Element​.scroll​Into​View()

让当前的元素滚动到浏览器窗口的可视区域内
element.scrollIntoView(); // 等同于element.scrollIntoView(true)
element.scrollIntoView(alignToTop); // Boolean型参数
/* alignToTop： 一个Boolean值：
如果为true，元素的顶端将和其所在滚动区的可视区域的顶端对齐。
相应的 scrollIntoViewOptions: {block: "start", inline: "nearest"}。
这是这个参数的默认值。

如果为false，元素的底端将和其所在滚动区的可视区域的底端对齐。
相应的scrollIntoViewOptions: {block: "end", inline: "nearest"}。
*/

Document​.element​From​Point(x, y)

返回当前文档上处于指定坐标位置最顶层的元素，坐标是相对于包含该文档的浏览器窗口的左上角为原点来计算的，通常 x 和 y 坐标都应为正数.

demo

<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <style>
    html,
    body {
      margin: 0;
      padding: 0;
      width: 100%;
      height: 100%;
    }

    ul,
    li {
      margin: 0;
      padding: 0;
      list-style-type: none;
    }

    .list-content {
      width: 100%;
      position: relative;
      font-size: 14px;
    }

    .sublist-alphabet {
      position: fixed;
      width: 14px;
      right: 14px;
      top: 28px;
    }

    .sublist-alphabet li {
      width: 14px;
      height: 14px;
      line-height: 14px;
      text-align: center;
      border-radius: 50%;
      margin: 5px 0;
    }

    .main-content li {
      width: 100%;
      margin: 10px;
      font-size: 16px;
    }
    .main-content li div {
      width: 100%;
      height: 20px;
      line-height: 20px;
    }
    .main-content li div ~ div {
      border-top: 1px solid red;
    }

    .sublist-alphabet .active {
      color: rgb(235, 17, 119);
      background-color: #ccc;
    }

