js实现鼠标的拖曳效果,文中示例代码介绍的非常详细,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
效果如下:
下面是代码:
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<!DOCTYPE html> < html lang = "en" > < head > < meta charset = "UTF-8" > < meta name = "viewport" content = "width=device-width, initial-scale=1.0" > < title >鼠标拖曳效果</ title > < style > body{ background:black; } #box{ position:absolute; background: rgb(148, 143, 143); width: 400px; height: 200px; box-sizing: border-box; border: white 2px solid; } .topTitle{ cursor: move; border-bottom: white 2px solid; background: #cccccc; text-align: right; color: white; height: 20px; line-height: 20px; } .content >div{ background: rgb(148, 143, 143); height: 50px; line-height: 50px; color: white; text-align: left; } </ style > </ head > < body > < div id = "box" > < div class = "topTitle" >< a href = "#" >点击回放拖动轨迹</ a ></ div > < div class = "content" > < div >Drag:</ div > < div >offsetTop:</ div > < div >offsetLeft</ div > </ div > </ div > </ body > < script > var oBox=document.getElementById("box"); var oTopTitle=document.getElementsByClassName("topTitle")[0]; var aDiv= document.querySelectorAll(".content >div"); var offWidth=document.documentElement.clientWidth; var clHight=document.documentElement.clientHeight; var i,t; var state="false"; var oText=document.querySelector(".topTitle a"); oTopTitle.onmousedown=function(even){ var OffsetE=even||window.event; var flag=true; //设立边界: document.onmousemove=function(even){ state="true"; var ClientE=even||window.event; l=ClientE.clientX-OffsetE.offsetX; t=ClientE.clientY-OffsetE.offsetY; recorde(l,t,flag); if(l< 0 ){ l = 0 ; } if(t<0){ t = 0 ; } if(l>offWidth-oBox.offsetWidth){ l=offWidth-oBox.offsetWidth; } if(t>clHight-oBox.offsetHeight){ t=clHight-oBox.offsetHeight; } oBox.style.left=l+"px"; oBox.style.top=t+"px"; } document.onmouseup=function(){ console.log(1); state="false"; document.onmousemove=null; document.onmouseup=null; } OffsetE.preventDefault(); flag=false; } oText.onclick=function(){ var reback=recorde(l,t); var index=reback.strX.length; setInterval(function(){ if(index< 0 ){ clearInterval(); return; } oBox.style.left = reback .strX[index--] +"px"; oBox.style.top = reback .strY[index--]+"px"; },30); strX=[]; strY=[]; } var strX=[]; var strY=[]; function recorde(offsetTop,offsetLeft,flag){ var text1 = aDiv [1].innerText; aDiv[0] .innerHTML = "Drag:" +"<span style = 'color:yellow' >"+state+"</ span >"; aDiv[1].innerHTML="offsetTop:"+"< span style = 'color:yellow' >"+offsetTop+"</ span >"; aDiv[2].innerHTML="offsetLeft:"+"< span style = 'color:yellow' >"+offsetLeft+"</ span >"; strX.push(offsetTop) ; strY.push(offsetLeft); // console.log(strX); // console.log(strY); return { strX, strY } } </ script > </ html > |
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/weixin_42590083/article/details/111885913