a WebSocket engine like [Socket.io](https://socket.io/), you must have a Socket.io server running that you can use as the proxy target. Socket.io will not work with a standard WebSocket server. Specifically, don't expect Socket.io to work with [the websocket.org echo test](http://websocket.org/echo.html).
+
+There’s some good documentation available for [setting up a Socket.io server](https://socket.io/docs/).
+
+Standard WebSockets **will** work with a standard WebSocket server as well as the websocket.org echo test. You can use libraries like [ws](https://github.com/websockets/ws) for the server, with [native WebSockets in the browser](https://developer.mozilla.org/en-US/docs/Web/API/WebSocket).
+
+Either way, you can proxy WebSocket requests manually in `package.json`:
+
+```js
+{
+ // ...
+ "proxy": {
+ "/socket": {
+ // Your compatible WebSocket server
+ "target": "ws://",
+ // Tell http-proxy-middleware that this is a WebSocket proxy.
+ // Also allows you to proxy WebSocket requests without an additional HTTP request
+ // https://github.com/chimurai/http-proxy-middleware#external-websocket-upgrade
+ "ws": true
+ // ...
+ }
+ }
+ // ...
+}
+```
+
+## Using HTTPS in Development
+
+>Note: this feature is available with `react-scripts@0.4.0` and higher.
+
+You may require the dev server to serve pages over HTTPS. One particular case where this could be useful is when using [the "proxy" feature](#proxying-api-requests-in-development) to proxy requests to an API server when that API server is itself serving HTTPS.
+
+To do this, set the `HTTPS` environment variable to `true`, then start the dev server as usual with `npm start`:
+
+#### Windows (cmd.exe)
+
+```cmd
+set HTTPS=true&&npm start
+```
+
+(Note: the lack of whitespace is intentional.)
+
+#### Linux, macOS (Bash)
+
+```bash
+HTTPS=true npm start
+```
+
+Note that the server will use a self-signed certificate, so your web browser will almost definitely display a warning upon accessing the page.
+
+## Generating Dynamic `` and doesn’t go deeper. For example, even if `` itself renders a `` that throws, this test will pass. Shallow rendering is great for isolated unit tests, but you may still want to create some full rendering tests to ensure the components integrate correctly. Enzyme supports [full rendering with `mount()`](http://airbnb.io/enzyme/docs/api/mount.html), and you can also use it for testing state changes and component lifecycle.
+
+You can read the [Enzyme documentation](http://airbnb.io/enzyme/) for more testing techniques. Enzyme documentation uses Chai and Sinon for assertions but you don’t have to use them because Jest provides built-in `expect()` and `jest.fn()` for spies.
+
+Here is an example from Enzyme documentation that asserts specific output, rewritten to use Jest matchers:
+
+```js
+import React from 'react';
+import { shallow } from 'enzyme';
+import App from './App';
+
+it('renders welcome message', () => {
+ const wrapper = shallow(Welcome to React ;
+ // expect(wrapper.contains(welcome)).to.equal(true);
+ expect(wrapper.contains(welcome)).toEqual(true);
+});
+```
+
+All Jest matchers are [extensively documented here](http://facebook.github.io/jest/docs/expect.html)..js` are served with the contents of the `/static/js/main..js` file.
+
+### Static Server
+
+For environments using [Node](https://nodejs.org/), the easiest way to handle this would be to install [serve](https://github.com/zeit/serve) and let it handle the rest:
+
+```sh
+npm install -g serve
+serve -s build
+```
+
+The last command shown above will serve your static site on the port **5000**. Like many of [serve](https://github.com/zeit/serve)’s internal settings, the port can be adjusted using the `-p` or `--port` flags.
+
+Run this command to get a full list of the options available:
+
+```sh
+serve -h
+```
+
+### Other Solutions
+
+You don’t necessarily need a static server in order to run a Create React App project in production. It works just as fine integrated into an existing dynamic one.
