wxmini/pages/components/navbar/navbar.js

// components/navbar/navbar.ts
// 获取应用实例
const app = getApp();
Component({
  /**
   * 组件的属性列表
   */
  properties: {
    navbarData: { // 由父页面传递的数据
      type: Object,
      value: {},
      callback: ()=> {},
    },
  },
  externalClasses: ['nav-bgc-class', 'nav-title-class'],
  options: {
    multipleSlots: true,
  },
  /**
   * 组件的初始数据
   */
  data: {
    navBarHeight: app.globalData.navBarHeight,
    MenuButtonheight: app.globalData.MenuButtonheight,
    MenuButtonTop: app.globalData.MenuButtonTop,
  },

  /**
   * 组件的方法列表
   */
  methods: {
    _navback() {
      if(this.properties.navbarData.callback) {
        this.properties.navbarData.callback();
        return;
      };
      wx.navigateBack({
        delta: 1
      });
    }
  },
})