personal_site/assets/blog/emscripten_arduino/loader.js

var statusElement = document.getElementById('status');
var progressElement = document.getElementById('progress');
var spinnerElement = document.getElementById('spinner');

var Module = {
  preRun: [],
  postRun: [],
  print: (function() {
    var element = document.getElementById('output');
    if (element) element.value = ''; // clear browser cache
    return function(text) {
      if (arguments.length > 1) text = Array.prototype.slice.call(arguments).join(' ');
      console.log(text);
      if (element) {
        element.value += text + "\n";
        element.scrollTop = element.scrollHeight; // focus on bottom
      }
    };
  })(),
};