"usingComponents": {
  "van-switch": "@vant/weapp/switch/index"
}

<van-switch checked="{{ checked }}" bind:change="onChange" />

Page({
  data: {
    checked: true,
  },

  onChange({ detail }) {
    // 需要手动对 checked 状态进行更新
    this.setData({ checked: detail });
  },
});

<van-switch checked="{{ checked }}" disabled />

<van-switch checked="{{ checked }}" loading />

<van-switch checked="{{ checked }}" size="24px" />

<van-switch
  checked="{{ checked }}"
  active-color="#07c160"
  inactive-color="#ee0a24"
/>

<van-switch checked="{{ checked }}" bind:change="onChange" />

Page({
  data: {
    checked: true,
  },

  onChange({ detail }) {
    wx.showModal({
      title: '提示',
      content: '是否切换开关？',
      success: (res) => {
        if (res.confirm) {
          this.setData({ checked2: detail });
        }
      },
    });
  },
});