This article mainly introduces examples of js implementing drag and drop effects, which has a good reference value. Let’s take a look at it with the editor Rendering: (The red square can be dragged arbitrarily ) The code is as follows: Document *{ margin:0; padding:0; } body{ background:url("img/2345_image_file_copy_1.jpg"); } #d1{ width:100px; height:100px; background:red; margin-left:300px; } window.onload=function(){ var d1=document.getElementById("d1"); d1.onmousedown=function(e){ var mouseX=e.clientX; var mouseY=e.clientY;//计算xy var pianyiX=mouseX-d1.offsetLeft; var pianyiY=mouseY-d1.offsetTop; document.onmousemove=function(e){ var newX=e.clientX-pianyiX; var newY=e.clientY-pianyiY; d1.style.marginLeft=newX+"px"; d1.style.marginTop=newY+"px"; } }; document.onmouseup = function(e){ document.onmousemove = null ; }; } /* 结果，上面的onmousemove要写在document上,我写在p上导致错误 */
