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GrabarzUndPartner/nuxt-font-loader-strategy

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nuxt-font-loader-strategy

⚠️ This project is no longer maintained, because the concept is not suitable for global management of many fonts in larger projects. For this reason we have developed a new concept that guarantees smart, efficient and performant component-based font management even in larger websites. Please visit: https://github.com/GrabarzUndPartner/nuxt-speedkit

Grabarz & Partner - Module

Main

npm version npm downloads Renovate - Status License

Helps to load the fonts and activate them by preloading.

nuxt-font-loader-strategy helps loading the fonts and provides a loading strategy based on preloads.

Define yourself which fonts will be unlocked first.
This gives the best experience in the initial viewport of the website.

Features:

  • Use preload to prevent font flashs.
  • Generates the @font-face definitions automatically and includes them in the layout.
  • Increases the Pagespeed Insight Score 🎉
  • Take the fonts from Minimize critical request depth and load them via WebWorker.
  • Deactivate fonts at low connection. (Show Browser-Support)

⚠️ Configuration of the fonts must be included only in the module settings.

📖 Release Notes

Setup

  1. Add nuxt-font-loader-strategy dependency to your project
yarn add nuxt-font-loader-strategy # or npm install nuxt-font-loader-strategy
  1. Add nuxt-font-loader-strategy to the modules section of nuxt.config.js
{ modules: [ ['nuxt-font-loader-strategy', { ignoreLighthouse: true, ignoredEffectiveTypes: ['2g', 'slow-2g'], fonts: [ // Font { fileExtensions: ['woff2', 'woff'], fontFamily: 'Font A', fontFaces: [ // Font-Face { preload: true, localSrc: ['Font A', 'FontA-Regular'], src: '@/assets/fonts/font-a-regular', fontWeight: 400, fontStyle: 'normal' }, // Font-Face { localSrc: ['Font A Light', 'FontA-Light'], src: '@/assets/fonts/font-a-300', fontWeight: 300, fontStyle: 'normal' }, // Font-Face { localSrc: ['Font A Light Italic', 'FontA-LightItalic'], src: '@/assets/fonts/font-a-300Italic', fontWeight: 300, fontStyle: 'Italic' } ] }, // Font { fileExtensions: ['woff2', 'woff'], fontFamily: 'Font B', fontFaces: [ // Font-Face { preload: true, src: '@/assets/fonts/font-b-regular', fontWeight: 400, fontStyle: 'normal' }, // Font-Face { src: '@/assets/fonts/font-b-700', fontWeight: 700, fontStyle: 'normal' } ] } ] }] ] }

Options

Property Type Description Default
useWorker Boolean If set, the non-preloads (prefetches) are loaded via WebWorker. false
ignoreLighthouse Boolean If set, the non-preloads (prefetches) in Lighthouse are disabled (ignored). false
classPattern Boolean Font css class pattern. [family]_[weight]_[style]
importPathResolve Function Path resolve for font src: url(fontPath) Replace @/ to ~
requirePathResolve Function Path resolve for require(fontPath) no changes
ignoredEffectiveTypes Array List of excluded connection types. []
fonts Array List of included fonts. []
unlockDelay Number Delay in milliseconds for unlock prefetched fonts. 0
prefetchCount Number Defines how many fonts are prefetched at the same time.
Important: Lower than zero, everything is loaded at once.
2

Maximum expression classPattern

[family]_[variant]_[featureSettings]_[stretch]_[weight]_[style]

WebWorker useWorker

Look for compactability at https://github.com/webpack-contrib/worker-loader.

WebWorker is executed with the setting inline to reduce the script loads.

Font

Property Type Description Default
fileExtensions Array Font-Family Name ['woff2', 'woff']
fontFamily String Font-Family Name ['2g', 'slow-2g']
fontFaces Array Font-Faces []

Font-Face

Property Type Description Default
preload Boolean Specifies whether font is loaded as preload. false
local Array List of local font names (System, etc.). []
src Array File Path without extension. null
fontVariant String CSS-Prop. font-variant 'normal'
fontFeatureSettings String CSS-Prop. font-feature-settings 'normal'
fontStretch String CSS-Prop. font-stretch 'normal'
fontWeight Number CSS-Prop. font-weight 'normal'
fontStyle String CSS-Prop. font-style 'normal'
fontDisplay String CSS-Prop. font-display 'swap'

⚠️ The first fileExtensions entry is used as preload.

Usage

On the HTML tag a class is set for each font file. This class then activates the set styles in the CSS.

The name of the font is specified in SnakeCase. (Example: Open Sans -> open_sans)

It is recommended to normalize the used tags.

Example: h1 has font-weight: bold as standard.

p { font-family: sans-serif; } html.font_open_sans p { font-family: 'Roboto', sans-serif; }

For additional FontFaces, classes switch with the options weight and style.

p { font-family: sans-serif; } html.font_roboto_400_normal p.bold { font-family: 'Roboto', sans-serif; font-style: normal; font-weight: 400; } p.bold { font-family: sans-serif; font-style: normal; font-weight: 700; } html.font_roboto_700_normal p.bold { font-family: 'Roboto', sans-serif; } p.light { font-family: sans-serif; font-style: normal; font-weight: 300; } html.font_roboto_300_normal p.light { font-family: 'Roboto', sans-serif; } p.italic { font-family: sans-serif; font-style: italic; font-weight: 400; } html.font_roboto_400_italic p.italic { font-family: 'Roboto', sans-serif; }

Browser Performance

alt text

Preview

Development

  1. Clone this repository
  2. Install dependencies using yarn install or npm install
  3. Start development server using npm run dev

Browser-Support

Preload Fonts

The options preload and prefetch are required for the link tag.

Not all browsers support this:

If not supported, all fonts are activated.

Deactivate fonts at low connection

Connection speed dependent font loading, requires the support of navigator.connection.effectiveType.

Can I use - effectivetype

License

MIT License