ant-design-vue/components/avatar/demo/dynamic.md

#### 自动调整字符大小 对于字符型的头像，当字符串较长时，字体大小可以根据头像宽度自动调整。 #### Autoset Font Size For letter type Avatar, when the letters are too long to display, the font size can be automatically adjusted according to the width of the Avatar.

<template>
  <div>
    <a-avatar shape="square" size="large" :style="{'backgroundColor': color}">{{avatarValue}}</a-avatar>
    <a-button @click="changeValue">改变</a-button>
  </div>
</template>