answer-mini/wechat-app/static/vant/mixins/button.js

export const button = Behavior({
  externalClasses: ['hover-class'],
  properties: {
    id: String,
    lang: String,
    businessId: Number,
    sessionFrom: String,
    sendMessageTitle: String,
    sendMessagePath: String,
    sendMessageImg: String,
    showMessageCard: Boolean,
    appParameter: String,
    ariaLabel: String,
  },
});