Astro-webmanifest NPM

astro-webmanifest

This Astro integration generates a web application manifest, favicon, icons and inserts appropriate html into <head> section for your Astro project during build.

Why astro-webmanifest?

The web app manifest provides information about a Progressive Web App (PWA) in a JSON text file. See Google's advice on web app manifest to learn more. Current standard for the manifest is on W3C. See also on MDN.

This integration provides numerous features beyond manifest configuration to make your life easier, they are:

automatic icon generation - generates multiple icon sizes from a single source;
favicon support;
inserts all required links and meta into <head> section of generated pages;
legacy icon support (iOS);
localization - provides unique manifests for path-based localization.

Each of these features has extensive configuration available so you are always in control.

Installation

The experimental astro add command-line tool automates the installation for you. Run one of the following commands in a new terminal window. (If you aren't sure which package manager you're using, run the first command.) Then, follow the prompts, and type "y" in the terminal (meaning "yes") for each one.

# Using NPM
npx astro add astro-webmanifest

# Using Yarn
yarn astro add astro-webmanifest

# Using PNPM
pnpx astro add astro-webmanifest

Then, restart the dev server by typing CTRL-C and then npm run astro dev in the terminal window that was running Astro.

Because this command is new, it might not properly set things up. If that happens, log an issue on Astro GitHub and try the manual installation steps below.

First, install the astro-webmanifest package using your package manager. If you're using npm or aren't sure, run this in the terminal:

npm install --save-dev astro-webmanifest

Then, apply this integration to your astro.config.* file using the integrations property:

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  // ...
  integrations: [
    webmanifest({
      ...
    }),
  ],
};

Then, restart the dev server.

Usage

The astro-webmanifest integration requires the config object to have at least a name option.

astro.config.mjs

import { defineConfig } from 'astro/config';
import webmanifest from 'astro-webmanifest';

export default defineConfig({
  // ...
  integrations: [
    webmanifest({
      /**
       * required
       **/
      name: 'Your App name',

      /**
       * optional
       **/
      icon: 'src/images/your-icon.svg', // source for favicon & icons

      short_name: 'App',
      description: 'Here is your app description',
      start_url: '/',
      theme_color: '#3367D6',
      background_color: '#3367D6',
      display: 'standalone',
    }),
  ],
});

Next put a source file your-icon.svg for icons generation to the src/images folder. This is optional.

Now, build your site for production via the astro build command. You should find your web manifest, all icons, favicons under dist/ folder!

manifest.webmanifest

{
  "name": "Your App name",
  "icons": [
    {
      "src": "icons/icon-48x48.png",
      "sizes": "48x48",
      "type": "image/png"
    },
    {
      "src": "icons/icon-72x72.png",
      "sizes": "72x72",
      "type": "image/png"
    },
    {
      "src": "icons/icon-96x96.png",
      "sizes": "96x96",
      "type": "image/png"
    },
    {
      "src": "icons/icon-144x144.png",
      "sizes": "144x144",
      "type": "image/png"
    },
    {
      "src": "icons/icon-192x192.png",
      "sizes": "192x192",
      "type": "image/png"
    },
    {
      "src": "icons/icon-256x256.png",
      "sizes": "256x256",
      "type": "image/png"
    },
    {
      "src": "icons/icon-384x384.png",
      "sizes": "384x384",
      "type": "image/png"
    },
    {
      "src": "icons/icon-512x512.png",
      "sizes": "512x512",
      "type": "image/png"
    }
  ],
  "short_name": "App",
  "description": "Here is your app description",
  "start_url": "/",
  "theme_color": "#3367D6",
  "background_color": "#3367D6",
  "display": "standalone"
}

All pages generated at build time will contain the following in the <head> section:

<link rel="icon" href="/favicon-32x32.png" type="image/png" />
<link rel="icon" href="/favicon.svg" type="image/svg+xml" />
<meta name="theme-color" content="#3367D6" />
<link rel="manifest" href="/manifest.webmanifest" crossorigin="anonymous" />

Generations modes

There are 3 usage modes of astro-webmanifest integration: auto, hybrid and manual.

For the most users - you need only the icon option to generate all required icons and favicons.

The integration has default icon preset to generate all icons.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      icon: 'src/images/your-icon.svg',
    }),
  ],
};
...

Additionally to the icon option you need to provide the icons array as a template to generate required icons.

