@los.dev/v-md-editor/es/utils/resize-event.js

A markdown editor built on Vue

// Modified from https://github.com/ElemeFE/element/blob/dev/src/utils/resize-event.js

/* eslint-disable no-underscore-dangle */
import ResizeObserver from 'resize-observer-polyfill';
var isServer = typeof window === 'undefined';
/* istanbul ignore next */

var resizeHandler = function resizeHandler(entries) {
  entries.forEach(function (entry) {
    var listeners = entry.target.__resizeListeners__ || [];

    if (listeners.length) {
      listeners.forEach(function (fn) {
        fn();
      });
    }
  });
};
/* istanbul ignore next */


export var addResizeListener = function addResizeListener(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 var removeResizeListener = function removeResizeListener(element, fn) {
  if (!element || !element.__resizeListeners__) return;

  element.__resizeListeners__.splice(element.__resizeListeners__.indexOf(fn), 1);

  if (!element.__resizeListeners__.length) {
    element.__ro__.disconnect();
  }
};