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

<van-rate value="{{ value }}" bind:change="onChange" />

Page({
  data: {
    value: 3,
  },

  onChange(event) {
    this.setData({
      value: event.detail,
    });
  },
});

<van-rate
  value="{{ value }}"
  icon="like"
  void-icon="like-o"
  bind:change="onChange"
/>

<van-rate
  value="{{ value }}"
  size="{{ 25 }}"
  color="#ffd21e"
  void-icon="star"
  void-color="#eee"
  bind:change="onChange"
/>

<van-rate
  value="{{ value }}"
  allow-half
  void-icon="star"
  void-color="#eee"
  bind:change="onChange"
/>

Page({
  data: {
    value: 2.5,
  },

  onChange(event) {
    this.setData({
      value: event.detail,
    });
  },
});

<van-rate value="{{ value }}" count="{{ 6 }}" bind:change="onChange" />

<van-rate disabled value="{{ value }}" bind:change="onChange" />

<van-rate readonly value="{{ value }}" bind:change="onChange" />

<van-rate value="{{ value }}" bind:change="onChange" />

Page({
  data: {
    value: 2,
  },

  onChange(event) {
    Toast('当前值：' + event.detail);
  },
});