No default icons. Only icons from the array will be created.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      icon: 'src/images/your-icon.svg',
      icons: [
        {
          src: 'icons/icon-96x96.png',
          sizes: '96x96',
          type: 'image/png',
        },
        {
          src: 'icons/icon-256x256.png',
          sizes: '256x256',
          type: 'image/png',
        },
        // add any other icon sizes
      ],
    }),
  ],
};

If you don't provide icon option, you will be fully responsible for manifest configuration.

You should create all icons and favicons manually and put them in a public folder.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      icons: [
        {
          src: 'icons/icon-96x96.png',
          sizes: '96x96',
          type: 'image/png',
        },
        {
          src: 'icons/icon-256x256.png',
          sizes: '256x256',
          type: 'image/png',
        },
        // add any other icons
      ],
    }),
  ],
};

Configuration

To configure this integration, pass an object to the webmanifest() function call in astro.config.mjs.

:bulb: For this integration to work correctly, it is recommended to use the mjs or js configuration file extensions.

astro.config.mjs

...
export default defineConfig({
  integrations: [webmanifest({
    name: ...
  })]
});

The integration option object extends the Webmanifest type and optionally has config and locales properties as an object.

`config` property

Type	Required	Default value
`String`	No	`manifest.webmanifest`

Template name for generated manifest file.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        outfile: 'site.webmanifest',
      },
    }),
  ],
};

See also Localization section.

Type	Required	Default value
`String`	No	4 spaces

Leading characters for each line inserted into <head> to make the output more readable.

This only works when any of the insertFaviconLinks, insertThemeColorMeta, insertManifestLink, insertAppleTouchLinks properties are set to true.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        // Empty string to cut off some bytes from html
        indent: '',
        // ...
      },
    }),
  ],
};

Type	Required	Default value
`String`	No	`\n`

Trailing characters for each line inserted into <head> to make the output more readable.

This only works when any of the insertFaviconLinks, insertThemeColorMeta, insertManifestLink, insertAppleTouchLinks properties are set to true.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        // Empty string to cut off some bytes from html
        eol: '',
        // ...
      },
    }),
  ],
};

Type	Required	Default value
Boolean	No	`true`

Enable or disable a favicon generation.

This only works when the icon property is not empty.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        icon: 'src/images/your-icon.png',
        createFavicon: false, // default - true
        // ...
      },
    }),
  ],
};

Type	Required	Default value
Boolean	No	`true`

Enable or disable the favicon links insertion into <head>.

This only works when the icon property is not empty and createFavicon is true.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        icon: 'src/images/your-icon.png',
        insertFaviconLinks: false, // default - true
        // ...
      },
    }),
  ],
};

:exclamation: The final output reprocessing is used to insert the links into <head> sections. It can impact build times for large sites.

Type	Required	Default value
Boolean	No	`true`

Enable or disable the meta insertion into <head>.

This only works when the theme_color property is not empty.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        theme_color: '0xFFFF',
        insertThemeColorMeta: false, // default - true
        // ...
      },
    }),
  ],
};

:exclamation: The final output reprocessing is used to insert the links into <head> sections. It can impact build times for large sites.

Type	Required	Default value
Boolean	No	`true`

Enable or disable the manifest link insertion into <head>.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        insertManifestLink: false, // default - true
        // ...
      },
    }),
  ],
};

:exclamation: The final output reprocessing is used to insert the links into <head> sections. It can impact build times for large sites.

Type	Required	Default value
CrossOrigin	No	`anonymus`

crossorigin attribute for the manifest link into <head>.

Available values for the CrossOrigin type are anonymous | use-credentials.

More details on MDN.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        crossOrigin: 'use-credentials', // default - anonymus
        // ...
      },
    }),
  ],
};

Type	Required	Default value
Boolean	No	`false`

Enable or disable apple-touch-icon links into <head>.

iOS versions before 11.3 don't have support for web app manifest spec and don't recognize the icons defined in the webmanifest, so the creation of apple-touch-icon links into <head> is needed.

This only works when the icon property is not empty.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        icon: 'src/images/your-icon.png',
        insertAppleTouchLinks: true, // default - false
        // ...
      },
    }),
  ],
};

:exclamation: The final output reprocessing is used to insert the links into <head> sections. It can impact build times for large sites.

Type	Required	Default value
IconPurpose[]	No	`undefined`

Available values for the IconPurpose type are badge | maskable | any |monochrome.

If provided it will be appended to the purpose property of generated icons.

This only works when the icon property is not empty.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',
      config: {
        icon: 'src/images/your-icon.png',
        iconPurpose: ['badge', 'maskable'], 
        // ...
      },
    }),
  ],
};

:exclamation: The final output reprocessing is used to insert the links into <head> sections. It can impact build times for large sites.

