vant-weapp/dist/mixins/button.js

export const button = Behavior({
    properties: {
        id: String,
        appParameter: String,
        sendMessageTitle: String,
        sendMessagePath: String,
        sendMessageImg: String,
        showMessageCard: String,
        hoverStopPropagation: Boolean,
        hoverStartTime: {
            type: Number,
            value: 20
        },
        hoverStayTime: {
            type: Number,
            value: 70
        },
        lang: {
            type: String,
            value: 'en'
        },
        sessionFrom: {
            type: String,
            value: ''
        }
    }
});