刷新页面并保持滚动位置

时间:2013-07-14 19:25:12

标签: javascript html

有人能告诉我我做错了什么吗?我需要在一段时间后刷新页面,但它刷新到页面顶部,我需要它不改变页面位置!所以这就是我现在没有工作的是meta标签吗?这是我还没有不刷新必须做错的事情?

这是我原来的......

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
    <head>
        <meta http-equiv="refresh" content="72">
        <meta http-equiv="Pragma" CONTENT="no-cache">
        <meta http-equiv="Expires" CONTENT="-1">

        <style type="text/css">
        body
        { 
            background-image: url('../Images/Black-BackGround.gif');
            background-repeat: repeat;
        }
        </style>
    </head>

    <script type="text/javascript">

    function saveScrollPositions(theForm) {
        if(theForm) {
            var scrolly = typeof window.pageYOffset != 'undefined' ? window.pageYOffset
                                                   : document.documentElement.scrollTop;
            var scrollx = typeof window.pageXOffset != 'undefined' ? window.pageXOffset
                                                  : document.documentElement.scrollLeft;
            theForm.scrollx.value = scrollx;
            theForm.scrolly.value = scrolly;
        }
    }
    </script>

 <form action="enroll.php" name="enrollment" method="post" onsubmit="return saveScrollPositions (this);">
  <input type="hidden" name="scrollx" id="scrollx" value="0" />
  <input type="hidden" name="scrolly" id="scrolly" value="0" />

  <STYLE type="text/css">
   #Nav a{ position:relative; display:block; text-decoration: none; color:Black; }
   Body td{font-Family: Arial; font-size: 12px; }
  </style>

在阅读了一些初步答案后,我将其更改为...

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>

<style type="text/css">
body
{ 
    background-image: url('../Images/Black-BackGround.gif');
    background-repeat: repeat;
}
</style>
</head>


<script>
function refreshPage () {
    var page_y = $( document ).scrollTop();
    window.location.href = window.location.href + '?page_y=' + page_y;
}
window.onload = function () {
    setTimeout(refreshPage, 35000);
    if ( window.location.href.indexOf('page_y') != -1 ) {
        var match = window.location.href.split('?')[1].split("&")[0].split("=");
        $('html, body').scrollTop( match[1] );
    }
}
</script>

<STYLE type="text/css">
#Nav a{ position:relative; display:block; text-decoration: none; color:black; }
Body td{font-Family: Arial; font-size: 12px; }
</style>

8 个答案:

答案 0 :(得分:29)

document.location.reload() 存储该位置,请参阅in the docs

添加额外的true参数以强制重新加载,但不会恢复位置。

document.location.reload(true)

MDN docs:

  

forcedReload标志会更改某些浏览器处理用户滚动位置的方式。通常reload()会在之后恢复滚动位置,但强制模式可以滚动回到页面顶部,就好像window.scrollY === 0。

答案 1 :(得分:11)

如果您不想使用本地存储,那么您可以将页面的y位置附加到URL并在加载时使用js抓取它并将页面偏移设置为您传入的get参数,即:

//code to refresh the page
var page_y = $( document ).scrollTop();
window.location.href = window.location.href + '?page_y=' + page_y;


//code to handle setting page offset on load
$(function() {
    if ( window.location.href.indexOf( 'page_y' ) != -1 ) {
        //gets the number from end of url
        var match = window.location.href.split('?')[1].match( /\d+$/ );
        var page_y = match[0];

        //sets the page offset 
        $( 'html, body' ).scrollTop( page_y );
    }
});

答案 2 :(得分:7)

这对于刷新也很有用。但是,如果您想在点击同一位置之前跟踪页面上的位置..以下代码将有所帮助。

还添加了一个数据确认,提示用户是否真的想要这样做..

