@openmrs/esm-styleguide/src/spinner/index.ts

The styleguide for OpenMRS SPA

/** @module @category UI */

export function renderLoadingSpinner(target: HTMLElement) {
  const template = document.querySelector<HTMLTemplateElement>('template#loading-spinner');

  if (template) {
    const frag = template.content.cloneNode(true);
    const refs = Array.prototype.map.call(frag.childNodes, (m: HTMLElement) => m);
    target.appendChild(frag);
    return () => refs.forEach((child: ChildNode) => child.remove());
  }

  return () => {};
}