<cn>
#### 更新消息内容
可以通过唯一的 key 来更新内容。
</cn>

<us>
#### Update Message Content
Update content with unique key.
</us>

```html
<template>
  <a-button type="primary" @click="openNotification">Open the notification box</a-button>
</template>
<script>
  const key = 'updatable'
  export default {
    methods: {
      openNotification () {
        this.$notification.open({
          key,
          message: 'Notification Title',
          description: 'description.',
        });
        setTimeout(() => {
          this.$notification.open({
            key,
            message: 'New Title',
            description: 'New description.',
          });
        }, 1000);
      },
    }
  }
</script>
```