ant-design-vue/antdv-demo/docs/button/demo/block.md

#### block 按钮 `block`属性将使按钮适合其父宽度。 #### block Button `block` property will make the button fit to its parent width.

<template>
  <div>
    <a-button type="primary" block>
      Primary
    </a-button>
    <a-button block>
      Default
    </a-button>
    <a-button type="dashed" block>
      Dashed
    </a-button>
    <a-button type="danger" block>
      Danger
    </a-button>
    <a-button type="link" block>
      Link
    </a-button>
  </div>
</template>