Element.slot - Web APIs |

mdn slot Slots are identified by their name attribute, and allow you to define placeholders in your template that can be filled with any markup fragment you want when the element is used. The slot> HTML element—part of the Web Components technology suite—is a placeholder inside a web component that you can fill with your own markup, which lets you create separate

mdnsport live chat, The slot property of the Element interface returns the name of the shadow DOM slot the element is inserted.