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  • vue使用原生js实现滚动页面跟踪导航高亮

    监听滚动页面事件,对比当前页面的位置与元素的位置,如果当前滚动的区域位置大于元素的位置,导航添加class,其他去掉class进行样式切换。

    我使用的方法是在定位元素上添加id,在导航添加

    html结构

    main.vue

    
    <template>
      <div class="qz-home">
        <div class="quiz-container">
          <div class="quiz-ad-pic" id="pagetop"></div>
          <div class="quiz-main">
            <div class="quiz-main-inside" id="js-content">
              <quiz-sessions class="item" id="quizhall"></quiz-sessions>
              <quizRecords class="item" id="quizrecord"></quizRecords>
              <quiz-history class="item" id="quizHistory"></quiz-history>
              <quiz-mine class="item" id="quizMine"></quiz-mine>
              <quiz-rank class="item" id="quizRank"></quiz-rank>
              <quiz-rule class="item" id="quizRule"></quiz-rule>
            </div>
          </div>
          <navigation id="js-nav"></navigation>
        </div>
      </div>
    </template>
    
    

    navigation.vue

    
    <template>
      <nav class="nav-container">
        <div class="nav-mark"></div>
        <div class="nav-main">
          <ul class="nav-list">
            &lt;li :class="{'cur': curindex === index}" v-for="(item, index) in navList" :key="index" :javascript</p>
    
    

    export default {
    name: "Navigation",
    data() {
    return {
    navList: [
    { name: "竞猜大厅", id: "quizhall" },
    { name: "竞猜记录", id: "quizrecord" },
    { name: "历史赛事", id: "quizHistory" },
    { name: "我的竞猜", id: "quizMine" },
    { name: "排行榜", id: "quizRank" },
    { name: "玩法", id: "quizRule" }
    ],
    curindex: 0
    };
    },
    mounted() {
    this.initScroll();
    },
    methods: {
    initScroll() {
    let _this = this;
    // 监听页面滚动事件
    window.addEventListener('scroll', function() {
    var removeClass = function(obj, cls) {
    if (obj.className == cls) {
    obj.className = "";
    }
    }
    var addClass = function(obj, cls) {
    if (obj.className != cls) {
    obj.className = cls;
    }
    }

        let pos = document.documentElement.scrollTop;
        if (pos &gt; 300) {
          _this.isVisibleNav = true;
        } else {
          _this.isVisibleNav = false;
        }
        // 获取全部导航dom与元素dom
        var navList = document.querySelector("#js-nav").querySelectorAll("li");
        var items = document.querySelector("#js-content").querySelectorAll(".item");
        // 滚动后遍历元素,如果页面滚动位置大于元素的位置,赋值给变量
        var currentId = "";
        for (var i = 0; i &lt; items.length; i++) {
          var _item = items[i];
          var _itemTop = _item.offsetTop;
          if (pos &gt; _itemTop - 200) {
            currentId = _item.id;
          } else {
            break;
          }
        }
        // 如果已赋值了变量,进行匹配,如果匹配则添加class其他删除
        if (currentId) {
          for (var j = 0; j &lt; navList.length; j++) {
            var _navItem = navList[j];
            var _navId = _navItem.getAttribute('<a href="https://www.zybuluo.com/EncyKe/note/257932#js%E5%AF%BC%E8%88%AA%E6%9D%A1%E5%8D%95%E9%A1%B5%E9%9D%A2%E6%BB%9A%E5%8A%A8%E7%9B%91%E8%A7%86" rel="nofollow noreferrer">参考的文章地址</a></p>
    

    原文地址:https://segmentfault.com/a/1190000016798454

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  • 原文地址:https://www.cnblogs.com/lalalagq/p/9900966.html
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