nsgk_wechat/nsgk_entry/component/scrollTab/scrollTab.js

// component/tabbar/tabbar.js
let APP = getApp();
Component({
    /**
     * 组件的属性列表
     */
    properties: {
   
        tabs: { type: Array, value: [] },
        activeTab:{type:Number,value:0}

    },

    /**
     * 组件的初始数据
     */
    data: {
    
    },

    /**
     * 组件的方法列表
     */
    methods: {
        handleTabClick: function handleTabClick(e) {
            let {index, item} = e.currentTarget.dataset;
            this.setData({ activeTab: index });
            this.triggerEvent('tabclick', { choiceIndex: index, item:item });
          },
          
    }
})