q&d fetch-gists from github

fetch-gists.js

// 3 June 2020
// memorializing this helper to track my too numerous gists

function fetchGists({ url, per_page, page, fn }) {
  console.group(`fetch ${ url } at ${ performance.now() }`);
  
  // url must be at least a string
  if (Object(url).toString() !== url) {
    console.error("param url should be a string");
    
    return console.groupEnd();
  }
  
  // set default printout fn for deserialized json results
  typeof fn == 'function' || (fn = (o) => { console.log(o.html_url, o.description); });

  fetch(`${ url }?per_page=${ per_page || 25 }&page=${ page || 1 }`)
    .then(res => res.json())
    .then(res => res.map(fn))
    .finally(function() { console.groupEnd(); });
}

/* test it out */

var url = 'https://api.github.com/users/dfkaye/gists';
var per_page = 100;
var page = 3;
var fn = (o) => { console.log(o.html_url, o.description); };

fetchGists({ });
fetchGists({ url });
fetchGists({ url, fn });
fetchGists({ url, per_page, fn });
fetchGists({ url, per_page, page, fn });

/* should see nested call groups except the first which logs param error */