export const createApp = (...args) => {
  // 1.创建实例
  const app = ensureRenderer().createApp(...args);

  // 2. 重写实例的 mount 方法
  const { mount } = app;
  app.mount = (containerOrSelector) => {
    const container = normalizeContainer(containerOrSelector);
    if (!container) return;

    const component = app._component;
    if (!isFunction(component) && !component.render && !component.template) {
      // __UNSAFE__
      // Reason: potential execution of JS expressions in in-DOM template.
      // The user must make sure the in-DOM template is trusted. If it's
      // rendered by the server, the template should not contain any user data.
      component.template = container.innerHTML;
      // 2.x compat check
      if (__COMPAT__ && __DEV__) {
        for (let i = 0; i < container.attributes.length; i++) {
          const attr = container.attributes[i];
          if (attr.name !== "v-cloak" && /^(v-|:|@)/.test(attr.name)) {
            compatUtils.warnDeprecation(
              DeprecationTypes.GLOBAL_MOUNT_CONTAINER,
              null
            );
            break;
          }
        }
      }
    }

    // clear content before mounting
    container.innerHTML = "";
    const proxy = mount(container, false, resolveRootNamespace(container));
    if (container instanceof Element) {
      container.removeAttribute("v-cloak");
      container.setAttribute("data-v-app", "");
    }
    return proxy;
  };

  return app;
};