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@matthesketh/utopia-helmet

v0.7.0

Published

Document head management and favicon generation for UtopiaJS

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Links

Git

Maintainers

mattheskethmatthesketh

Keywords

headmetahelmetfaviconseodocument-headutopiajs

Readme

@matthesketh/utopia-helmet

Document head management and favicon generation for UtopiaJS.

Install

pnpm add @matthesketh/utopia-helmet

Usage

Head management

import { setHead, useHead } from '@matthesketh/utopia-helmet';
import { signal } from '@matthesketh/utopia-core';

// Static — set once
setHead({
  title: 'Home',
  titleTemplate: '%s | My Site',
  htmlLang: 'en',
  themeColor: '#ffffff',
  meta: [
    { name: 'description', content: 'Welcome to my site' },
    { property: 'og:title', content: 'Home' },
  ],
  link: [
    { rel: 'canonical', href: 'https://example.com/' },
  ],
});

// Reactive — updates automatically when signals change
const title = signal('Home');

useHead(() => ({
  title: title(),
  titleTemplate: '%s | My Site',
  meta: [
    { name: 'description', content: `${title()} page` },
  ],
}));

title.set('About'); // head updates automatically

Favicon generation

Generate adaptive SVG favicons with automatic dark mode support:

import { generateFaviconSvg, generateStaticSvg, generateMaskSvg } from '@matthesketh/utopia-helmet';

// Adaptive favicon (dark mode via prefers-color-scheme)
const favicon = generateFaviconSvg('M', {
  fontFamily: "'DM Mono', monospace",
  bg: '#ffffff',
  fg: '#000000',
  darkBg: '#000000',
  darkFg: '#ffffff',
  radius: 12,
});

// Static variant (for Apple touch icon, no media queries)
const touchIcon = generateStaticSvg('M', {
  bg: '#ffffff',
  fg: '#000000',
});

// Mask icon (monochrome, for Safari pinned tabs)
const mask = generateMaskSvg('M');

Web manifest

import { generateManifest } from '@matthesketh/utopia-helmet';

const manifest = generateManifest({
  appName: 'My App',
  shortName: 'App',
  themeColor: '#ffffff',
  backgroundColor: '#ffffff',
  iconPath: '/icons',
});

// Write to public/site.webmanifest
console.log(JSON.stringify(manifest, null, 2));

Favicon link tags

Generate all the <link> tags needed for a complete favicon setup:

import { faviconLinks, setHead } from '@matthesketh/utopia-helmet';

const links = faviconLinks({
  svgPath: '/favicon.svg',
  appleTouchPath: '/apple-touch-icon.png',
  manifestPath: '/site.webmanifest',
  maskPath: '/mask-icon.svg',
  maskColor: '#000000',
  icon32Path: '/favicon-32x32.png',
  icon16Path: '/favicon-16x16.png',
});

setHead({ link: links });

API

Head management

| Export | Description | | --- | --- | | setTitle(title, template?) | Set document title, optionally with a %s template | | setMeta(descriptor) | Set or update a single <meta> tag | | setLink(descriptor) | Set or update a single <link> tag | | setHtmlLang(lang) | Set the lang attribute on <html> | | setHtmlDir(dir) | Set the dir attribute on <html> | | setHead(config) | Apply a full head configuration (clears previous managed elements) | | useHead(configFn) | Reactive head — re-applies when signals in configFn change | | resetHead() | Remove all helmet-managed elements from <head> |

Favicon generation

| Export | Description | | --- | --- | | generateFaviconSvg(char, options?) | SVG with dark mode via prefers-color-scheme media query | | generateStaticSvg(char, options?) | Static SVG without media queries (for touch icons) | | generateMaskSvg(char, options?) | Monochrome SVG without background (for Safari mask) | | generateManifest(config) | Web app manifest with icon entries | | faviconLinks(options?) | Array of LinkDescriptor for all favicon variants |

Types

| Type | Description | | --- | --- | | HeadConfig | Full head configuration object | | MetaDescriptor | Attributes for a <meta> element | | LinkDescriptor | Attributes for a <link> element | | FaviconConfig | Favicon generation configuration | | WebManifest | Web app manifest structure | | ManifestIcon | Icon entry in a web manifest |

License

MIT