astro-manifestor is a CLI tool that generates a manifest.json and extracts inline <script> blocks into external files — for example, after building Astro in static mode or using another SSG.

Recursively scans HTML files in dist
Extracts inline scripts into .js files
Generates a manifest.json with per-page dependency mapping

❓ Why you might need this

Astro and similar SSGs produce HTML that includes:

Dynamically hashed assets (JS, CSS, images)
Inline scripts (e.g., for island components)

When integrating such static output into server-side frameworks like Laravel, Bitrix, or Symfony, where HTML is composed via Blade/Twig/PHP, you often need to know exactly which assets each page depends on.

astro-manifestor helps:

Identify which JS/CSS/islands each page uses
Move inline scripts into external .js files (for CSP and caching)
Simplify integrating Astro static output into monolithic apps

🚀 Quick Start

1. Use without installing

npx astro-manifestor \
  --inputDir ./dist \
  --manifestOutFile ./dist/assets/manifest.json \
  --inlineScriptsOutDir ./dist/assets/js \
  --inlineScriptsPublicPath /assets/js \
  --inlineScriptPrefix inline-script- \
  --verbose

Or from a package.json script:

{
  "scripts": {
    "build:manifest": "npx astro-manifestor"
  }
}

2. Install as a dev dependency

npm install --save-dev astro-manifestor

⚙️ CLI Options

Option	Description
`--inputDir`	Directory with HTML files (e.g. `dist/`)
`--manifestOutFile`	Output path for `manifest.json`
`--inlineScriptsOutDir`	Where extracted inline scripts are saved
`--inlineScriptsPublicPath`	Public path used in manifest
`--inlineScriptPrefix`	Prefix for inline script filenames (e.g. `inline-script-`)
`--verbose`	(optional) Print detailed progress info

🔧 Customization

Use astro-manifestor.config.js or .ts in your project root:

export default {
  inputDir: 'dist',
  manifestOutFile: 'dist/assets/manifest.json',
  inlineScriptsOutDir: 'dist/assets/js',
  inlineScriptsPublicPath: '/assets/js',
  inlineScriptPrefix: 'inline-script-',
  verbose: true,
  prettierOptions: {
    tabWidth: 4,
    printWidth: 80,
    htmlWhitespaceSensitivity: 'ignore',
  },
}

Transform the manifest before saving

export default {
  transformManifest: (manifestMap) => {
    for (const key in manifestMap) {
      const entry = manifestMap[key];

      for (const islandName in entry.islands) {
        const island = entry.islands[islandName];

        if (island.componentUrl) {
          island.componentUrl = 'https://example.com' + island.componentUrl;
        }
      }
    }

    return manifestMap;
  },
};

Useful when:

You move or post-process assets after build
Using a CDN or proxy that changes paths
You want to add additional metadata

.ts or .js config files are supported and loaded automatically.

✨ Examples

Example output manifest

{
  "dist/index.html": {
    "js": [
      "/assets/js/inline-script-2mu117.js",
      "/assets/js/ModuleOne.astro_astro_type_script_index_0_lang-CTXcsgZ5.js",
      "/assets/js/Layout.astro_astro_type_script_index_0_lang-DvaTEbLM.js"
    ],
    "css": [
      "/assets/css/index-mR53M-XZ.css",
      "/assets/css/chunk-Bj5H1zmF.css"
    ],
    "islands": {
      "Hello": {
        "uid": "Z2f1Nmm",
        "componentUrl": "https://example.com/assets/js/Hello-CGVomTcg.js",
        "componentExport": "default",
        "rendererUrl": "/assets/js/client-dDWe5wvR.js",
        "client": "only",
        "props": "{}",
        "ssr": ""
      }
    }
  },
  "dist/about/index.html": {
    "js": [],
    "css": [],
    "islands": {}
  }
}

HTML before/after

Before:

<body>
  <script type="module" src="/assets/js/component-A.js"></script>

  <h1>Hello</h1>

  <script>(() => {
    console.log('inline logic');
  })();</script>

  <script type="module" src="/assets/js/component-B.js"></script>
</body>

After:

<body>
  <h1>Hello</h1>

  <script src="/assets/js/inline-script-abc123.js"></script>
  <script type="module" src="/assets/js/component-A.js"></script>
  <script type="module" src="/assets/js/component-B.js"></script>
</body>

✅ What happens:

All <script> tags are moved to the end of <body>
Inline scripts are extracted into external .js files
Execution order is preserved

👀 TODO / Roadmap

Support for inline CSS extraction

Keywords

FAQs

What is astro-manifestor?

Is astro-manifestor popular?

Is astro-manifestor well maintained?

Package last updated on 16 Jul 2025

Did you know?

Socket for GitHub automatically highlights issues in each pull request and monitors the health of all your open source dependencies. Discover the contents of your packages and block harmful activity before you install or update your dependencies.

Install

astro-manifestor