[1] Add <slot>.assignedElements() (cyrilletuzi著, 2017-12-19 23:50:58 +09:00) https://github.com/whatwg/html/commit/b626a63647972cf70bcf1b58a1daf1347b2d3435

[2] Add an assignedElements() method · Issue #602 · w3c/webcomponents (2017-12-21 17:30:38 +09:00) https://github.com/w3c/webcomponents/issues/602

[3] Add assignedElements() method to <slot> by cyrilletuzi · Pull Request #2269 · whatwg/html (2017-12-21 17:33:39 +09:00) https://github.com/whatwg/html/pull/2269