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Web Platform Baseline Status Breakdown Total Features: 1219
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2026

1 features
• May 2026

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.

Chrome 140
Firefox 145
Safari 26.5
Edge 140
Baseline Date: May 11, 2026

2025

1 features
• January 2025
Newly Available

The popover HTML attribute creates an overlay to display content on top of other page content. Popovers can be shown declaratively using HTML, or using the showPopover() method.

Chrome 116
Firefox 125
Safari 17
Edge 116
Baseline Date: Jan 27, 2025