Alternatives and similar repositories for demos:

Users that are interested in demos are comparing it to the libraries listed below

• zachleat / resizeasaurus
  A web component to add resizing behavior to test intrinsically sized responsive components.
  ☆32Updated last year
• webcompat / browser-compat-bugs
  Repository for Web Developers to report bugs with interop bugs in browsers
  ☆24Updated 2 years ago
• dbaron / details-styling
  Proposal for improving styling of the HTML details element
  ☆12Updated 3 months ago
• macdonst / js-naked-day.org
  ☆14Updated 5 months ago
• break-stuff / cem-plugin-vs-code-custom-data-generator
  A custom elements manifest analyzer plugin to generate a custom data file for VS Code.
  ☆19Updated last year
• foldable-devices / viewportsegments-polyfill
  ☆22Updated last year
• natemoo-re / tiny-decode
  Decode HTML entities the browser-friendly way
  ☆17Updated 2 years ago
• prettier / prettier-cli
  A faster CLI for Prettier.
  ☆33Updated this week
• break-stuff / wc-dox
  A web component API documentation generator
  ☆11Updated last month
• thepassle / rollup-plugin-native-css-modules
  Use native CSS modules with import assertions in Rollup, without transforming CSS to JS.
  ☆20Updated last year
• fabiospampinato / zeptomatch
  An absurdly small glob matcher that packs a punch.
  ☆46Updated this week
• fregante / web-ext-submit
  Wrapper around Mozilla’s web-ext to submit extensions to AMO.
  ☆34Updated last year
• web-platform-dx / developer-research
  Development of research on developer needs to inform improvements in Web Platform Developer Experience
  ☆31Updated 3 weeks ago
• color-js / elements
  A collection of color-related web components. WIP.
  ☆23Updated last month
• webcomponents / template-shadowroot
  ☆39Updated 3 weeks ago
• 11ty / eleventy-plugin-directory-output
  Group and sort Eleventy’s verbose output by directory (and show file size with benchmarks)
  ☆20Updated 3 years ago
• break-stuff / cem-plugin-jet-brains-ide-integration
  A custom elements manifest analyzer plugin to generate configuration files for web component integration with JetBrains IDEs
  ☆11Updated last year
• dgp1130 / HydroActive
  An experimental library for hydrating web components and adding "sprinkles of reactivity" to pre-rendered HTML.
  ☆22Updated 2 months ago
• WebReflection / p-cool
  Pretty Cool Elements
  ☆37Updated 2 years ago
• KonnorRogers / light-pen
  A lightweight codepen implementation using web components
  ☆19Updated last month
• proteanstudio / contrast-tools
  ☆18Updated last year
• oddbird / css-toggles
  CSS Toggles demo and polyfill
  ☆59Updated last week
• dbaron / container-queries-implementability
  Proposal for container queries designed to be implementable in web browsers
  ☆45Updated last year
• WebReflection / umeta
  A micro helper for import.meta data.
  ☆32Updated last year
• guybedford / chomp-extensions
  Chomp template collection
  ☆12Updated 10 months ago
• fregante / webext-polyfill-kinda
  Super-lightweight Promised wrapper around `chrome.*` API to be used in modules. Prefer `webextension-polyfill` if you’re using it directl…
  ☆12Updated last year
• chriscoyier / practical-svg
  ☆30Updated 6 months ago
• NotWoods / color-breakdown
  Extract prominent colors from an image with this PWA tool.
  ☆10Updated 2 years ago
• tabatkins / css-toggle
  Proposal for a CSS Toggle spec
  ☆28Updated 11 months ago
• stefanjudis / browsers.fyi
  Get browser versions as website or abpi
  ☆35Updated 2 years ago