The HTMLSlotElement interface of the Shadow DOM API enables access to the name and assigned nodes of an HTML <slot> (en-US) element.

Properties (en-US)
DOMString: Can be used to get and set the slot's name.


Returns the sequence of elements assigned to this slot, or alternatively the slot's fallback content.


The following snippet is taken from our slotchange example (see it live also).

let slots = this.shadowRoot.querySelectorAll('slot');
slots[1].addEventListener('slotchange', function(e) {
  let nodes = slots[1].assignedNodes();
  console.log('Element in Slot "' + slots[1].name + '" changed to "' + nodes[0].outerHTML + '".');

Here we grab references to all the slots, then add a slotchange event listener to the 2nd slot in the template — which is the one that keeps having its contents changed in the example.

Every time the element inserted in the slot changes, we log a report to the console saying which slot has changed, and what the new node inside the slot is.


Browser compatibility

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