滑动验证，HTML代码在线实时编辑、实时预览

index.html

style.css

index.js

index.html

            
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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">
  <link rel="stylesheet" href="./style.css">
  <script src="./index.js"></script>
</head>

<body>
   <div id="dragContainer">
            <!-- 容器初始背景 -->
            <div id="dragBg"></div>
            <!-- 绿色背景 -->
            <div id="dragText"></div>
            <!-- 滑动容器文本 -->
            <div id="dragHandler" class="dragHandlerBg"></div>
       </div>
</body>

</html>

编辑器加载中

style.css

            
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            /* 滑动控件容器,灰色背景 */
        
        #dragContainer {
            position: relative;
            display: inline-block;
            background: #e8e8e8;
            width: 300px;
            height: 33px;
            border: 2px solid #e8e8e8;
        }
        /* 滑块左边部分,绿色背景 */
        
        #dragBg {
            position: absolute;
            background-color: #7ac23c;
            width: 0px;
            height: 100%;
        }
        /* 滑动验证容器文本 */
        
        #dragText {
            position: absolute;
            width: 100%;
            height: 100%;
            /* 文字水平居中 */
            text-align: center;
            /* 文字垂直居中,这里不能用百分比,因为百分比是相对原始line-height的,而非div高度 */
            line-height: 33px;
            /* 文本不允许选中 */
            user-select: none;
            -webkit-user-select: none;
        }
        /* 滑块 */
        
        #dragHandler {
            position: absolute;
            width: 40px;
            height: 100%;
            cursor: move;
        }
        /* 滑块初始背景 */
        
        .dragHandlerBg {
            background: #fff no-repeat center url("data:image/png;base64,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");
        }
        /* 验证成功时的滑块背景 有√*/
        
        .dragHandlerOkBg {
            background: #fff no-repeat center url("data:image/png;base64,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");
        }

编辑器加载中

index.js

            
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            //加载（事件会在页面加载完成后触发）
        window.onload = function() {
            //获取滑动控件容器,灰色背景
            var dragContainer = document.getElementById("dragContainer");
            //获取滑块左边部分,绿色背景
            var dragBg = document.getElementById("dragBg");
            //获取滑动验证容器文本
            var dragText = document.getElementById("dragText");
            //获取滑块
            var dragHandler = document.getElementById("dragHandler");

            //滑块的最大偏移量 = 滑动验证容器文本长度 - 滑块长度
            var maxHandlerOffset = dragContainer.clientWidth - dragHandler.clientWidth;

            initDrag();

            function initDrag() {
                //在滑动验证容器文本写入“拖动滑块验证”
                dragText.textContent = "请拖动滑块验证";
                //给滑块添加鼠标按下监听
                dragHandler.addEventListener("mousedown", onDragHandlerMouseDown);
            }

            //选中滑块
            function onDragHandlerMouseDown() {
                //鼠标移动监听
                document.addEventListener("mousemove", onDragHandlerMouseMove);
                //鼠标松开监听
                document.addEventListener("mouseup", onDragHandlerMouseUp);
            }

            //滑块移动
            function onDragHandlerMouseMove() {
                /*
                html元素不存在width属性,只有clientWidth
                offsetX是相对当前元素的,clientX和pageX是相对其父元素的
                */
                //滑块移动量
                var left = event.clientX - dragHandler.clientWidth / 2;
                //
                if (left < 0) {
                    left = 0;
                    //如果滑块移动量   > 滑块的最大偏移量 ，则调用验证成功函数
                } else if (left > maxHandlerOffset) {
                    left = maxHandlerOffset;
                    verifySucc();
                }
                //滑块移动量
                dragHandler.style.left = left + "px";
                //绿色背景的长度
                dragBg.style.width = dragHandler.style.left;
            }

            //松开滑块函数
            function onDragHandlerMouseUp() {
                //移除鼠标移动监听
                document.removeEventListener("mousemove", onDragHandlerMouseMove);
                //移除鼠标松开监听
                document.removeEventListener("mouseup", onDragHandlerMouseUp);
                //初始化滑块移动量
                dragHandler.style.left = 0;
                //初始化绿色背景
                dragBg.style.width = 0;
            }

            //验证成功
            function verifySucc() {

                //容器文本的文字改为白色“验证通过”字体
                dragText.textContent = "验证通过";
                dragText.style.color = "white";
                //验证通过的滑块背景
                dragHandler.setAttribute("class", "dragHandlerOkBg");
                //移除鼠标按下监听
                dragHandler.removeEventListener("mousedown", onDragHandlerMouseDown);
                //移除 鼠标移动监听
                document.removeEventListener("mousemove", onDragHandlerMouseMove);
                //移除鼠标松开监听
                document.removeEventListener("mouseup", onDragHandlerMouseUp);
                // 匹配成功以后写入你要跳转的页面
                // window.location.href = "success.html";
                console.log("验证通过");
            };
        }

编辑器加载中

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