Vue Router - 滚动时更改路由中的锚点 [英] Vue Router - Change anchor in route on scroll

问题描述

我基本上试图在我的网站上拥有与此处完全相同的路由行为:https://router.vuejs.org/guide/#html.请注意，当您向下滚动时，链接会更改为 https://router.vuejs.org/guide/#javascript.向上滚动，反之亦然.重新加载页面时，您的位置将被保存.

我向路由器添加了以下滚动行为:

 scrollBehavior(to, from, savedPosition) {如果(to.hash){返回 { 选择器:to.hash }} else if (savedPosition) {返回保存位置；} 别的 {返回 { x: 0, y: 0 }}

现在我可以跳转到带有链接的锚点，并且路线会发生变化.这就是我所了解的.以 Vue Router 网站为例有点讽刺，但无论如何 - 我怎样才能复制它的行为?

解决方案

您可以设置一个 IntersectionObserver 并观察页面上的所有部分.当一个部分进入视图时，获取该部分的 id 并更新路由:

...
<div class="section"id="javascript">...

data() {返回 {部分观察者:空}},挂载(){this.observeSections()},方法: {观察部分(){尝试 {this.sectionObserver.disconnect()} 捕捉(错误){}常量选项 = {rootMargin: '0px 0px',阈值:0}this.sectionObserver = new IntersectionObserver(this.sectionObserverHandler, options)//观察每个部分const 部分 = document.querySelectorAll('.section')section.forEach(section => {this.sectionObserver.observe(section)})},sectionObserverHandler(条目){for (const 条目) {如果(entry.isIntersecting){const sectionId = entry.target.id//在这里推送 sectionId 到路由器this.$router.push({ name: this.$route.name, hash: `#${sectionId}` })}}}}

正如评论中提到的@Sigi，您可以在中使用this.$router.replace()代替this.$router.push()>sectionObserverHandler，避免混淆历史.

I am basically trying to have the exact same routing behaviour on my site as here: https://router.vuejs.org/guide/#html. Notice when you scroll down the link changes to https://router.vuejs.org/guide/#javascript. Scroll back up and it is vice versa. When reloading the page your position gets saved.

I added the following scroll behavior to my router:

  scrollBehavior(to, from, savedPosition) {
    if (to.hash) {
        return { selector: to.hash }
    } else if (savedPosition) {
        return savedPosition;
    } else {
        return { x: 0, y: 0 }
    }

Now I can jump to an anchor with a link and the route changes. That's about as far as I get. Kind of ironic to pick the Vue Router website as an example, but anyway - how can I replicate its behaviour?

解决方案

You could set up an IntersectionObserver and observe all sections on the page. When a section enters the view, take the section's id and update the route:

<div class="section" id="html">
  ...
</div>

<div class="section" id="javascript">
  ...
</div>

data () {
  return {
    sectionObserver: null
  }
},
mounted () {
  this.observeSections()
},
methods: {
  observeSections() {
    try {
      this.sectionObserver.disconnect()
    } catch (error) {}

    const options = {
      rootMargin: '0px 0px',
      threshold: 0
    }
    this.sectionObserver = new IntersectionObserver(this.sectionObserverHandler, options)
  
    // Observe each section
    const sections = document.querySelectorAll('.section')
    sections.forEach(section => {
      this.sectionObserver.observe(section)
    })
  },
  sectionObserverHandler (entries) {
    for (const entry of entries) {
      if (entry.isIntersecting) {
         const sectionId = entry.target.id
         // Push sectionId to router here 
         this.$router.push({ name: this.$route.name, hash: `#${sectionId}` })
      }
    }
  }
}

As @Sigi mentioned in the comment, you can use this.$router.replace() instead of this.$router.push() in the sectionObserverHandler, to avoid cluttering the history.

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