Pinterest mega-widget, as seen on http://about.pinterest.com/use

getPinsOnBoard.js

// this snippet requires pinit.js to be loaded with data-pin-build="doBuild"

// turn pin IDs into embedPin links
var render = function (r, el) {
  if (r && r.status === 'success' && r.data && r.data.pins) {
    var p = r.data.pins;
    var parent = el.parentNode;
    parent.innerHTML = '';
    for (var i = 0; i < p.length; i = i + 1) {
      var span = document.createElement('SPAN');
      var a = document.createElement('A');
      a.setAttribute('data-pin-do', 'embedPin');
      a.href = 'http://pinterest.com/pin/' + p[i].id;
      span.appendChild(a);
      parent.appendChild(span);
    }
    // fire doBuild, which is onboard pinit.js
    doBuild(parent);
  }
};

// callback array
var cb = [];

// ping an endpoint
var call = function (slug, el) {
  var n = cb.length;
  var id = 'cb[' + n + ']';

  // create the callback
  cb[n] = function (r) {
    render(r, el);
  };

  // make the call
  var s = document.createElement('SCRIPT');
  s.src = '//widgets.pinterest.com/v3/pidgets/boards/'+ slug + 'pins' + '?callback=' + id;
  s.type = 'text/javascript';
  s.charset = 'utf-8';
  document.body.appendChild(s);
};

// search for links like this:
// <a data-pin-do="embedBigBoard" href="http://pinterest.com/kentbrew/high-five">High Five</a>
var a = document.getElementsByTagName('A');
for (var i = 0; i < a.length; i = i + 1) {
  if (a[i].getAttribute('data-pin-do') === 'embedBigBoard') {
    var slug = a[i].href.split('.com/')[1];
    if (slug) {
      // call API
      call(slug, a[i]);
    }
  }
}