import Ember from 'ember'; Ember.onerror = function(error) { log(error.stack); }; export default function log(...args) { let msg = args.join(' '); let logs = document.getElementById('logs'); if (!logs) { logs = document.createElement('pre'); document.body.appendChild(logs); } logs.insertBefore( document.createTextNode("\n" + msg), logs.firstChild ); }