+
+Here’s a programmatic example using [Node](https://nodejs.org/) and [Express](http://expressjs.com/):
+
+```javascript
+const express = require('express');
+const path = require('path');
+const app = express();
+
+app.use(express.static(path.join(__dirname, 'build')));
+
+app.get('/', function (req, res) {
+ res.sendFile(path.join(__dirname, 'build', 'index.html'));
+});
+
+app.listen(9000);
+```
+
+The choice of your server software isn’t important either. Since Create React App is completely platform-agnostic, there’s no need to explicitly use Node.
+
+The `build` folder with static assets is the only output produced by Create React App.
+
+However this is not quite enough if you use client-side routing. Read the next section if you want to support URLs like `/todos/42` in your single-page app.
+
+### Serving Apps with Client-Side Routing
+
+If you use routers that use the HTML5 [`pushState` history API](https://developer.mozilla.org/en-US/docs/Web/API/History_API#Adding_and_modifying_history_entries) under the hood (for example, [React Router](https://github.com/ReactTraining/react-router) with `browserHistory`), many static file servers will fail. For example, if you used React Router with a route for `/todos/42`, the development server will respond to `localhost:3000/todos/42` properly, but an Express serving a production build as above will not.
+
+This is because when there is a fresh page load for a `/todos/42`, the server looks for the file `build/todos/42` and does not find it. The server needs to be configured to respond to a request to `/todos/42` by serving `index.html`. For example, we can amend our Express example above to serve `index.html` for any unknown paths:
+
+```diff
+ app.use(express.static(path.join(__dirname, 'build')));
+
+-app.get('/', function (req, res) {
++app.get('/*', function (req, res) {
+ res.sendFile(path.join(__dirname, 'build', 'index.html'));
+ });
+```
+
+If you’re using [Apache HTTP Server](https://httpd.apache.org/), you need to create a `.htaccess` file in the `public` folder that looks like this:
+
+```
+ Options -MultiViews
+ RewriteEngine On
+ RewriteCond %{REQUEST_FILENAME} !-f
+ RewriteRule ^ index.html [QSA,L]
+```
+
+It will get copied to the `build` folder when you run `npm run build`.
+
+If you’re using [Apache Tomcat](http://tomcat.apache.org/), you need to follow [this Stack Overflow answer](https://stackoverflow.com/a/41249464/4878474).
+
+Now requests to `/todos/42` will be handled correctly both in development and in production.
+
+On a production build, and in a browser that supports [service workers](https://developers.google.com/web/fundamentals/getting-started/primers/service-workers),
+the service worker will automatically handle all navigation requests, like for
+`/todos/42`, by serving the cached copy of your `index.html`. This
+service worker navigation routing can be configured or disabled by
+[`eject`ing](#npm-run-eject) and then modifying the
+[`navigateFallback`](https://github.com/GoogleChrome/sw-precache#navigatefallback-string)
+and [`navigateFallbackWhitelist`](https://github.com/GoogleChrome/sw-precache#navigatefallbackwhitelist-arrayregexp)
+options of the `SWPreachePlugin` [configuration](../config/webpack.config.prod.js).
+
+### Building for Relative Paths
+
+By default, Create React App produces a build assuming your app is hosted at the server root.`.
+```
+
+#### Serving the Same Build from Different Paths
+
+>Note: this feature is available with `react-scripts@0.9.0` and higher.
+
+If you are not using the HTML5 `pushState` history API or not using client-side routing at all, it is unnecessary to specify the URL from which your app will be served. Instead, you can put this in your `package.json`:
+
+```js
+ "homepage": ".",
+```
+
+This will make sure that all the asset paths are relative to `index.html`. You will then be able to move your app from `http://mywebsite.com` to `http://mywebsite.com/relativepath` or even `http://mywebsite.com/relative/path` without having to rebuild it.
+
+### Azure
+
+See [this](https://medium.com/@to_pe/deploying-create-react-app-on-microsoft-azure-c0f6686a4321) blog post on how to deploy your React app to [Microsoft Azure](https://azure.microsoft.com/).
+
+### Firebase
+
+Install the Firebase CLI if you haven’t already by running `npm install -g firebase-tools`. Sign up for a [Firebase account](https://console.firebase.google.com/) and create a new project. Run `firebase login` and login with your previous created Firebase account.