`locales` property

Record<string, Webmanifest> - key/object pairs. See usage in Localization section.

Type `Webmanifest`

Name	Type	Required	Description
`icon`	`String`	No	This is a source for automatically generated favicon and icons. It's a part of `Webmanifest` type.Icon format: JPEG, PNG, WebP, TIFF, GIF or SVGIcon size: at least as big as the largest icon being generated (512x512 by default).Icon geometry: preferably square, otherwise the results will be padded with transparent bars to be square.If the `icon` is empty - no automatic icon generation.See more about usage in Generation modes section.
`icons`	`Icon[]`	No	See usage in Generation modes section.
`name`	`String`	Yes	You must provide the name of your app.
`short_name`	`String`	No
`description`	`String`	No
`categories`	`String[]`	No
`lang`	`String`	No
`dir`	`Dir`	No	`auto` \| `ltr` \| `rtl`
`iarc_rating_id`	`String`	No
`id`	`String`	No
`start_url`	`String`	No
`scope`	`String`	No
`theme_color`	`String`	No	Source for `meta` in `<head>`
`background_color`	`String`	No
`display`	`Display`	No	`fullscreen` \| `standalone` \| `minimal-ui` \| `browser`
`display_override`	`Display[]`	No
`orientation`	`Orientation`	No	`any` \| `natural` \| `landscape` \| `landscape-primary` \| `landscape-secondary` \| `portrait` \| `portrait-primary` \| `portrait-secondary`
`protocol_handlers`	`ProtocolHandler[]`	No
`prefer_related_applications`	`Boolean`	No
`related_applications`	`RelatedApplication[]`	No
`screenshots`	`Image[]`	No
`shortcuts`	`Shortcut[]`	No

Type `Icon`

Name	Type	Required	Description
`src`	`String`	Yes	The path to the image file in URL form.
`sizes`	`String`	No	Space-separated image dimensions. Syntax on MDN
`type`	`String`	No	Media type of the image
`purpose`	`String`	No	Space separated list of image purposes (`IconPurpose` type). See on W3C

:bulb: If icon entry sizes property has value any or contains more then one size (96x96 128x128) in that case such entry will be excluded from automatic generation.

For Image, Shortcut, RelatedApplication, ProtocolHandler look on content of index.ts. Also you can find the detailed descriptions on W3C and MDN.

Demo with advanced configuration is in this repo.

Localization

Localization allows you to create a unique manifest, icon set and <head> html for each individual language.

You need to provide locales property as a Record<string, Webmanifest>.

The integration uses the keys of the locales property to make the manifest name unique and to determine the page language by page's path.

The integration expects page paths in the following format: /{locale}{path}, where the locale is a key from the locales property.

Sample configuration below:

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      icon: 'src/images/logomark-light.svg',

      name: 'Webmanifest i18n test',
      short_name: 'Test',
      description: 'This is the application description',
      lang: 'en-US',
      start_url: '/',

      theme_color: '#3367D6',
      background_color: '#3367D6',
      display: 'standalone',

      locales: {
        es: {
          name: 'Prueba Webmanifest i18n',
          short_name: 'Prueba',
          description: 'Esta es la descripción de la aplicación.',
          lang: 'es-ES',
          start_url: '/es',
        },
        fr: {
          name: 'Test i18n du manifeste Web',
          short_name: 'Test',
          description: "Ceci est la description de l'application",
          lang: 'fr-CA',
          start_url: '/fr',
        },
      },
    }),
  ],
};

By this configuration three separate manifests will be generated:

manifest.webmanifest - for default language;
manifest-fr.webmanifest - for fr language;
manifest-es.webmanifest - for es language.

And language specific html will be inserted into <head> section of generated pages.

If you need a separate set of icons for each language, add the icon property.

astro.config.mjs

import webmanifest from 'astro-webmanifest';

export default {
  integrations: [
    webmanifest({
      name: 'Your app name',  
      icon: 'src/images/logo.svg',
      lang: 'en-US',
      // ...
      locales: {
        es: {
          icon: 'src/images/logo-es.svg',
          lang: 'es-ES',
          // ...
        },
        fr: {
          lang: 'fr-CA',
          // ...
        },
      },
    }),
  ],
};

In this configuration, the default en language and fr language will have a common icon set, es will have its own icon set.

:bulb: The favicon will be the same for all languages. The source for generation will be taken from the default language.

You can explore a localization usage in this demo repo.