RESOLVED DUPLICATE of bug 199733 204559
Dynamically inserting a slot element after the slot content does not work 
https://bugs.webkit.org/show_bug.cgi?id=204559
Summary Dynamically inserting a slot element after the slot content does not work
jogibear9988
Reported 2019-11-24 14:33:51 PST
Webcomponents dynamic added slots do not work see code on https://jsfiddle.net/t2z4kp3n/1/ Result is DivA DivB DivC but should be DivA DivB DivC DivD If you change order of 16-18 from let slot = document.createElement("slot"); slot.name = "d"; shadowRoot.appendChild(slot); to let slot = document.createElement("slot"); shadowRoot.appendChild(slot); slot.name = "d"; it works as expected. Also look in chrome, it works as it should
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jogibear9988
Comment 1 2019-11-24 14:52:39 PST
If you add the slot in the same cycle as you add the content but after it, the content will not be shown in the slot. If you assign the name to the slot after adding it, it would work
Radar WebKit Bug Importer
Comment 2 2019-11-24 22:34:30 PST
<rdar://problem/57465685>
Ryosuke Niwa
Comment 3 2019-11-25 14:06:12 PST
Doesn't reproduce in STP96. I'm pretty sure this is a duplicate of 199733. *** This bug has been marked as a duplicate of bug 199733 ***
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