Function isElement

isElement<Name extends keyof HTMLElementTagNameMap>(
name: Name,
item: unknown,
): item is HTMLElementTagNameMap[Name]
Given the name of a custom DOM element registered in Window.customElements, test whether an object is an instance of that element.

The element must also be declared in HTMLElementTagNameMap for the type checker to follow along.
Type Parameters
- Name extends keyof HTMLElementTagNameMap
Parameters
- name: Name
- item: unknown
Returns item is HTMLElementTagNameMap[Name]
- Defined in src/dom.ts:24