Detailed explanation of scrollIntoView usage in h5-H5 Tutorial-php.cn

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Detailed explanation of scrollIntoView usage in h5

零下一度

Jun 25, 2017 am 10:03 AM

html5 ie element control scroll page

If the page is scrolled, it is also a problem that DOM has not solved. In order to solve this problem, browsers have implemented a method to facilitate developers to better control the scrolling of the page. Among various proprietary methods, HTML5 chose scrollIntoView() as the standard method. scrollIntoView() can be called on all HTML elements. By scrolling the browser window or a container element, the calling element can appear in the window. If true is passed as a parameter to this method, or no parameters are passed in, then the top of the adjusted element and the top of the window will be as flush as possible after the window is scrolled. If false is passed in as a parameter, the calling element will appear as fully as possible in the viewport (if possible, the bottom of the calling element will be flush with the top of the viewport.) However, the top is not necessarily flush.

1. scrollIntoView

html

<div><h2>scrollIntoView</h2><button id="roll1">scrollIntoView(false)</button><button id="roll2">scrollIntoView(true)</button><div><div id="myDiv"></div><div id="roll_top">scrollIntoView(ture)元素上边框与视窗顶部齐平<span id="bottom">scrollIntoView(false)元素下边框与视窗底部齐平</span></div></div></div>

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css

       #myDiv {height: 900px;background-color: gray;

        }#roll_top {height: 900px;background-color: green;color: #FFF;font-size: 50px;position: relative;
        }#bottom {position: absolute;display: block;left: 0;bottom: 0;
        }

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js

  window.onload = function () {
        document.querySelector("#roll1").onclick = function () {
            document.querySelector("#roll_top").scrollIntoView(false);
        };
        document.querySelector("#roll2").onclick = function () {
            document.querySelector("#roll_top").scrollIntoView(true);
        };
    }

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2. Scroll monitoring

html

<div><h2>scroll</h2><div id="nav"><div class="f1">floor1</div><div class="f2">floor2</div><div class="f3">floor3</div><div class="f4">floor4</div><div class="f5">floor5</div></div><p>页面结构</p><div class="main"><div id="f1">测试1</div><div id="f2">测试2</div><div id="f3">测试3</div><div id="f4">测试4</div><div id="f5">测试5</div></div></div>

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css

      .main div {height: 1000px;width: 300px;margin: 20px;background-color: #C0C0C0;
        }#nav {position: fixed;width: 100px;height: 200px;top: 40%;right: 10px;
        }#nav div {cursor: pointer;text-align: center;

        }

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js

    $(function () {
        $(window).scroll(function () {//为页面添加页面滚动监听事件var wst = $(window).scrollTop(); //滚动条距离顶端值for (var i = 1; i < 6; i++) {             //加循环if ($("#f" + i).offset().top <= wst + 10) { //判断滚动条位置$(&#39;#nav div&#39;).css("background-color", "white");
                    $(".f" + i).css("background-color", "red");
                }
            }
        });
        $(&#39;#nav div&#39;).click(function () {
            $(&#39;html,body&#39;).animate({scrollTop: $("#" + this.className).offset().top}, 500);//          $("#" + this.className)[0].scrollIntoView(true);//h5 scrollIntoView()});
    });

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All Code

h5之scrollIntoView控制页面元素滚动<div><h2>scrollIntoView</h2><button id="roll1">scrollIntoView(false)</button><button id="roll2">scrollIntoView(true)</button><div><div id="myDiv"></div><div id="roll_top">scrollIntoView(ture)元素上边框与视窗顶部齐平<span id="bottom">scrollIntoView(false)元素下边框与视窗底部齐平</span></div></div></div><div><h2>scroll</h2><div id="nav"><div class="f1">floor1</div><div class="f2">floor2</div><div class="f3">floor3</div><div class="f4">floor4</div><div class="f5">floor5</div></div><p>页面结构</p><div class="main"><div id="f1">测试1</div><div id="f2">测试2</div><div id="f3">测试3</div><div id="f4">测试4</div><div id="f5">测试5</div></div></div><script>window.onload = function () {/* 如果滚动页面也是DOM没有解决的一个问题。为了解决这个问题，浏览器实现了一下方法，以方便开发人员如何更好的控制页面的滚动。
         在各种专有方法中，HTML5选择了scrollIntoView()作为标准方法。scrollIntoView()可以在所有的HTML元素上调用，
         通过滚动浏览器窗口或某个容器元素，调用元素就可以出现在视窗中。如果给该方法传入true作为参数，或者不传入任何参数，
         那么窗口滚动之后会让调动元素顶部和视窗顶部尽可能齐平。如果传入false作为参数，调用元素会尽可能全部出现在视口中（可能的话，调用元素的底部会与视口的顶部齐平。）不过顶部不一定齐平.         */document.querySelector("#roll1").onclick = function () {
            document.querySelector("#roll_top").scrollIntoView(false);
        };
        document.querySelector("#roll2").onclick = function () {
            document.querySelector("#roll_top").scrollIntoView(true);
        };
    }</script><script>$(function () {
        $(window).scroll(function () {//为页面添加页面滚动监听事件var wst = $(window).scrollTop(); //滚动条距离顶端值for (var i = 1; i < 6; i++) {             //加循环if ($("#f" + i).offset().top <= wst + 10) { //判断滚动条位置                    $('#nav div').css("background-color", "white");
                    $(".f" + i).css("background-color", "red");
                }
            }
        });
        $('#nav div').click(function () {
            $('html,body').animate({scrollTop: $("#" + this.className).offset().top}, 500);//          $("#" + this.className)[0].scrollIntoView(true);//h5 scrollIntoView()});
    });</script>

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