SOURCE

const app = Vue.createApp({
    template: `
        <van-calendar
            v-model:show="calendarVisible"
            :min-date="new Date('2021-12-16')"
            :default-date="null"
        >
        </van-calendar>
        <van-button @click="calendarVisible = true">按钮</van-button>
    `,
    data() {
        return {
            calendarVisible: false
        }
    }
  });
  app.use(vant);
  app.mount('#app');

<div id="app"></div>