Function selector

selector<DescElement>(selector): ((this) => DescElement)
Given the specified selector, returns a function which returns the first descendant of "this" element that matches the specified selector.

The generic refers to the type of the returned descendant element.
Type Parameters
- DescElement extends Element
Parameters
- selector: string
  A CSS selector string.
Returns ((this) => DescElement)
- - (this): DescElement
  - Parameters
    - this: BaseType
    Returns DescElement