Function map

src/ElementChildren.tsx:11–20

* Iterates through children that are typically specified as `props.children`, * but only maps over children that are "valid elements". * * The mapFunction provided index will be normalised to the components mapped, * so an invalid component would not increase the index. *

(
  children,
  func: (el: React.ReactElement<P>, index: number) => any,
)

 *
 */
function map<P = any>(
  children,
  func: (el: React.ReactElement<P>, index: number) => any,
) {
  let index = 0;

  return React.Children.map(children, (child) =>
    React.isValidElement<P>(child) ? func(child, index++) : child,
  );
}

/**
 * Iterates through children that are "valid elements".