錨點/JQ：點擊導航跳到網頁中的指定位置

時間 2019-11-08

原文原文鏈接

今天作了一個簡單的功能，頁面往下滾動到必定位置，頂部出現一個浮動的導航欄，點擊導航欄標籤，下面頁面跳轉到相應的區域。回到頂部，導航欄隱藏。javascript

由於頂部有一個浮動的導航欄，因此跳轉到下面頁面的時候，老是蓋住一部分，頂部浮動DIV的高度佔用。html

最簡單的解決辦法就是給錨點加上個下面的樣式：java

anchor{
    display: block;
    position: relative;
    top: -92px;
    visibility: hidden;
}

示例代碼以下：jquery

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
 *{margin: 0;padding: 0;} 
 a{color:#000000; text-decoration:none;}
 .banner{height: 2rem;border: 1px solid #ccc;}
.navTab{width:100%;height:1rem;line-height:1rem;font-size:.32rem;background:#fff;border-bottom:5px solid #EEEEEE;display: flex;flex-direction: row;white-space: nowrap;overflow-x: scroll;z-index: 99;}
.navTab li{margin-left: 0.3rem;display: inline-block;}
.navTab li.active a{padding-bottom:.1rem;color: #12318B;font-weight:bold;border-bottom: 1px solid #12318B;}
.fixnav {position: fixed;top: 0; bottom: 0;width: 100%;height:1rem;overflow-x: scroll;overflow-y: hidden;z-index: 99;}
.banner{width:7.5rem;height:3.75rem;}
.top_title{margin:0.3rem 0.25rem 0;font-size:0.38rem;}
.top_text{margin:0.1rem 0.25rem;font-size:0.26rem;line-height:.44rem;display: -webkit-box;-webkit-box-orient: vertical;
    -webkit-line-clamp: 4;overflow: hidden;}
.newslist{margin-top:.3rem;}
.col_title{color:#12318B;font-size:.34rem;font-weight:bold;}
.anchor{display: block;position: relative;top: -1rem;visibility: hidden;}
</style>
<title>專題列表</title>
</head>
<body>
<div class="banner"></div>
<div class="top_nav fixnav">
  <div class="navTab">
    <ul>
        <li class=""><a href="#0010bq008000000">開放日回</a></li>
        <li class=""><a href="#0010bq007000000">圖文直播</a></li>
        <li class=""><a href="#0010bq005000000">分析評論</a></li>
        <li class=""><a href="#0010bq004000000">媒體報道</a></li>
    </ul>
  </div>
</div> 
<div class="newslist" style="margin-top:1rem">
    <div id="0010bq008000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>開放日回</div>
    <div class="TnList" style="height:5rem;">11</div>
    <div id="0010bq007000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>圖文直播</div>
    <div class="TnList" style="height:5rem;">22</div>
    <div id="0010bq005000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>分析評論</div>
    <div class="TnList" style="height:5rem;">33</div>
    <div id="0010bq004000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>媒體報道</div>
    <div class="TnList" style="height:5rem;">44</div>
</div>   
<script src="js/rem.js"></script>
<script src='js/jquery1.10.2.min.js'></script>
<script src="template/build/template.js'></script>
<script >
$(document).ready(function() {
  $(".top_nav").hide();
    $(window).scroll(function() {
        if($(document).scrollTop() >= 200) {
      $(".top_nav").addClass("fixnav").slideDown();
        } else {
      $(".top_nav").hide();
        }
  })   
  
  $(".navTab li").click(function(){
    var index = $(this).index();  
    console.log('點擊了:'+$(this).index());  
    $(this).addClass('active').siblings().removeClass('active');
      
  })
});

