shyaf-artist-platform-miniapp/pages/invitation/protocol/index.js

const app = getApp();
Page({
  /**
   * 生命周期函数--监听页面加载
   */
  onLoad: async function (options) {
    wx.setNavigationBarTitle({
      title: '防疫须知'
    });
  },

  /**
   * 打开邀请函页面
   */
  openLetter: function() {
    wx.redirectTo({
      url: '/pages/invitation/letter/index?pageCode=protocol',
    });
  }
})