feat: better hash locate behavior

Author: ulivz

packages/@vuepress/core/lib/app/root-mixins/updateLoadingState.js

@@ -2,11 +2,38 @@ export default {
   created () {
     this.$vuepress.$on('AsyncMarkdownContentMounted', () => {
       this.$vuepress.$set('contentMounted', true)
+
+      document.querySelectorAll('a[href^="#"]').forEach(anchor => {
+        anchor.addEventListener('click', function (e) {
+          console.log(e)
+          e.preventDefault()
+          window.scroll({
+            top: e.target.offsetTop - 75,
+            left: 0,
+            behavior: 'smooth'
+          })
+        })
+      })
+
+      if (this.$route.hash) {
+        try {
+          const anchor = document.getElementById(this.$route.hash.slice(1))
+          const anchorLink = anchor.querySelector('a.header-anchor')
+          console.log(anchorLink.offsetTop - 70)
+          window.scroll({
+            top: anchorLink.offsetTop - 70,
+            left: 0,
+            behavior: 'auto'
+          })
+        } catch (e) {
+          console.error(e)
+        }
+      }
     })
   },
 
   watch: {
-    $page () {
+    '$route.path' () {
       this.$vuepress.$set('contentMounted', false)
     }
   }

packages/@vuepress/plugin-active-header-links/mixin.js

@@ -41,11 +41,21 @@ function getAnchors () {
     })
 }
 
+let freezeScrollEvent = false
+
 export default {
+  watch: {
+    '$route.path' () {
+      console.log('$route.path changed')
+      freezeScrollEvent = true
+    }
+  },
+
   mounted () {
     this.$vuepress.$on('AsyncMarkdownContentMounted', (slotKey) => {
+      freezeScrollEvent = false
       if (slotKey === 'default') {
-        window.addEventListener('scroll', this.onScroll)
+        window.addEventListener('scroll', () => this.onScroll(freezeScrollEvent))
       }
     })
 
@@ -66,7 +76,10 @@ export default {
   },
 
   methods: {
-    onScroll: throttle(function () {
+    onScroll: throttle(function (freezeScrollEvent) {
+      if (freezeScrollEvent) {
+        return
+      }
       const anchors = getAnchors()
       if (anchors.length === 0) {
         return