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获取固定 div 容器内元素的绝对 position

[英]Getting absolute position of elements inside fixed div container

我有一个页面列表和一个容器以及每个页面的链接列表,我正在使用 jquery 的animate() function 使用页面的offset().top值移动到所需的页面,它第一次工作但在那之后,如果我点击另一个页面的链接,offset().top 位置就不一样了,它开始做奇怪的事情......

这是显示问题的代码片段

 <html> <head> <script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js" integrity="sha256-VazP97ZCwtekAsvgPBSUwPFKdrwD3unUfSGVYrahUqU=" crossorigin="anonymous"></script> </head> <body style="margin: 0px; padding: 0px; background-color: #AFAFAF;"> <div style="position: fixed; top: 0; left: 0; background-color: white; width: 100px; height: 120px; z-index: 99"> <a href="#" onclick="goToPage(1);">Go to page 1</a><br> <a href="#" onclick="goToPage(2);">Go to page 2</a><br> <a href="#" onclick="goToPage(3);">Go to page 3</a><br> <a href="#" onclick="goToPage(4);">Go to page 4</a><br> <a href="#" onclick="goToPage(5);">Go to page 5</a><br> <a href="#" onclick="goToPage(6);">Go to page 6</a> </div> <div id="divContainer"> <div id="fixedContainer" style="position: fixed; top: 0; left: 0; right: 0; bottom: 0;"> <div id="pageContainer" style="margin: 0 auto; height: 100%; max-width: 800px; position: relative; overflow-y: scroll; transition: all 0.3s ease-out 0s;"> <div id="page1" style="position: relative; height: 1200px; background-color: lightblue;"> </div> <div id="page2" style="position: relative; height: 1200px; background-color: lightcoral;"> </div> <div id="page3" style="position: relative; height: 1200px; background-color: lightcyan;"> </div> <div id="page4" style="position: relative; height: 1200px; background-color: lightgoldenrodyellow;"> </div> <div id="page5" style="position: relative; height: 1200px; background-color: lightgray;"> </div> <div id="page6" style="position: relative; height: 1200px; background-color: lightgreen;"> </div> </div> </div> </div> <script> function goToPage(elementId) { $('#pageContainer').animate({ scrollTop: $('#page' + elementId).offset().top }, 1200); } </script> </body> </html>

期望的结果将是在页面之间无缝移动,而不修改实际结构将是最好的。

您需要考虑position()而不是offset()并且您不应该即时执行此操作,而只能在页面加载时执行一次。

您可以尝试如下:

 $("#pageContainer > div").each(function() { $(this).attr("offset",$(this).position().top); }) function goToPage(elementId) { $('#pageContainer').animate({ scrollTop: $('#page' + elementId).attr('offset') }, 1200); }
 <html> <head> <script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script> <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js" integrity="sha256-VazP97ZCwtekAsvgPBSUwPFKdrwD3unUfSGVYrahUqU=" crossorigin="anonymous"></script> </head> <body style="margin: 0px; padding: 0px; background-color: #AFAFAF;"> <div style="position: fixed; top: 0; left: 0; background-color: white; width: 100px; height: 120px; z-index: 99"> <a href="#" onclick="goToPage(1);">Go to page 1</a><br> <a href="#" onclick="goToPage(2);">Go to page 2</a><br> <a href="#" onclick="goToPage(3);">Go to page 3</a><br> <a href="#" onclick="goToPage(4);">Go to page 4</a><br> <a href="#" onclick="goToPage(5);">Go to page 5</a><br> <a href="#" onclick="goToPage(6);">Go to page 6</a> </div> <div id="divContainer"> <div id="fixedContainer" style="position: fixed; top: 0; left: 0; right: 0; bottom: 0;"> <div id="pageContainer" style="margin: 0 auto; height: 100%; max-width: 800px; position: relative; overflow-y: scroll; transition: all 0.3s ease-out 0s;"> <div id="page1" style="position: relative; height: 1200px; background-color: lightblue;"> </div> <div id="page2" style="position: relative; height: 1200px; background-color: lightcoral;"> </div> <div id="page3" style="position: relative; height: 1200px; background-color: lightcyan;"> </div> <div id="page4" style="position: relative; height: 1200px; background-color: lightgoldenrodyellow;"> </div> <div id="page5" style="position: relative; height: 1200px; background-color: lightgray;"> </div> <div id="page6" style="position: relative; height: 1200px; background-color: lightgreen;"> </div> </div> </div> </div> <script> </script> </body> </html>

.position()方法允许我们检索元素(特别是其边距框)相对于偏移父级(特别是其填充框,不包括边距和边框)的当前 position。 将此与.offset()进行对比,后者检索相对于文档的当前 position。 当将新元素定位在另一个元素附近并在同一个包含 DOM 元素内时, .position()更有用。 参考

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