mastodon/app/views/layouts/application.html.haml

!!! 5
%html{ lang: I18n.locale }
  %head
    %meta{ charset: 'utf-8' }/
    %meta{ name: 'viewport', content: 'width=device-width, initial-scale=1' }/

    - if cdn_host?
      %link{ rel: 'dns-prefetch', href: cdn_host }/
      %meta{ name: 'cdn-host', content: cdn_host }/

    - if storage_host?
      %link{ rel: 'dns-prefetch', href: storage_host }/

    - SiteUpload::FAVICON_SIZES.each do |size|
      %link{ rel: 'icon', sizes: "#{size}x#{size}", href: favicon_path(size.to_i) || frontend_asset_path("icons/favicon-#{size}x#{size}.png"), type: 'image/png' }/

    - SiteUpload::APPLE_ICON_SIZES.each do |size|
      %link{ rel: 'apple-touch-icon', sizes: "#{size}x#{size}", href: app_icon_path(size.to_i) || frontend_asset_path("icons/apple-touch-icon-#{size}x#{size}.png") }/

    - if use_mask_icon?
      %link{ rel: 'mask-icon', href: frontend_asset_path('images/logo-symbol-icon.svg'), color: '#6364FF' }/
    %link{ rel: 'manifest', href: manifest_path(format: :json) }/
    = theme_color_tags current_theme
    %meta{ name: 'apple-mobile-web-app-capable', content: 'yes' }/

    %title= html_title

    = theme_style_tags current_theme
    -# Needed for the wicg-inert polyfill. It needs to be on it's own <style> tag, with this `id`
    = stylesheet_pack_tag 'inert', media: 'all', crossorigin: 'anonymous', id: 'inert-style'

    = javascript_pack_tag 'common', crossorigin: 'anonymous'
    = preload_pack_asset "locale/#{I18n.locale}-json.js"
    = csrf_meta_tags unless skip_csrf_meta_tags?
    %meta{ name: 'style-nonce', content: request.content_security_policy_nonce }

    = stylesheet_link_tag custom_css_path, skip_pipeline: true, host: root_url, media: 'all'

    = yield :header_tags

  %body{ class: body_classes }
    = content_for?(:content) ? yield(:content) : yield

    .logo-resources{ 'tabindex' => '-1', 'inert' => true, 'aria-hidden' => 'true' }
      = inline_svg_tag 'logo-symbol-icon.svg'
      = inline_svg_tag 'logo-symbol-wordmark.svg'