router.scrollBehavior.js

if (process.client) {
  if ('scrollRestoration' in window.history) {
    window.history.scrollRestoration = 'manual'
// reset scrollRestoration to auto when leaving page, allowing page reload
    // and back-navigation from other pages to use the browser to restore the
    // scrolling position.
    window.addEventListener('beforeunload', () => {
      window.history.scrollRestoration = 'auto'
    })
// Setting scrollRestoration to manual again when returning to this page.
    window.addEventListener('load', () => {
      window.history.scrollRestoration = 'manual'
    })
  }
}
export default function (to, from, savedPosition) {
  let position;
//Your Code Starts Here
position = savedPosition || { x: 0, y: 0 };
//Your Code Ends Here
const nuxt = window.<%= globals.nuxt %>;
// triggerScroll is only fired when a new component is loaded
  if (to.path === from.path && to.hash !== from.hash) {
    nuxt.$nextTick(() => nuxt.$emit('triggerScroll'))
  }
return new Promise((resolve) => {
    // wait for the out transition to complete (if necessary)
    nuxt.$once('triggerScroll', () => {
      console.log("Trigger ScrollBehavior")
      // coords will be used if no selector is provided,
      // or if the selector didn't match any element.
      if (to.hash) {
        let hash = to.hash
        // CSS.escape() is not supported with IE and Edge.
        if (typeof window.CSS !== 'undefined' && typeof window.CSS.escape !== 'undefined') {
          hash = '#' + window.CSS.escape(hash.substr(1))
        }
        try {
          if (document.querySelector(hash)) {
            // scroll to anchor by returning the selector
            position = { selector: hash }
          }
        } catch (e) {
          console.warn('Failed to save scroll position. Please add CSS.escape() polyfill (https://github.com/mathiasbynens/CSS.escape).')
        }
      }
      resolve(position)
    })
  })
}