# Comcast — client-side UI component surface
#
# OWNERSHIP FIRST. The Lightning packages below are published from the same
# rdkcentral GitHub organization that hosts Firebolt, by the same corporate
# family: the npm maintainers of record are Metrological staff addresses
# (e.g. e.haandrikman@metrological.com), and Metrological is a Comcast company.
# Comcast's own developer docs present Lightning as the framework for building
# on its platform — "Intro to Lightning" and "Development Stack & Tools" both
# direct app developers to it, and the official Hello World guide makes it a
# required dependency of the Firebolt starter project.
#
# What this artifact is NOT: an embeddable-widget or hosted-checkout surface.
# Comcast ships no drop-in web components for third-party sites. These are the
# on-device UI building blocks for apps that run ON Comcast set-top boxes.
generated: '2026-09-05'
method: searched
source: >-
  https://docs.developer.comcast.com/docs/lightning-for-xfinity,
  https://docs.developer.comcast.com/docs/development-stack-tools,
  https://docs.developer.comcast.com/docs/hello-world-guide,
  https://docs.developer.comcast.com/docs/quick-launch-template (all HTTP 200,
  fetched 2026-09-05); registry.npmjs.org metadata
provider: Comcast
providerId: comcast
families:
  - id: lightning
    name: Lightning
    kind: WebGL/Canvas2D UI framework
    homepage: http://www.lightningjs.io/
    repository: https://github.com/rdkcentral/Lightning
    docs: https://docs.developer.comcast.com/docs/lightning-for-xfinity
    official: true
    ownership_note: >-
      rdkcentral-hosted, maintained by Metrological (a Comcast company).
      Documented by Comcast as the recommended framework for its platform.
    description: >-
      Open-source WebGL/JavaScript UI framework built for high-quality UI
      rendering on memory-constrained set-top boxes. Comcast's docs state it
      outperforms DOM-based frameworks on this hardware because it renders
      through WebGL and Canvas2D rather than DOM elements.
    packages:
      - name: '@lightningjs/ui-components'
        registry: npm
        version: 2.25.1
        published: '2024-12-03'
        repository: https://github.com/rdkcentral/Lightning-UI-Components
        role: The component library — the actual reusable UI elements.
      - name: '@lightningjs/ui'
        registry: npm
        version: 1.3.19
        published: '2023-12-11'
        repository: https://github.com/rdkcentral/Lightning-ui
        role: Earlier UI element library.
      - name: '@lightningjs/sdk'
        registry: npm
        version: 5.5.7
        published: '2026-02-10'
        role: The Lightning app SDK (app shell, router, media, locale).
    currency_note: >-
      The SDK is current (2026-02-10) but both component libraries are stale
      relative to it — @lightningjs/ui-components last published 2024-12-03 and
      @lightningjs/ui 2023-12-11. Read that as an SDK moving faster than its
      component layer, not as an abandoned framework.
  - id: quick-launch-template
    name: Quick Launch Template (QLT)
    kind: platform-hosted prebuilt surface
    docs: https://docs.developer.comcast.com/docs/quick-launch-template
    official: true
    description: >-
      A Comcast-platform splash-screen technology that lets an app provider
      self-serve the launch experience — background images, foreground images,
      animations and text — with two experience types to choose from. Rendered
      by the platform, not by the app, which is what makes it a prebuilt
      surface rather than a library.
    note: >-
      QLT apps carry additional GPU memory constraints in the Inactive state
      (requirements QS-03 and QS-06). See rate-limits/comcast-rate-limits.yml.
  - id: firebolt-hello-world
    name: Firebolt Hello World starter
    kind: starter template
    repository: https://github.com/rdkcentral/firebolt-hello-world
    docs: https://docs.developer.comcast.com/docs/hello-world-guide
    official: true
    description: >-
      The official starter project the Hello World guide clones. Combines a
      Lightning app shell with @firebolt-js/sdk and demonstrates importing the
      Device and Lifecycle modules.
embeddable_for_third_party_sites: false
maintainers:
  - FN: Kin Lane
    email: kin@apievangelist.com