    .main-content .active {
      background-color: aqua;
    }
  </style>
</head>

<body>
  <div class="list-content">
    <!-- 字母表 -->
    <ul class="sublist-alphabet">
      <li>a</li>
      <li>b</li>
      <li>c</li>
      <li>d</li>
      <li>e</li>
      <li>f</li>
      <li>g</li>
    </ul>
    <!-- 内容列表 -->
    <ul class="main-content">
      <li>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
        <div>aaaaaaaaaaaaaaaaa1</div>
        <div>aaaaaaaaaaaaaaaaa2</div>
        <div>aaaaaaaaaaaaaaaaa3</div>
      </li>
      <li data-type="b">
        <div>bbbbbbbbbbbbbbbbb1</div>
        <div>bbbbbbbbbbbbbbbbb2</div>
        <div>bbbbbbbbbbbbbbbbb3</div>
        <div>bbbbbbbbbbbbbbbbb1</div>
        <div>bbbbbbbbbbbbbbbbb2</div>
        <div>bbbbbbbbbbbbbbbbb3</div>
        <div>bbbbbbbbbbbbbbbbb1</div>
        <div>bbbbbbbbbbbbbbbbb2</div>
        <div>bbbbbbbbbbbbbbbbb3</div>
        <div>bbbbbbbbbbbbbbbbb1</div>
        <div>bbbbbbbbbbbbbbbbb2</div>
        <div>bbbbbbbbbbbbbbbbb3</div>
        <div>bbbbbbbbbbbbbbbbb1</div>
        <div>bbbbbbbbbbbbbbbbb2</div>
        <div>bbbbbbbbbbbbbbbbb3</div>
        <div>bbbbbbbbbbbbbbbbb1</div>
        <div>bbbbbbbbbbbbbbbbb2</div>
        <div>bbbbbbbbbbbbbbbbb3</div>
      </li>
      <li data-type="c">
        <div>ccccccccccccccccc1</div>
        <div>ccccccccccccccccc2</div>
        <div>ccccccccccccccccc3</div>
        <div>ccccccccccccccccc1</div>
        <div>ccccccccccccccccc2</div>
        <div>ccccccccccccccccc3</div>
        <div>ccccccccccccccccc1</div>
        <div>ccccccccccccccccc2</div>
        <div>ccccccccccccccccc3</div>
        <div>ccccccccccccccccc1</div>
        <div>ccccccccccccccccc2</div>
        <div>ccccccccccccccccc3</div>
        <div>ccccccccccccccccc1</div>
        <div>ccccccccccccccccc2</div>
        <div>ccccccccccccccccc3</div>
        <div>ccccccccccccccccc1</div>
        <div>ccccccccccccccccc2</div>
        <div>ccccccccccccccccc3</div>
      </li>
      <li data-type="d">
        <div>ddddddddddddddddd1</div>
        <div>ddddddddddddddddd2</div>
        <div>ddddddddddddddddd3</div>
        <div>ddddddddddddddddd1</div>
        <div>ddddddddddddddddd2</div>
        <div>ddddddddddddddddd3</div>
        <div>ddddddddddddddddd1</div>
        <div>ddddddddddddddddd2</div>
        <div>ddddddddddddddddd3</div>
        <div>ddddddddddddddddd1</div>
        <div>ddddddddddddddddd2</div>
        <div>ddddddddddddddddd3</div>
        <div>ddddddddddddddddd1</div>
        <div>ddddddddddddddddd2</div>
        <div>ddddddddddddddddd3</div>
        <div>ddddddddddddddddd1</div>
        <div>ddddddddddddddddd2</div>
        <div>ddddddddddddddddd3</div>
      </li>
      <li data-type="e">
        <div>eeeeeeeeeeeeeeeee1</div>
        <div>eeeeeeeeeeeeeeeee2</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee1</div>
        <div>eeeeeeeeeeeeeeeee2</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
        <div>eeeeeeeeeeeeeeeee3</div>
      </li>
      <li data-type="f">
        <div>fffffffffffffffff1</div>
        <div>fffffffffffffffff2</div>
        <div>fffffffffffffffff3</div>
        <div>fffffffffffffffff3</div>
        <div>fffffffffffffffff3</div>
        <div>fffffffffffffffff3</div>
        <div>fffffffffffffffff3</div>
        <div>fffffffffffffffff3</div>
        <div>fffffffffffffffff3</div>
        <div>fffffffffffffffff3</div>
      </li>
      <li data-type="g">
        <div>ggggggggggggggggg1</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg2</div>
        <div>ggggggggggggggggg3</div>
      </li>
    </ul>
  </div>
  <script>
    let list = document.querySelectorAll('.sublist-alphabet li')
    let contentList = document.querySelectorAll('.main-content li')
    list.forEach((item, index) => {
      list[index].onclick = () => {
        const lastIndex = sessionStorage.getItem('lastIndex') || ''
        if(lastIndex) {
          contentList[lastIndex].classList.remove('active')
          list[lastIndex].classList.remove('active')
        }
        contentList[index].scrollIntoView(true)
        contentList[index].classList.add('active')
        list[index].classList.add('active')
        sessionStorage.setItem('lastIndex', index)
      }
    })
  </script>
</body>

</html>

Element.scrollIntoView() 和 document.elementFromPoint ()的更多相关文章

  1. Element.scrollIntoView()

    Element.scrollIntoView() 方法让当前的元素滚动到浏览器窗口的可视区域内 语法 element.scrollIntoView(); element.scrollIntoView( ...

  2. js的Element.scrollIntoView的学习

    1.Element.scrollIntoView()    该方法让当前元素滚动到浏览器窗口的可是区域内: 2.语法: element.scrollIntoView();//等同于element.sc ...

  3. document.elementFromPoint在IE8下无法稳定获取当前坐标元素的解决方法

    document.elementFromPoint(e.clientX, e.clientY) document.elementFromPoint(e.clientX, e.clientY) 执行2次 ...

