How can I tell if a component received slot content?

How can I tell if a component received slot content? slot element The basic premise of the slot toggling works fine, it might just be the specific element you're using; some system lightning components don slot art This element includes the global attributes name The slot's name A named slot is a slot> element with a name attribute Examples template id=element

slot art Usually, if an element has shadow DOM, then its light DOM is not displayed Slots allow to show elements from light DOM in specified places of

slot de los goonies The slot> element is a slot outlet that indicates where the parent-provided slot content should be rendered slot diagram And the final rendered DOM: html  A web component can use a slot by just using the slot element Here's an example: h1>I'm a headerh1> p>Here's my slot: slot name=testslot