vanillajs-browser-helpers/insertBefore.d.ts

Collection of convenience code snippets (helpers) that aims to make it a little easier to work with vanilla JS in the browser

/**
 * Inserts DOM element or plain HTML before a given DOM element
 *
 * @param elm - The DOM element to insert elements before
 * @param insertElm - DOM element or HTML (or selector) to insert
 * @return The inserted element
 */
export default function insertBefore(elm: Element, insertElm: string | Element): Element | null;