JavaScript API

Package: tauri-plugin-widgets-api. Types for the widget IR are generated from Rust (guest-js/generated/widget-types.ts) — do not hand-edit them.

import {
  setWidgetConfig,
  createWidgetWindow,
  onWidgetAction,
  startWidgetUpdater,
} from "tauri-plugin-widgets-api";

Config and storage

Function	Purpose
setWidgetConfig(config, group, widgetId, skipReload?)	Push a full WidgetConfig. Returns ApplyOutcome (written, reload, transports, optional skip) — not a bare boolean
getWidgetTrace(group, { since? })	Host delivery journal + receipt history (debug / WIDGET_DEBUG=1)
flushWidgetTrace()	Flush journal to disk (desktop)
getWidgetConfig(group, widgetId)	Read the stored config
setItems(key, value, group)	Low-level key/value write shared with native widgets
getItems(key, group)	Low-level key/value read

Timelines and Android pin

Function	Purpose
reloadAllTimelines()	Ask the host to reload widget timelines
reloadTimelines(ofKind)	Reload a specific widget kind
setRegisterWidget(widgets)	Register provider class names (Android)
requestWidget()	Prompt the user to pin a widget (Android)

Desktop windows

Omit url to use the embedded renderer (widget.html inside the crate, served over widgetview). You do not copy that file into the app. Optional custom url and declarative-config caveats: Desktop webview.

Function	Purpose
createWidgetWindow(config)	Frameless transparent window; pass group, widgetId, size for the built-in renderer
closeWidgetWindow(label)	Close a window created earlier

await createWidgetWindow({
  label: "weather",
  width: 280,
  height: 160,
  group: "group.com.example.myapp",
  widgetId: "weather",
  size: "small",
});

Actions

Function	Purpose
widgetAction(action, payload?, opts?)	Emit a widget-action from the host
onWidgetAction(callback)	Subscribe to taps from button / link / list rows
pollPendingWidgetActions(group)	Drain native-queued actions (Android fallback)

Action payload: { action, payload?, ts, widgetId, group }.

Diagnostics

Function	Purpose
reportReceipt(receipt)	Native renderers report what they drew / skipped
getWidgetDiagnostics(group)	Inspect latest receipts for a group

Updater

Function	Purpose
startWidgetUpdater(builder, group, widgetId, options?)	Periodically rebuild and push config; returns a stop function

See Updating data for WidgetKit reload budget notes.

Rust

Host-side API: Rust API · docs.rs.