verdaccio/website/versioned_docs/version-6.x/plugin-theme.md

id	title
plugin-theme	Theme Plugin

What's a theme plugin?

Verdaccio uses by default a custom UI that provides a good set of feature to visualize the packages, but might be case your team needs some custom extra features and here is where a custom theme is an option. The plugin store static assets that will be loaded in the client side when the page is being rendered.

How a theme plugin load phase works?

stateDiagram-v2
    state if_loads <<choice>>
    state if_load_fails <<choice>>


    start : Verdaccio start
    Yes: Loading custom plugin
    No: Custom plugin not found
    Yes_loads: Plugin loads successfully
    No_loads: Plugin fails on load
    load_default: Load default theme (@verdaccio/theme-ui)
    Crash: Verdaccio stops

    [*] --> start
    start --> if_loads
    if_loads --> No: false
    if_loads --> Yes : true
    Yes --> if_load_fails
    No --> load_default

    if_load_fails --> No_loads: false
    if_load_fails --> Yes_loads : true
    No_loads --> Crash

How the assets of the theme loads?

:::caution

By default the application loads on http://localhost:4873, but in cases where a resverse proxy with custom domain are involved the assets are loaded based on the property __VERDACCIO_BASENAME_UI_OPTIONS.base and __VERDACCIO_BASENAME_UI_OPTIONS.basename, thus only one domain configuration can be used.

:::caution

The theme loads only in the client side, the application renders HTML with <script> tags to render the application, the bundler takes care of load any other assets as svg, images or chunks associated with it.

The __VERDACCIO_BASENAME_UI_OPTIONS object

The window.__VERDACCIO_BASENAME_UI_OPTIONS is available in the browser global context, the shape is documented is defined by the here at the TemplateUIOptions types definitions.

// output example
{
    "darkMode": false,
    "basename": "/",
    "base": "https://registry.my.org/",
    "primaryColor": "#4b5e40",
    "version": "5.20.1",
    "pkgManagers": [
        "yarn",
        "pnpm",
        "npm"
    ],
    "login": true,
    "logo": "",
    "title": "Verdaccio Registry",
    "scope": "",
    "language": "es-US"
}

Theme Configuration

By default verdaccio loads the @verdaccio/ui-theme which is bundled in the main package, if you want to load your custom plugin has to be installed where could be found.

$> npm install --global verdaccio-theme-dark

:::caution The plugin name prefix must start with verdaccio-theme-xxx, otherwise the plugin will be ignored. :::caution

You can load only one theme at a time (if more are provided the first one is being selected) and pass through options if you need it.

theme:
  dark:
    option1: foo
    option2: bar

These options will be available

Plugin structure

If you have a custom user interface theme has to follow a specific structure:

{
  "name": "verdaccio-theme-xxxx",
  "version": "1.0.0",
  "description": "my custom user interface",
  "main": "index.js",
}

The main file index.js file should contain the following content.

module.exports = () => {
  return {
    // location of the static files, webpack output
    staticPath: path.join(__dirname, 'static'),
    // webpack manifest json file
    manifest: require('./static/manifest.json'),
    // main manifest files to be loaded
    manifestFiles: {
      js: ['runtime.js', 'vendors.js', 'main.js'],
    },
  };
};

If any of the following properties are not available, the plugin won't load, thus follow this structure.

• staticPath: is the absolute/relative location of the statics files, could be any path either with require.resolve or build your self, what's important is inside of the package or any location that the Express.js middleware is able to find, behind the scenes the res.sendFile is being used.
• manifest: A Webpack manifest object.
• manifestFiles: A object with one property js and the array (order matters) of the manifest id to be loaded in the template dynamically.
• The manifestFiles refers to the main files must be loaded as part of the html scripts in order to load the page, you don't have to include the chunks since are dynamically loaded by the bundler.

Manifest file

Verdaccio requires a manifest object to render the html dynamically, in combination with the manifestFiles the application understand what to render.

Currently only support js but if you also need css, we are open to discuss it and further improvements.

const { WebpackManifestPlugin } = require('webpack-manifest-plugin');

  plugins: [
    ...
    new WebpackManifestPlugin({
      // this is optional depends of your implementation
      removeKeyHash: true,
    }),
    ...
  ],

Manifest with other bundlers

There is no feedback with other bundlers being used with theme plugins, but with esbuild could be possible generate manifests.

Alternatives:

• https://www.npmjs.com/package/esbuild-plugin-manifest

Components UI

:::note

The components UI is an experimental feature can be used since verdccio@5.x, it's open to changes and feedback is welcome.

:::note

Create a new user interface from scratch is big effort, to facilitate the task exist the @verdaccio/ui-components package. The components are based on the React library and Material UI.

The package export parts of the user interface that could be reused:

• React Hooks
• Providers (React Context API)
• Components
• Sections: (Sidebar, Detail, Header, Home Page and Footer)

https://ui-components.verdaccio.org