nuxt/dist/pages/runtime/router.options.js

Nuxt is a free and open-source framework with an intuitive and extendable way to create type-safe, performant and production-grade full-stack web applications and websites with Vue.js.

import { useNuxtApp } from "#app/nuxt";
import { isChangingPage } from "#app/components/utils";
import { useRouter } from "#app/composables/router";
import { appPageTransition as defaultPageTransition } from "#build/nuxt.config.mjs";
export default {
  scrollBehavior(to, from, savedPosition) {
    const nuxtApp = useNuxtApp();
    const behavior = useRouter().options?.scrollBehaviorType ?? "auto";
    let position = savedPosition || void 0;
    const routeAllowsScrollToTop = typeof to.meta.scrollToTop === "function" ? to.meta.scrollToTop(to, from) : to.meta.scrollToTop;
    if (!position && from && to && routeAllowsScrollToTop !== false && isChangingPage(to, from)) {
      position = { left: 0, top: 0 };
    }
    if (to.path === from.path) {
      if (from.hash && !to.hash) {
        return { left: 0, top: 0 };
      }
      if (to.hash) {
        return { el: to.hash, top: _getHashElementScrollMarginTop(to.hash), behavior };
      }
      return false;
    }
    const hasTransition = (route) => !!(route.meta.pageTransition ?? defaultPageTransition);
    const hookToWait = hasTransition(from) && hasTransition(to) ? "page:transition:finish" : "page:finish";
    return new Promise((resolve) => {
      nuxtApp.hooks.hookOnce(hookToWait, async () => {
        await new Promise((resolve2) => setTimeout(resolve2, 0));
        if (to.hash) {
          position = { el: to.hash, top: _getHashElementScrollMarginTop(to.hash), behavior };
        }
        resolve(position);
      });
    });
  }
};
function _getHashElementScrollMarginTop(selector) {
  try {
    const elem = document.querySelector(selector);
    if (elem) {
      return Number.parseFloat(getComputedStyle(elem).scrollMarginTop) + Number.parseFloat(getComputedStyle(document.documentElement).scrollPaddingTop);
    }
  } catch {
  }
  return 0;
}