Down and Dirty with Chrome Developer Tools


The console provides the following useful commands:

  • assert - A simple assertion API to verify functionality
  • time and timeEnd - Measure how long something takes
  • timeStamp - Programatically mark the timeline.
  • debugger - Force the debugger to break
  • profile and profileEnd - Programatically start and stop a CPU profile
console.assert($('#my-component').length, "My component exists on the page");

console.time("ajax request");
$.get('/some/url', function() {
    // Will print to the screen the 
    // elapsed time between start and end
    console.timeEnd("ajax request");

function removeCalendar() {
    console.timeStamp("removing calendar");
    calendarDisplayed = false;