注意:我使用jQuery和js-cookie.js存储Cookie信息。

$(document).ready(function() {
    // make all links with data-confirm prompt the user first.
    $('[data-confirm]').on("click", function (e) {
        e.preventDefault();
        var msg = $(this).data("confirm");
        if(confirm(msg)==true) {
            var url = this.href;
            if(url.length>0) window.location = url;
            return true;
        }
        return false;
    });

    // on certain links save the scroll postion.
    $('.saveScrollPostion').on("click", function (e) {
        e.preventDefault();
        var currentYOffset = window.pageYOffset;  // save current page postion.
        Cookies.set('jumpToScrollPostion', currentYOffset);
        if(!$(this).attr("data-confirm")) {  // if there is no data-confirm on this link then trigger the click. else we have issues.
            var url = this.href;
            window.location = url;
            //$(this).trigger('click');  // continue with click event.
        }
    });

    // check if we should jump to postion.
    if(Cookies.get('jumpToScrollPostion') !== "undefined") {
        var jumpTo = Cookies.get('jumpToScrollPostion');
        window.scrollTo(0, jumpTo);
        Cookies.remove('jumpToScrollPostion');  // and delete cookie so we don't jump again.
    }
});

像这样使用它的一个例子。

<a href='gotopage.html' class='saveScrollPostion' data-confirm='Are you sure?'>Goto what the heck</a>

答案 3 :(得分:3)

感谢Sanoj,为我工作了。
但是,iOS在iPhone上不支持“ onbeforeunload”。对我来说,解决方法是使用js设置localStorage:

<button onclick="myFunction()">Click me</button>

<script>
document.addEventListener("DOMContentLoaded", function(event) { 
            var scrollpos = localStorage.getItem('scrollpos');
            if (scrollpos) window.scrollTo(0, scrollpos);
        });
function myFunction() {
  localStorage.setItem('scrollpos', window.scrollY);
  location.reload(); 
}
</script>

答案 4 :(得分:2)

<强>更新

您可以使用下面提到的document.location.reload(true)代替下面的强制技巧。

用以下内容替换HTML:

<!DOCTYPE html>
<html>
    <head>
        <style type="text/css">
            body { 
                background-image: url('../Images/Black-BackGround.gif');
                background-repeat: repeat;
            }
            body td {
               font-Family: Arial; 
               font-size: 12px; 
            }
            #Nav a { 
                position:relative; 
                display:block; 
                text-decoration: none; 
                color:black; 
            }
        </style>
        <script type="text/javascript">
            function refreshPage () {
                var page_y = document.getElementsByTagName("body")[0].scrollTop;
                window.location.href = window.location.href.split('?')[0] + '?page_y=' + page_y;
            }
            window.onload = function () {
                setTimeout(refreshPage, 35000);
                if ( window.location.href.indexOf('page_y') != -1 ) {
                    var match = window.location.href.split('?')[1].split("&")[0].split("=");
                    document.getElementsByTagName("body")[0].scrollTop = match[1];
                }
            }
        </script>
    </head>
    <body><!-- BODY CONTENT HERE --></body>
</html>

答案 5 :(得分:2)

我修改了Sanoj Dushmantha的答案,使用sessionStorage而不是localStorage。但是,尽管有文档说明,即使关闭浏览器后,浏览器仍会存储此数据。要解决此问题,我将在重置滚动位置后将其移除。

<script>
    document.addEventListener("DOMContentLoaded", function (event) {
        var scrollpos = sessionStorage.getItem('scrollpos');
        if (scrollpos) {
            window.scrollTo(0, scrollpos);
            sessionStorage.removeItem('scrollpos');
        }
    });

    window.addEventListener("beforeunload", function (e) {
        sessionStorage.setItem('scrollpos', window.scrollY);
    });
</script>

答案 6 :(得分:0)

这会神奇

    <script>
        document.addEventListener("DOMContentLoaded", function(event) { 
            var scrollpos = localStorage.getItem('scrollpos');
            if (scrollpos) window.scrollTo(0, scrollpos);
        });

        window.onbeforeunload = function(e) {
            localStorage.setItem('scrollpos', window.scrollY);
        };
    </script>

答案 7 :(得分:0)

我找到了一个非常简单的解决方案。只需在链接 HREF 标签中添加一个 ID 链接作为单独的参数

<a class="page-link" href="{{ url_for('events.home', page=page_num) }}, #past_events">

链接到我想要保持焦点的 div 顶部。