generated: '2026-07-21'
method: searched
source: https://dev.streamelements.com/docs/overlays
note: 'Client-side/embeddable surfaces distinct from server SDKs: StreamElements custom overlay widgets
  rendered in the Overlay Editor, driven by native browser events and the in-widget SE_API.'
families:
- name: Custom Overlay Widgets
  description: HTML/CSS/JS widgets rendered inside overlays; receive native events (onWidgetLoad, onEventReceived,
    onSessionUpdate).
  docs: https://dev.streamelements.com/docs/overlays/custom-widget
  events:
  - onWidgetLoad
  - onEventReceived
  - onSessionUpdate
- name: SE_API
  description: In-widget JavaScript API available to custom widgets for store/session/kv operations.
  docs: https://dev.streamelements.com/docs/overlays
- name: AlertBox custom code
  description: Custom code injection points in the AlertBox widget.
  docs: https://dev.streamelements.com/docs/overlays/custom-code-in-alertbox
- name: Leaderboard Extension
  description: Embeddable leaderboard extension (tracked on the status page).
loaders:
- name: widgets
  repo: https://github.com/StreamElements/widgets
  description: Open-source StreamElements widgets library.