【HTML】在图标上绘制圆圈数字提示符

源码 

<!DOCTYPE html>
<html>
    <head>
        <title>图标上绘制圆圈数字</title>
    </head>
    <body>
        <div style="width:32px; height:32px; position:relative; background-color:#0000; z-index:0;">
            <img src="data:image/png;base64,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">
        <!--布局 display:flex-->
        <!--垂直居中 align-items: center-->
        <!--水平居中 justify-content: center;-->
        <!--文本布局 text-align:justify-->
        <!--区域宽度 width:16px;-->
        <!--区域高度 height:16px;-->
        <!--位置类型 position:absolute; 绝对定位 absolute; 相对定位 relative-->
        <!--左侧距离 left: 16px;-->
        <!--顶部距离 top: 0px;-->
        <!--字体颜色 color:#FFF;-->
        <!--背景颜色 background-color:#F00;-->
        <!--(IE)元素透明度 filter:alpha(opacity=50);-->
        <!--(FF)元素透明度 opacity:0.6;-->
        <!--(moz+f)元素透明度 -moz-opacity:0.6;-->
        <!--堆叠序号 z-index:1;-->
        <!--边角半径 border-radius:50%;-->
        <div style="display:flex; align-items: center;justify-content: center;text-align:justify;z-index:1;
        position:absolute;left: 16px; top: 0px;width:16px;font-size:6px; height:16px;border-radius:50%;
        color:#FFF; background-color:#F00;
        filter:alpha(opacity=50); opacity:0.6;-moz-opacity:0.6;">99</div>
        </div>
    </body>
</html>

效果

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转载自blog.csdn.net/chenlu5201314/article/details/104397503