在获取数据onLoad中使用provider

// services/dataService.js
export const provideData = () => {
  return new Promise((resolve, reject) => {
    // 模拟异步数据获取
    setTimeout(() => {
      resolve({ data: 'Some fetched data' });
    }, 1000);
  });
};

// pages/examplePage/examplePage.js
import { provideData } from '../../services/dataService';

Page({
  data: {
    fetchedData: null,
  },
  onLoad: function (options) {
    this.fetchData();
  },
  fetchData: async function () {
    try {
      const result = await provideData();
      this.setData({ fetchedData: result.data });
    } catch (error) {
      console.error('Failed to fetch data:', error);
    }
  },
});

fetchData: async function () {
  try {
    const result = await Promise.race([
      provideData(),
      new Promise((_, reject) => setTimeout(() => reject(new Error('Timeout')), 5000)),
    ]);
    this.setData({ fetchedData: result.data });
  } catch (error) {
    console.error('Failed to fetch data:', error);
    // 提供备用方案，如显示缓存数据或错误提示
    this.setData({ fetchedData: 'Failed to load data. Please try again later.' });
  }
},