css 提示

下面是完整的 CSS 提示框示例代码：

<!doctype html>
<html>
<head>
    <style>
         /*---1-------------------------------------------
            	通用
        -------------------------------------------------*/    
        .tooltip{
            position: relative;
            top: 120px;
            display: inline-block;
            border-bottom:1px dotted black;
        }
        /*---2-------------------------------------------
            	这里是上拉文字的
        -------------------------------------------------*/    
       .tooltiptexttop{
            visibility: hidden;
            width:120px;
            background-color: black;
            color:#fff;
            text-align: center;
            border-radius: 6px;
            padding: 5px 0;
            position: absolute;
            z-index: 1;
            bottom: 150%;
            left: 50%;
            margin-left:-60px;
        }
        .tooltip .tooltiptexttop::after{
            content:"";
            position: absolute;
            top: 100%;
            left:50%;
            margin-left: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: black transparent transparent transparent;
        }
        .tooltip:hover .tooltiptexttop{
            visibility: visible;
        }
        /*---3-------------------------------------------
            	这里是左拉文字的
        -------------------------------------------------*/  
        .tooltip .tooltiptextleft{
            visibility: hidden;
            width:120px;
            background-color: black;
            color: #fff;
            text-align: center;
            padding: 5px 0;
            position: absolute;
            z-index: 1;
            top: -5px;
            right: 105%;
        }
        .tooltip:hover .tooltiptextleft{
            visibility: visible;
        }


        /*---4-------------------------------------------
            	这里是下拉文字的
        -------------------------------------------------*/  
        .tooltip .tooltiptextbottom{
            visibility: hidden;
            width: 120px;
            background-color: #000;
            color: white;
            text-align: center;
            border-radius: 6px;
            padding: 5px 0;
            position: absolute;
            z-index: 1;
            top: 100%;
            left:50%;
            margin-left: -60px;
            opacity: 0;
            transition: opacity 1s;
        }
        .tooltip:hover .tooltiptextbottom{
            visibility: visible;
            opacity: 1;
        }


        /*---5-------------------------------------------
            	这里是右拉文字的
        -------------------------------------------------*/  
        .tooltip .tooltiptextright{
            visibility: hidden;
            width:120px;
            background-color: black;
            color: #fff;
            text-align: center;
            border-radius: 6px;
            padding: 5px 0;
            position: absolute;
            z-index: 1;
            top: -5px;
            left: 110%;
        }
        .tooltip .tooltiptextright::after{
            content: "";
            position: absolute;
            top: 50%;
            right: 100%;
            margin-top: -5px;
            border-width: 5px;
            border-style: solid;
            border-color: transparent black transparent transparent;
        }
        .tooltip:hover .tooltiptextright{
            visibility:visible;
        }
    </style>
</head>
<body style="text-align:center;">
    <div class="tooltip">在上面的标签
        <span class="tooltiptexttop">我是不是在上面</span>
    </div></br>
    <div class="tooltip">在左边的标签
        <span class="tooltiptextleft">我是不是在做面</span>
    </div></br>
    <div class="tooltip">在下面的标签
        <span class="tooltiptextbottom">渐渐弹出在下面</span>
    </div></br>
    <div class="tooltip">在右面的标签
        <span class="tooltiptextright">在右面有箭头的</span>
    </div>
</body>
</html>