Vue2 extend 全局方法在vue3.0 怎么实现，下面是我v2的代码

export default function createDialogFun (Component) {
  return (options) => {
    return new Promise((resolve, reject) => {
      const ComponentConstructor = Vue.extend(Component);
      ComponentConstructor.prototype.$resolve = function (params) {
        destroyInstance();
        resolve(params);
      };
      ComponentConstructor.prototype.$reject = function (params) {
        destroyInstance();
        reject(params);
      };
      let instance = new ComponentConstructor(Object.assign({ el: document.createElement('div'), i18n }, options));
      function destroyInstance () {
        document.body.removeChild(instance.$el);
        instance.$destroy();
        instance = null;
      }
      document.body.appendChild(instance.$el);
    });
  }
}