Nuxt 3 Smooth Scrolling with Hash Links

In my Nuxt.js 3 project, I want to implement single-page navigation. And I followed following articles but it didn't work. any suggestions?

• https://dev.to/dimer191996/nuxt-js-smooth-scrolling-with-hash-links-94a
• https://levelup.gitconnected.com/nuxt-js-how-to-retain-scroll-position-when-returning-to-page-without-navigation-history-7f0250886d27

The correct way to do it in Nuxt.js 3 is to create the "router.scrollBehaviour.js" file in the plugins/ directory. Its content should be

import { defineNuxtPlugin } from "#app";

export default defineNuxtPlugin((nuxtApp) => {
  nuxtApp.$router.options.scrollBehavior = async (to, from, savedPosition) => {
    if (savedPosition) {
      return savedPosition;
    }

    const findEl = async (hash, x = 0) => {
      return (
        document.querySelector(hash) ||
        new Promise((resolve) => {
          if (x > 0) {
            return resolve(document.querySelector("#app"));
          }
          setTimeout(() => {
            resolve(findEl(hash, 1));
          }, 300);
        })
      );
    };

    if (to.hash) {
      const el = await findEl(to.hash);

      if ("scrollBehavior" in document.documentElement.style) {
        console.log("hash path hit scroll to");
        return window.scrollTo({ top: el.offsetTop, behavior: "smooth" });
      } else {
        return window.scrollTo(0, el.offsetTop);
      }
    }
    return { left: 0, top: 0, behaviour: "smooth" };
  };
})