Helpful snippets for chrome

snippet.js

(() => {
  const convertCallback = (cb, value, status, defaultLetter) => {
    if (typeof cb === 'function') {
      cb(value);
    } else if (typeof cb === 'string' || typeof cb === 'undefined') {
      const letter = typeof cb === 'string' ? cb : defaultLetter;
      window[letter] = value;

      console.log(`request ${status}, stored in variable: ${letter}, below is the value:`);
      console.log(value);
    }

    return value;
  };

  const reqJson = async (url, onSuccess, onFail) => {
    try {
      const res = await (await fetch(url)).json();
      return convertCallback(onSuccess, res, 'sucessful', 'a');
    } catch (e) {
      return convertCallback(onFail, e, 'fail', 'e');
    }
  };

  window.reqJson = reqJson;
})();