feat: publicize doc implemetation

app/router.scrollBehavior.js

@@ -0,0 +1,23 @@
+export default function scrollBehavior (to) {
+  // if the returned position is falsy or an empty object,
+  // will retain current scroll position.
+  let position = false
+
+  // if no children detected
+  if (to.matched.length < 2) {
+    // scroll to the top of the page
+    position = { x: 0, y: 0 }
+  } else if (
+    to.matched.some(r => r.components.default.options.scrollToTop)
+  ) {
+    // if one of the children has scrollToTop option set to true
+    position = { x: 0, y: 0 }
+  } else if (
+    to.hash &&
+    document.querySelector(decodeURIComponent(to.hash))
+  ) {
+    // scroll to anchor by returning the selector
+    position = { selector: to.hash }
+  }
+  return position
+}