Description

The ability to imperatively assign content to a <slot> element is available in Chrome and Firefox, and while merged in WebKit not currently available in Safari.

Rationale

Some of the scenarios called out in the proposal include not having to pre-compute the slot names ahead of time, as well as being able to conditionally load content into a slot.

Specification

whatwg/html#6561

Tests

• In WPT: https://wpt.fyi/results/shadow-dom/slots-imperative-slot-api.tentative.html?label=master&label=experimental&aligned&q=slots-imperative-slot-api.tentative.html
• In WPT: https://wpt.fyi/results/shadow-dom/slots