  4. 元素在当前窗口可视的区域---Element.scrollIntoView()

    element.scrollIntoView(); // 等同于element.scrollIntoView(true) element.scrollIntoView(alignToTop); // ...

  5. cvc-elt.1: Cannot find the declaration of element 'beans'Failed to read schema document 'http://www.springframework.org/schema/beans/spring- beans-3.0.xsd'

    Multiple annotations found at this line: - cvc-elt.1: Cannot find the declaration of element 'beans' ...

  6. javascript高级程序设计---document节点

    document节点是文档的根节点,每张网页都有自己的document节点,window.document就是指向这个节点.只要浏览器开始载入文档,这个节点就开始了 对于HTML文档来说,docume ...

  7. (88)Wangdao.com第二十一天_JavaScript 元素节点Element 节点

    Element 节点 (元素节点) 是一组对象 对应网页的 HTML 元素 每一个 HTML 元素,在 DOM 树上都会转化成一个 Element 节点对象(以下简称元素节点) 所有元素节点的 nod ...

  8. (87)Wangdao.com第二十天_JavaScript document 节点对象

    document 节点对象, 代表整个文档,每张网页都有自己的 document 对象. window.document 当浏览器开始加载文档时就存在了 正常的网页使用 document 或者 win ...

  9. scrollIntoView()的用法

    scrollIntoView是一个与页面(容器)滚动相关的API(官方解释),该API只有boolean类型的参数能得到良好的支持(firefox 36+都支持),所以在这里只讨论参数Boolean类 ...

随机推荐

  1. [DllImport("kernel32.dll")]

    这叫引入kernel32.dll这个动态连接库. 这个动态连接库里面包含了很多WindowsAPI函数,如果你想使用这面的函数,就需要这么引入.举个例子: [DllImport("kerne ...

  2. Samjia 和矩阵[loj6173](Hash+后缀数组)

    传送门 本题要求本质不同的子矩阵,即位置不同也算相同(具体理解可以看样例自己yy). 我们先看自己会什么,我们会求一个字符串中不同的子串的个数.我们考虑把子矩阵变成一个字符串. 先枚举矩阵的宽度,记为 ...

  3. swoole之建立 http server

    一.代码部分 <?php /** * 传统:nginx <-> php-fpm(fast-cgi process manager) <-> php * swoole:ht ...

  4. 在GNOME开发人员的努力下，Pango 1.44即将问世

    早在5月份,Red Hat的Matthias Clasen共同制定了计划,在近年来相当陈旧的情况下,对Pango布局引擎库进行了一些改进. 这项工作将随着Pango1.44版本的发布而实现,看起来它很 ...

  5. 【pwnable.tw】 death_note

    题目逻辑比较简单,大概增加和删除和打印三个功能: show函数中,打印各日记内容,由于这题没有给出libc文件,应该不需要泄露地址,估计用处不大: delete函数中,正常的free,然后指针修改为n ...

  6. PHPstudy2018 后门简单使用

    首先声明,仅为记录使用. 测试用例php-5.4.45 + Apache index.php 使用Firefox 浏览器,可以编辑并且重发http请求 打印出“net user” base64 加密后 ...

  7. RAM和ROM的区别

    区别如下: 1.概念 RAM(random access memory)即随机存储内存,这种存储器在断电时将丢失其存储内容,故主要用于存储短时间使用的程序.ROM(Read-Only Memory)即 ...

  8. 强大的promise

    这个玩意叫做普罗米修斯,希腊神话的盗火英雄 promise只用来包装异步函数,同步的会搞乱执行顺序,生产BUG // 如何使用 function pro(){ return new Promise(f ...

  9. docker安装centos7镜像

    拉取centos7镜像[root@localhost ~]# docker pull centos:71启动镜像centos7,如果不指定 /bin/bash,容器运行后会自动停止[root@loca ...

  10. JavaScript的调用

    1 方法调用模式 var myObject = { value : 0, increment : function(inc) { alert('hi'); } }; myObject.incremen ...