+
+Then run the `firebase init` command from your project’s root. You need to choose the **Hosting: Configure and deploy Firebase Hosting sites** and choose the Firebase project you created in the previous step. You will need to agree with `database.rules.json` being created, choose `build` as the public directory, and also agree to **Configure as a single-page app** by replying with `y`.
+
+```sh
+ === Project Setup
+
+ First, let's associate this project directory with a Firebase project.
+ You can create multiple project aliases by running firebase use --add,
+ but for now we'll just set up a default project.
+
+ ? What Firebase project do you want to associate as default? Example app (example-app-fd690)
+
+ === Database Setup
+
+ Firebase Realtime Database Rules allow you to define how your data should be
+ structured and when your data can be read from and written to.
+
+ ? What file should be used for Database Rules? database.rules.json
+ ✔ Database Rules for example-app-fd690 have been downloaded to database.rules.json.
+ Future modifications to database.rules.json will update Database Rules when you run
+ firebase deploy.
+
+ === Hosting Setup
+
+ Your public directory is the folder (relative to your project directory) that
+ will contain Hosting assets to uploaded with firebase deploy. If you
+ have a build process for your assets, use your build's output directory.
+
+ ? What do you want to use as your public directory? build
+ ? Configure as a single-page app (rewrite all urls to /index.html)? Yes
+ ✔ Wrote build/index.html
+
+ i Writing configuration info to firebase.json...
+ i Writing project information to .firebaserc...
+
+ ✔ Firebase initialization complete!
+```
+
+Now, after you create a production build with `npm run build`, you can deploy it by running `firebase deploy`.
+
+```sh
+ === Deploying to 'example-app-fd690'...
+
+ i deploying database, hosting
+ ✔ database: rules ready to deploy.
+ i hosting: preparing build directory for upload...
+ Uploading: [============================== ] 75%✔ hosting: build folder uploaded successfully
+ ✔ hosting: 8 files uploaded successfully
+ i starting release process (may take several minutes)...
+
+ ✔ Deploy complete!
+
+ Project Console: https://console.firebase.google.com/project/example-app-fd690/overview
+ Hosting URL: https://example-app-fd690.firebaseapp.com
+```
+
+For more information see [Add Firebase to your JavaScript Project](https://firebase.google.com/docs/web/setup).
+
+### GitHub Pages
+
+>Note: this feature is available with `react-scripts@0.2.0` and higher.
+
+#### Step 1: Add `homepage` to `package.json`
+
+**The step below is important!**@djsp/divider-example
+
+
+
+
+ You need to enable JavaScript to run this app.
+
+
+
+
+
diff --git a/examples/checkable-list-example/src/CheckableList.js b/examples/checkable-list-example/src/CheckableList.js
new file mode 100644
index 0000000..8e83c21
--- /dev/null
+++ b/examples/checkable-list-example/src/CheckableList.js
@@ -0,0 +1,139 @@
+// @flow
+
+import React, { Component, Fragment } from 'react'
+import {
+ EditorState,
+ ContentBlock,
+ DefaultDraftBlockRenderMap,
+ RichUtils,
+} from 'draft-js'
+import { withPluginContext } from '@djsp/core'
+import type { PluginProps } from '@djsp/core'
+import {
+ CheckableListItem,
+ CheckableListItemBlock,
+ CHECKABLE_LIST_ITEM,
+ blockRenderMap,
+ CheckableListItemUtils,
+} from 'draft-js-checkable-list-item'
+
+function mergeBlockData(
+ editorState: EditorState,
+ block: ContentBlock,
+ data: { [id: string]: any }
+): EditorState {
+ const content = editorState.getCurrentContent()
+ const updatedBlock = block.mergeIn(['data'], data)
