Awesome

React Loadable SSR Add-on

Server Side Render add-on for React Loadable. Load splitted chunks was never that easy.

Description

React Loadable SSR Add-on is a server side render add-on for React Loadable that helps you to load dynamically all files dependencies, e.g. splitted chunks, css, etc.

Oh yeah, and we also provide support for SRI (Subresource Integrity).

Installation

Download our NPM Package

npm install react-loadable-ssr-addon
# or
yarn add react-loadable-ssr-addon

Note: react-loadable-ssr-addon should not be listed in the devDependencies.

How to use

1 - Webpack Plugin

First we need to import the package into our component;

const ReactLoadableSSRAddon = require('react-loadable-ssr-addon');

module.exports = {
  entry: {
    // ...
  },
  output: {
    // ...
  },
  module: {
    // ...
  },
  plugins: [
    new ReactLoadableSSRAddon({
      filename: 'assets-manifest.json',
    }),
  ],
};

2 - On the Server

// import `getBundles` to map required modules and its dependencies
import { getBundles } from 'react-loadable-ssr-addon';
// then import the assets manifest file generated by the Webpack Plugin
import manifest from './your-output-folder/assets-manifest.json';

...

// react-loadable ssr implementation
const modules = new Set();

const html = ReactDOMServer.renderToString(
<Loadable.Capture report={moduleName => modules.add(moduleName)}>
  <App />
</Loadable.Capture>
);

...

// now we concatenate the loaded `modules` from react-loadable `Loadable.Capture` method
// with our application entry point
const modulesToBeLoaded = [...manifest.entrypoints, ...Array.from(modules)];
// also if you find your project still fetching the files after the placement
// maybe a good idea to switch the order from the implementation above to
// const modulesToBeLoaded = [...Array.from(modules), ...manifest.entrypoints];
// see the issue #6 regarding this thread
// https://github.com/themgoncalves/react-loadable-ssr-addon/issues/6

// after that, we pass the required modules to `getBundles` map it.
// `getBundles` will return all the required assets, group by `file type`.
const bundles = getBundles(manifest, modulesToBeLoaded);

// so it's easy to implement it
const styles = bundles.css || [];
const scripts = bundles.js || [];

res.send(`
  <!doctype html>
  <html lang="en">
    <head>...</head>
    ${styles.map(style => {
      return `<link href="/dist/${style.file}" rel="stylesheet" />`;
    }).join('\n')}
    <body>
      <div id="app">${html}</div>
      ${scripts.map(script => {
        return `<script src="/dist/${script.file}"></script>`
      }).join('\n')}
  </html>
`);

See how easy to implement it is?

API Documentation

Webpack Plugin options

`filename`

Type: string Default: react-loadable.json

Assets manifest file name. May contain relative or absolute path.

`integrity`

Type: boolean Default: false

Enable or disable generation of Subresource Integrity (SRI). hash.

`integrityAlgorithms`

Type: array Default: [ 'sha256', 'sha384', 'sha512' ]

Algorithms to generate hash.

`integrityPropertyName`

Type: string Default: integrity

Custom property name to be output in the assets manifest file.

Full configuration example

new ReactLoadableSSRAddon({
  filename: 'assets-manifest.json',
  integrity: false,
  integrityAlgorithms: [ 'sha256', 'sha384', 'sha512' ],
  integrityPropertyName: 'integrity',
})

Server Side

`getBundles`

import { getBundles } from 'react-loadable-ssr-addon';

/**
 * getBundles
 * @param {object} manifest - The assets manifest content generate by ReactLoadableSSRAddon
 * @param {array} chunks - Chunks list to be loaded
 * @returns {array} - Assets list group by file type
 */
const bundles = getBundles(manifest, modules);


const styles = bundles.css || [];
const scripts = bundles.js || [];
const xml = bundles.xml || [];
const json = bundles.json || [];
...

Assets Manifest

`Basic Structure`

{
  "entrypoints": [ ],
  "origins": {
    "app": [ ]
  },
  "assets": {
    "app": {
      "js": [
        {
          "file": "",
          "hash": "",
          "publicPath": "",
          "integrity": ""
        }
      ]
    }
  }
}

`entrypoints`

Type: array

List of all application entry points defined in Webpack entry.

