沒有移動元素從相對位置變為固定位置
[英]Change from relative to fixed position without moving element
問題描述
我希望“提升”一個先前相對定位的<div>這樣我就可以完全控制它的位置。 使用引導網格定位div。
為此，我想將樣式從“相對”更改為“固定”，但沒有（最初）移動<div> 。
我試圖找到獲得相對元素的絕對左邊屬性的方法，允許我在更改到固定位置時簡單地設置它，但似乎沒有？ 做一個正確的方法（感覺有點hacky）。
2 個解決方案
解決方案1
2 已采納 2015-04-07 11:48:27
使用Element.getBoundingClientRect（）獲取元素相對於視口的坐標。
在此代碼段中，單擊列表項以將其凍結到位：
document.addEventListener('click', function(e) { var el= e.target; if(el.tagName==='SPAN') { var br= el.getBoundingClientRect(); el.style.position= 'fixed'; el.style.left= br.left+'px'; el.style.top = br.top +'px'; } });
body {font: 40px verdana;} span {position: relative; color: white; cursor: pointer} #A {background: #036;} #B {background: #630;} #C {background: #063;} #D {background: #603;} #E {background: #360;}
<ul> <li><span id="A">Alpha </span> <li><span id="B">Bravo </span> <li><span id="C">Charlie</span> <li><span id="D">Delta </span> <li><span id="E">Echo </span> </ul> <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p> <p>Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem. Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?</p>
解決方案2
1 2015-04-07 11:39:40
以下是您在評論中提出的代碼示例：
我首先得到了元素的offset頂部和左側位置。
然后使用.css() Jquery API進行設置。
$(function() { var $tobechanged = $("#tobechanged").offset(); $("#tobechanged").css({ top : $tobechanged.top+"px", left: $tobechanged.left+"px", position: "fixed" }); });
body { height: 30000px; } #relative { background: red; height: 50px; width: 100%; } #tobechanged { height: 100px; background: green; width: 100%; position: relative; }
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script> <body> <div id="relative"> </div> <div id="tobechanged"> </div>
使用純JS：
window.onload = function() { var $tobechanged = document.querySelector("#tobechanged"), $tobechangedOffset = $tobechanged.getBoundingClientRect(); $tobechanged.style.top = $tobechangedOffset.top+"px"; $tobechanged.style.left = $tobechangedOffset.left+"px"; $tobechanged.style.position = "fixed"; };
body { height: 30000px; } #relative { background: red; height: 50px; width: 100%; } #tobechanged { height: 100px; background: green; width: 100%; position: relative; }
<body> <div id="relative"> </div> <div id="tobechanged"> </div>
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