Globals & lifecycle

Globals

Global	What it is
`fieldData`	Values of your fields, defaults merged with the streamer’s overrides.
`StreamWizard.state`	`get()` / `set()` persistence, see state.
`StreamWizard.session`	`{ subscriberToken, overlayItemId }` once the widget runs on an overlay; `null` in the editor preview.
`StreamWizard.stateUrl`	Raw state endpoint. Prefer `StreamWizard.state`.
`gsap`	GSAP 3.12 animation library.
`TextPlugin`	GSAP text animation; call `gsap.registerPlugin(TextPlugin)` first.

Lifecycle events

All three arrive as DOM CustomEvents on window.

`onWidgetLoad`

Fires once when the widget mounts.

addEventListener('onWidgetLoad', (e) => {
  const { fieldData, channel, session } = e.detail;
  // channel.user_id: the broadcaster's Twitch user ID
  // session: { subscriberToken, overlayItemId } or undefined in the preview
});

`onEventReceived`

Every live event. detail.listener names the event, detail.event is the payload. The full catalog with exact payload shapes lives in the event reference.

addEventListener('onEventReceived', (e) => {
  const { listener, event } = e.detail;
  if (listener === 'channel.cheer') {
    console.log(`${event.user_name} cheered ${event.bits} bits`);
  }
});

`onSessionUpdate`

Reserved. Nothing emits it today; don’t build on it.

Bundled libraries

Tailwind CSS via CDN: use utility classes directly in your HTML.
GSAP 3.12.5 + TextPlugin: timelines, easings, text animation.

No other external scripts load, and the sandbox blocks adding your own script tags from other origins. fetch() works against the StreamWizard state API, your media library files, and the weather/geocoding APIs used by IRL widgets.

The editor knows all of this

The JS tab autocompletes every global, event name, and payload field on this page. When in doubt, type e.detail. and read what comes up.

Build widgets

API reference

Recipes

Globals

Lifecycle events

`onWidgetLoad`

`onEventReceived`

`onSessionUpdate`

Bundled libraries

The editor knows all of this

​Globals

​Lifecycle events

​onWidgetLoad

​onEventReceived

​onSessionUpdate

​Bundled libraries

​The editor knows all of this

Globals

Lifecycle events

`onWidgetLoad`

`onEventReceived`

`onSessionUpdate`

Bundled libraries

The editor knows all of this