`origins`

Type: array

Origin name requested. List all assets required for the requested origin.

`assets`

Type: array of objects

Lists all application assets generate by Webpack, group by file type, containing an array of objects with the following format:

[file-type]: [
    {
      "file": "",       // assets file
      "hash": "",       // file hash generated by Webpack
      "publicPath": "", // assets file + webpack public path
      "integrity": ""   // integrity base64 hash, if enabled
    }
]

Assets Manifest Example

{
  "entrypoints": [
    "app"
  ],
  "origins": {
    "./home": [
      "home"
    ],
    "./about": [
      "about"
    ],
    "app": [
      "vendors",
      "app"
    ],
     "vendors": [
       "app",
       "vendors"
     ]
  },
  "assets": {
    "home": {
      "js": [
        {
          "file": "home.chunk.js",
          "hash": "fdb00ffa16dfaf9cef0a",
          "publicPath": "/dist/home.chunk.js",
          "integrity": "sha256-Xxf7WVjPbdkJjgiZt7mvZvYv05+uErTC9RC2yCHF1RM= sha384-9OgouqlzN9KrqXVAcBzVMnlYOPxOYv/zLBOCuYtUAMoFxvmfxffbNIgendV4KXSJ sha512-oUxk3Swi0xIqvIxdWzXQIDRYlXo/V/aBqSYc+iWfsLcBftuIx12arohv852DruxKmlqtJhMv7NZp+5daSaIlnw=="
        }
      ]
    },
    "about": {
      "js": [
        {
          "file": "about.chunk.js",
          "hash": "7e88ef606abbb82d7e82",
          "publicPath": "/dist/about.chunk.js",
          "integrity": "sha256-ZPrPWVJRjdS4af9F1FzkqTqqSGo1jYyXNyctwTOLk9o= sha384-J1wiEV8N1foqRF7W9SEvg2s/FhQbhpKFHBTNBJR8g1yEMNRMi38y+8XmjDV/Iu7w sha512-b16+PXStO68CP52R+0ZktccMiaI1v0jOy34l/DqyGN7kEae3DpV3xPNoC8vt1WfE1kCAH7dlnHDdp1XRVhZX+g=="
        }
      ]
    },
    "app": {
      "css": [
        {
          "file": "app.css",
          "hash": "5888714915d8e89a8580",
          "publicPath": "/dist/app.css",
          "integrity": "sha256-3y4DyCC2cLII5sc2kaElHWhBIVMHdan/tA0akReI9qg= sha384-vCMVPKjSrrNpfnhmCD9E8SyHdfPdnM3DO/EkrbNI2vd0m2wH6BnfPja6gt43nDIF"
        }
      ],
      "js": [
        {
          "file": "app.bundle.js",
          "hash": "0cbd05b10204597c781d",
          "publicPath": "/dist/app.bundle.js",
          "integrity": "sha256-sGdw+WVvXK1ZVQnYHI4FpecOcZtWZ99576OHCdrGil8= sha384-DZZzkPtPCTCR5UOWuGCyXQvsjyvZPoreCzqQGyrNV8+HyV9MdoYZawHX7NdGGLyi sha512-y29BlwBuwKB+BeXrrQYEBrK+mfWuOb4ok6F57kGbtrwa/Xq553Zb7lgss8RNvFjBSaMUdvXiJuhmP3HZA0jNeg=="
        }
      ]
    },
    "vendors": {
      "css": [
        {
          "file": "vendors.css",
          "hash": "5a9586c29103a034feb5",
          "publicPath": "/dist/vendors.css"
        }
      ],
      "js": [
        {
          "file": "vendors.chunk.js",
          "hash": "5a9586c29103a034feb5",
          "publicPath": "/dist/vendors.chunk.js"
        }
      ]
    }
  }
}

Release History

1.0.2
- FIX: Fix support for nested output.path
- FIX: Fix support for common js module
1.0.1
- FIX: Webpack v5 deprecation warning
1.0.0
- BREAKING CHANGE: drop support for Webpack v3.
- NEW: add support for Webpack v5

