1、前端页面应用滑块验证可以防止页面频繁向后台请求数据；
2、主要用到js事件：
onmousedown()：鼠标按下时响应
onmousemove()：鼠标移动时响应
onmouseup() ： 鼠标弹起时响应
3、获取页面距离的语句：
e.clientxobj.offsetwidthobj.offsetleft
4、代码：
html:
<p class="box"> <p class="txt">滑块验证</p> <p class="btn">>></p> <p class="bg"></p></p>
css:
*{ -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; } .box{ position: relative; width:300px; height:30px; background-color: #ccc; margin:20px auto; font-size:14px; line-height:30px; box-sizing:border-box; z-index:1; } .txt{ position: absolute; left: 50%; top:0; transform: translatex(-50%); color:blue; z-index:3; } .btn{ position: absolute; top:0; left: 0; width:40px; height:30px; border:1px solid #ccc; background-color: #fff; text-align: center; line-height: 30px; cursor: move; box-sizing: border-box; z-index:4; } .bg{ position: absolute; left: 0; top:0; width:0; height:30px; background-color:green; box-sizing: border-box; z-index:2; }
js:
window.onload = function(){ var box = document.queryselector(".box"), txt = document.queryselector(".txt"), btn = document.queryselector(".btn"), bg = document.queryselector(".bg"), end = false; btn.onmousedown = function(e){ var e = e || window.event; var point = e.clientx - box.offsetleft; btn.onmousemove = function(e){ var movew = e.clientx - box.offsetleft - point; btn.style.left = movew + "px"; bg.style.width = movew + "px"; if(btn.offsetleft<=0){ btn.style.left = "0"; } if(btn.offsetleft>=(box.clientwidth - btn.clientwidth)){ btn.style.left = box.clientwidth - btn.clientwidth txt.innerhtml = "验证完成"; btn.onmousemove = null; btn.onmousedown = null; end = true; } } btn.onmouseup = function(){ btn.onmousemove = null; if(!end){ btn.style.left = "0"; bg.style.width = "0"; } } } }
总结：以上就是本篇文的全部内容，代码很简单，大家可以动手试试。希望能对大家的学习有所帮助，更多相关教程请访问javascript视频教程，jquery视频教程，bootstrap教程！
以上就是javascript实现前端滑块验证效果（代码实例）的详细内容。