用於進行數量提示。 角標的核心類是.mui-badge，默認爲實心灰色背景；同時，mui還內置了藍色（blue）、綠色(green)、黃色(yellow)、紅色(red)、紫色(purple)五種色系的數字角標
<span class="mui-badge">1123</span>
<span class="mui-badge mui-badge-primary">11232</span>
<span class="mui-badge mui-badge-success">112323</span>
<span class="mui-badge mui-badge-warning">1233</span>
<span class="mui-badge mui-badge-danger">41235</span>
<span class="mui-badge mui-badge-purple">412356</span>