0nitro/priv/js/validation.js

function validateSources(list){
  return list.reduce(function(acc, x){
    var event = new CustomEvent('validation');
        event.initCustomEvent('validation', true, true, querySourceRaw(x));
    var el = qi(x),
        listener = el && el.validation,
        res = !listener || listener && el.dispatchEvent(event);
    if(!res){ console.log("Validation failed:" + x); }
    if(el) el.style.background = res ? '' : 'pink';
    return res && acc;
  },true);
}

(function(){
  function CustomEvent(event, params){
    params = params || { bubbles: false, cancelable: false, detail: undefined };
    var evt = document.createEvent( 'CustomEvent' );
    evt.initCustomEvent(event, params.bubbles, params.cancelable, params.detail);
    return evt;
  }
  CustomEvent.prototype = window.Event.prototype;
  window.CustomEvent = CustomEvent;
})();