local JSON file loader in js

local JSON file loader in js

"use strict";

/**
 *
 * @author xgqfrms
 * @license MIT
 * @copyright xgqfrms
 * @created 2020-03-27
 *
 * @description
 * @augments
 * @example
 * @link https://stackoverflow.com/a/39571547/5934465
 *
 */

const log = console.log;

// import * as json from './datas.json';
// log(`json`, JSON.stringify(json), null, 4);

const loadJSON = (callback = (json = {}) => console.log(`json =\n`, json)) => {
  const xobj = new XMLHttpRequest();
  xobj.overrideMimeType("application/json");
  xobj.open('GET', './datas.json', true);
  // Replace 'my_data' with the path to your file
  xobj.onreadystatechange = () => {
    if (xobj.readyState === 4 && xobj.status === 200) {
      // Required use of an anonymous callback, as .open() will NOT return a value but simply returns undefined in asynchronous mode
      log(`xobj`, xobj);
      // callback(xobj.responseText);
      callback(xobj.response);
    }
  };
  xobj.send(null);
}

loadJSON((response) => {
  // Parse JSON string into object
  const json = JSON.parse(response);
  log(`json`, json);
  log(`json`, JSON.stringify(json, null, 4));
});

promise

async / await version ???

refs

---

---

xgqfrms 2012-2020

www.cnblogs.com 发布文章使用：只允许注册用户才可以访问！

---