Web platform features explorer - ToggleEvent source

The source property of a ToggleEvent object is the element which triggered the toggle event to fire for a popover, <dialog>, or <details> element, if applicable.

Status

Baseline Newly Available (since 2026-05-11)

This feature is expected to reach Baseline Widely Available status on: 2028-11-11

MDN documentation

ToggleEvent: source property

Specifications

HTML (#dom-toggleevent-source), from HTML Workstream (WHATWG).

Browser support

Chrome 140 Released on 2025-09-02
Chrome Android 140 Released on 2025-09-02
Edge 140 Released on 2025-09-05
Firefox 145 Released on 2025-11-11
Firefox for Android 145 Released on 2025-11-11
Safari 26.5 Released on 2026-05-11
Safari on iOS 26.5 Released on 2026-05-11

Web Platform Tests (WPT)

View the latest WPT test results for this feature

View as JSON | Edit this feature | Report an issue | Web-features entry: source, dist