+ const blockKey = block.getKey()
+ const blockMap = content.getBlockMap().merge({ [blockKey]: updatedBlock })
+ return EditorState.push(
+ editorState,
+ content.merge({ blockMap }),
+ 'change-block-data'
+ )
+}
+
+class CheckableList extends Component {
+ _unregister: () => void
+
+ updateEditorState = (newEditorState: EditorState) => {
+ const { setEditorState, editorState } = this.props
+ setEditorState(
+ EditorState.forceSelection(newEditorState, editorState.getSelection())
+ )
+ }
+
+ onClick = event => {
+ event.stopPropagation()
+
+ const { editorState } = this.props
+ const newEditorState = RichUtils.toggleBlockType(
+ editorState,
+ CHECKABLE_LIST_ITEM
+ )
+ this.updateEditorState(newEditorState)
+ }
+
+ toggleChecked = (block: ContentBlock) => {
+ const { editorState } = this.props
+ let newEditorState = mergeBlockData(editorState, block, {
+ checked: !block.getData().get('checked'),
+ })
+ this.updateEditorState(newEditorState)
+ }
+
+ handleTab = (event: SyntheticKeyboardEvent): ?boolean => {
+ // debugger
+ if (this.adjustBlockDepth(event)) {
+ return true
+ }
+ const { editorState, setEditorState } = this.props
+ const newEditorState = RichUtils.onTab(event, editorState, 4)
+ if (newEditorState !== editorState) {
+ setEditorState(newEditorState)
+ }
+ }
+
+ adjustBlockDepth(event: SyntheticKeyboardEvent): boolean {
+ const { editorState, setEditorState } = this.props
+ const newEditorState = CheckableListItemUtils.onTab(event, editorState, 4)
+ if (newEditorState !== editorState) {
+ setEditorState(newEditorState)
+ return true
+ }
+ return false
+ }
+
+ componentDidMount() {
+ const { registerPlugin } = this.props
+
+ this._unregister = registerPlugin({
+ blockRendererFn: (block: ContentBlock): ?CheckableListItemBlock => {
+ if (block.getType() === CHECKABLE_LIST_ITEM) {
+ return {
+ component: CheckableListItem,
+ props: {
+ onChangeChecked: () => this.toggleChecked(block),
+ checked: !!block.getData().get('checked'),
+ },
+ }
+ }
+ },
+ blockRenderMap: DefaultDraftBlockRenderMap.merge(blockRenderMap),
+ blockStyleFn: (block: ContentBlock): ?string => {
+ if (block.getType() === CHECKABLE_LIST_ITEM) {
+ return CHECKABLE_LIST_ITEM
+ }
+ },
+ onTab: this.handleTab,
+ })
+ }
+
+ getStyle = (): object => {
+ const { editorState } = this.props
+ const selection = editorState.getSelection()
+ const currentBlockType = editorState
+ .getCurrentContent()
+ .getBlockForKey(selection.getStartKey())
+ .getType()
+
+ return currentBlockType === CHECKABLE_LIST_ITEM
+ ? {
+ fontWeight: 'BOLD',
+ cursor: 'pointer',
+ }
+ : { cursor: 'pointer' }
+ }
+
+ render() {
+ return (
+
+
+ ✓
+
+
+ )
+ }
+}
+
+export default withPluginContext(CheckableList)
diff --git a/examples/checkable-list-example/src/index.js b/examples/checkable-list-example/src/index.js
new file mode 100644
index 0000000..948abed
--- /dev/null
+++ b/examples/checkable-list-example/src/index.js
@@ -0,0 +1,41 @@
+import React, { Component } from 'react'
+import ReactDOM from 'react-dom'
+
+import { EditorState, convertFromRaw } from 'draft-js'
+import { EditorContainer, Editor } from '@djsp/core'
+import CheckableList from './CheckableList'
+import 'draft-js/dist/Draft.css'
+import 'draft-js-checkable-list-item/lib/CheckableListItem.css'
+import './styles.css'
+
+const rawContent = {
+ blocks: [
+ {
+ text: 'Hey there',
+ },
+ ],
+ entityMap: {},
+}
+
+class App extends Component {
+ state = {
+ editorState: EditorState.createWithContent(convertFromRaw(rawContent)),
+ }
+
+ onChange = editorState => this.setState({ editorState })
+
+ render() {
+ return (
+
+
+
+
+ )
+ }
+}
+
+ReactDOM.render(