</script>

</body>
</html>

也能夠js實現頁面滾動，代碼以下：web

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="description" content="">
<meta name="viewport" content="width=device-width, initial-scale=1">
<style>
 *{margin: 0;padding: 0;} 
 a{color:#000000; text-decoration:none;}
 .banner{height: 2rem;border: 1px solid #ccc;}
.navTab{width:100%;height:1rem;line-height:1rem;font-size:.32rem;background:#fff;border-bottom:5px solid #EEEEEE;display: flex;flex-direction: row;white-space: nowrap;overflow-x: scroll;z-index: 99;}
.navTab li{margin-left: 0.3rem;display: inline-block;}
.navTab li.active a{padding-bottom:.1rem;color: #12318B;font-weight:bold;border-bottom: 1px solid #12318B;}
.fixnav {position: fixed;top: 0; bottom: 0;width: 100%;height:1rem;overflow-x: scroll;overflow-y: hidden;z-index: 99;}
.banner{width:7.5rem;height:3.75rem;}
.top_title{margin:0.3rem 0.25rem 0;font-size:0.38rem;}
.top_text{margin:0.1rem 0.25rem;font-size:0.26rem;line-height:.44rem;display: -webkit-box;-webkit-box-orient: vertical;
    -webkit-line-clamp: 4;overflow: hidden;}
.newslist{margin-top:.3rem;}
.col_title{color:#12318B;font-size:.34rem;font-weight:bold;}
.anchor{display: block;position: relative;top: -1rem;visibility: hidden;}
.TnList{height:5rem;}
</style>
<title>專題列表</title>
</head>
<body>
<div class="banner"></div>
<div class="top_nav fixnav">
  <div class="navTab" id="listColumn">
    <ul>
        <li class="" ><a >開放日回</a></li>
        <li class="" ><a >圖文直播</a></li>
        <li class="" ><a >分析評論</a></li>
        <li class="" ><a >媒體報道</a></li>
    </ul>
  </div>
</div> 
<div class="newslist" id="newsList" style="margin-top:1rem">
    <!-- <div id="0010bq008000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>開放日回</div>
    <div class="TnList" style="height:5rem;">11</div>
    <div id="0010bq007000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>圖文直播</div>
    <div class="TnList" style="height:5rem;">22</div>
    <div id="0010bq005000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>分析評論</div>
    <div class="TnList" style="height:5rem;">33</div>
    <div id="0010bq004000000" class="anchor"></div>
    <div class="col_title flex-row"><label class="title_Vline"></label>媒體報道</div>
    <div class="TnList" style="height:5rem;">44</div> -->
</div>   
<script src="js/rem.js"></script>
<script src='js/jquery1.10.2.min.js'></script>
<script src="template/build/template.js" type="text/javascript" charset="utf-8"></script>
<script src="js/untils.js" type="text/javascript"></script>
<script src="js/md5.js" type="text/javascript"></script>
<script >
$(document).ready(function() {
  var data = {
      column:[
        {'subjectId':'0010bq008000000', 'subjectTitle':'開放日回'},{'subjectId':'0010bq007000000', 'subjectTitle':'圖文直播'},
        {'subjectId':'0010bq005000000', 'subjectTitle':'分析評論'},{'subjectId':'0010bq004000000', 'subjectTitle':'媒體報道'},
      ],
      nlist:[
        {'subjectId':'0010bq008000000', 'subjectTitle':'開放日回', articleData:[{'titleLong':'第一條'},{'titleLong':'第二條'},{'titleLong':'第三條'}]},
        {'subjectId':'0010bq007000000', 'subjectTitle':'圖文直播', articleData:[{'titleLong':'第一條'},{'titleLong':'第二條'},{'titleLong':'第三條'}]},
        {'subjectId':'0010bq005000000', 'subjectTitle':'分析評論', articleData:[{'titleLong':'第一條'},{'titleLong':'第二條'},{'titleLong':'第三條'}]},
        {'subjectId':'0010bq004000000', 'subjectTitle':'媒體報道', articleData:[{'titleLong':'第一條'},{'titleLong':'第二條'},{'titleLong':'第三條'}]},
      ],
  };

  $(".top_nav").hide();
    $(window).scroll(function() {
        if($(document).scrollTop() >= 200) {
      $(".top_nav").addClass("fixnav").slideDown();
        } else {
      $(".top_nav").hide();
        }
  })   
  
 //Render('listColumn2', data, 'listColumn');
  Render('list', data, 'newsList');

  $(".navTab").on("click","li",function(){ 
    $(this).addClass('active').siblings().removeClass('active');

    var navIndex = $(this).index();
    console.log(navIndex);
    console.log(data.nlist[navIndex].subjectId);
    var menuTypeId = "div[data-id" + data.nlist[navIndex].subjectId + "]";
    console.log('.newslist ' + menuTypeId);
    $("html, body").animate({
      scrollTop: $('.newslist ' + menuTypeId).offset().top}, {duration: 100,easing: "swing"
    });//scrollTop:指定相關模塊回到指定位置（該位置要去掉菜單導航欄高度）。

  });

});

</script>

</body>
</html>

注意同樣名字的id只能有一個ide

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