@snippetors/vuepress-plugin-tabs/lib/utils/resize-event.js

Vuepress plugin - markdown custom container to display content in tabs

import ResizeObserver from "resize-observer-polyfill";

const isServer = typeof window === "undefined";

/* istanbul ignore next */
const resizeHandler = function (entries) {
  for (let entry of entries) {
    const listeners = entry.target.__resizeListeners__ || [];
    if (listeners.length) {
      listeners.forEach((fn) => {
        fn();
      });
    }
  }
};

/* istanbul ignore next */
export const addResizeListener = function (element, fn) {
  if (isServer) return;
  if (!element.__resizeListeners__) {
    element.__resizeListeners__ = [];
    element.__ro__ = new ResizeObserver(resizeHandler);
    element.__ro__.observe(element);
  }
  element.__resizeListeners__.push(fn);
};

/* istanbul ignore next */
export const removeResizeListener = function (element, fn) {
  if (!element || !element.__resizeListeners__) return;
  element.__resizeListeners__.splice(
    element.__resizeListeners__.indexOf(fn),
    1
  );
  if (!element.__resizeListeners__.length) {
    element.__ro__.disconnect();
  }
};