JavaScript限制在客户区可见范围的拖拽(解决scrollLeft和scrollTop的问题)（2）

<Meta charset="utf-8"> 客户区可见范围限制拖拽@H_<a href="https://www.jb51.cc/tag/301/" target="_blank" class="keywords">301</a>_12@ <style type="text/css"> * { padding: 0; margin: 0; } #div1 { width: 100px; height: 100px; background: orange; position: absolute; } </style> </head> <body style="width: 200000px;height: 200000px;"> <div id="div1"></div> <p><script type="text/javascript"><br /> var oDiv = document.getElementById('div1');<br /> function getStyle(obj,attr) {<br /> if (obj.currentStyle) {<br /> return obj.currentStyle[attr];<br /> } else {<br /> return getComputedStyle(obj,null)[attr];<br /> }<br /> }</p> <pre><code>//getPos得到的是鼠标当前位置距离<a href="https://www.jb51.cc/tag/yemian/" target="_blank" class="keywords">页面</a>最左/上边的距离,<a href="https://www.jb51.cc/tag/baokuo/" target="_blank" class="keywords">包括</a>被卷走的部分 function getPos(ev) { var scrollTop = document.documentElement.scrollTop || document.body.scrollTop; var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft; return { x : scrollLeft + ev.clientX,y : scrollTop + ev.clientY }; } function getScrollPos() { var scrollTop = document.documentElement.scrollTop || document.body.scrollTop; var scrollLeft = document.documentElement.scrollLeft || document.body.scrollLeft; return { x : scrollLeft,y : scrollTop }; } oDiv.onmousedown = function(ev) { var oEvent = ev || event; var pos = getPos(oEvent); var disX = pos.x - parseInt(getStyle(oDiv,'left')); var disY = pos.y - parseInt(getStyle(oDiv,'top')); document.onmousemove = function(ev) { var oEvent = ev || event; var l = oEvent.clientX - disX; var t = oEvent.clientY - disY; if (l < 0) { l = 0; } else if (l > document.documentElement.clientWidth - oDiv.offsetWidth) { l = document.documentElement.clientWidth - oDiv.offsetWidth; } if (t < 0) { t = 0; } else if (t > document.documentElement.clientHeight - oDiv.offsetHeight) { t = document.documentElement.clientHeight - oDiv.offsetHeight; } l = l + getScrollPos().x;//最后left是相对于body的，<a href="https://www.jb51.cc/tag/jiashang/" target="_blank" class="keywords">加上</a>卷走的部分scrollLeft； t = t + getScrollPos().y;//<a href="https://www.jb51.cc/tag/jiashang/" target="_blank" class="keywords">加上</a>卷走的高度scrollTop // oDiv.style.left = l + 'px'; // oDiv.style.top = t + 'px'; oDiv.style.cssText = ';left:' + l + 'px;top:' + t + 'px;'; }; document.onmouseup = function() { document.onmousemove = null; document.onmouseup = null; }; };</code></pre> </script> </body> </html> </pre> </div> <p>以上就是本文的全部<a href="https://www.jb51.cc/tag/neirong/" target="_blank" class="keywords">内容</a>，希望对大家的学习有所帮助，也希望大家多多<a href="https://www.jb51.cc/tag/zhichi/" target="_blank" class="keywords">支持</a>编程之家。</p><i class="glyphicon glyphicon-link"></i> 原文链接：https://www.f2er.com/js/39233.html</div> <div class="topcard-tags"><a href="https://www.f2er.com/tag/jsp/" class="tag_link" target="_blank">js</a><a href="https://www.f2er.com/tag/scrollLeft/" class="tag_link" target="_blank">scrollLeft</a><a href="https://www.f2er.com/tag/scrollTop/" class="tag_link" target="_blank">scrollTop</a><a href="https://www.f2er.com/tag/tuoye/" class="tag_link" target="_blank">拖拽</a></div> <ul class="list-group"> <li class="list-group-item"><a href="https://www.f2er.com/js/39235.html" title="Angular.JS中的this指向详解">上一篇：Angular.JS中的this指向详解</a><a href="https://www.f2er.com/js/39231.html" title="JavaScript运动框架解决速度正负取整问题（一）" class="text-muted pull-right">下一篇：JavaScript运动框架解决速度正负取</a> </li> </ul> </div> </div> </div>  <div class="row row-sm"> <div class="col-sm-12 col-md-12 col-lg-12"> <div class="card"> <ins class="adsbygoogle" style="display:block" data-ad-format="autorelaxed" data-ad-client="ca-pub-4605373693034661" data-ad-slot="9144498553"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); 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