<details> <summary>See older release note</summary> * 0.3.0 * NEW: [`@babel/runtime` become an explicit dependency](https://github.com/themgoncalves/react-loadable-ssr-addon/pull/22) by [@RDIL](https://github.com/RDIL) > Requirement for `yarn v2`. * 0.2.3 * FIX: [Parsing `null` or `undefined` to object on `getBundles()`](https://github.com/themgoncalves/react-loadable-ssr-addon/pull/21) reported by [@slorber](https://github.com/slorber) * 0.2.2 * FIX: As precaution measure, downgrade few dependencies due to node SemVer incompatibility. * 0.2.1 * FIX: [Possible missing chunk](https://github.com/themgoncalves/react-loadable-ssr-addon/pull/20) reported by [@lex111](https://github.com/lex111) * 0.2.0 * Improvement: Reduce memory consumption ([Issue #17](https://github.com/themgoncalves/react-loadable-ssr-addon/issues/17)) reported by [@endiliey](https://github.com/endiliey) * 0.1.9 * FIX: [Missing entry in origins](https://github.com/themgoncalves/react-loadable-ssr-addon/pull/13) reported by [@p-j](https://github.com/p-j); * 0.1.8 * Includes all features from deprecated v0.1.7; * FIX: [Issue #11](https://github.com/themgoncalves/react-loadable-ssr-addon/issues/11) reported by [@endiliey](https://github.com/endiliey) * ~~0.1.7 (_deprecated_)~~ * FIX: [`Cannot read property 'integrity' of undefined`](https://github.com/themgoncalves/react-loadable-ssr-addon/pull/10) reported by [@nguyenngocphuongnb](https://github.com/nguyenngocphuongnb); * Minor improvements. * 0.1.6 * FIX: `getManifestOutputPath` method when requested from `Webpack Dev Middleware`; * 0.1.5 * FIX: [Issue #7](https://github.com/themgoncalves/react-loadable-ssr-addon/issues/7) reported by [@themgoncalves](https://github.com/themgoncalves) and [@tomkelsey](https://github.com/tomkelsey) * 0.1.4 * FIX: [Issue #5](https://github.com/themgoncalves/react-loadable-ssr-addon/issues/5) reported by [@tomkelsey](https://github.com/tomkelsey) * 0.1.3 * FIX: [Issue #4](https://github.com/themgoncalves/react-loadable-ssr-addon/issues/4) reported by [@tomkelsey](https://github.com/tomkelsey) * 0.1.2 * FIX: [Issue #2](https://github.com/themgoncalves/react-loadable-ssr-addon/issues/2) reported by [@tatchi](https://github.com/tatchi) * 0.1.1 * FIX: [Issue #1](https://github.com/themgoncalves/react-loadable-ssr-addon/issues/1) reported by [@tatchi](https://github.com/tatchi) * 0.1.0 * First release * NEW: Created `getBundles()` to retrieve required assets * NEW: Created `ReactLoadableSSRAddon` Plugin for Webpack 3+ * 0.0.1 * Work in progress </details>

Contributing

Fork it (https://github.com/themgoncalves/react-loadable-ssr-addon/fork)
Create your feature branch (git checkout -b feature/fooBar)
Commit your changes (git commit -m ':zap: Add some fooBar')
Push to the branch (git push origin feature/fooBar)
Create a new Pull Request

Emojis for categorizing commits:

⚡️ New feature (:zap:) 🐛 Bug fix (:bug:) 🔥 P0 fix (:fire:) ✅ Tests (:white_check_mark:) 🚀 Performance improvements (:rocket:) 🖍 CSS / Styling (:crayon:) ♿ Accessibility (:wheelchair:) 🌐 Internationalization (:globe_with_meridians:) 📖 Documentation (:book:) 🏗 Infrastructure / Tooling / Builds / CI (:building_construction:) ⏪ Reverting a previous change (:rewind:) ♻️ Refactoring (like moving around code w/o any changes) (:recycle:) 🚮 Deleting code (:put_litter_in_its_place:)