Devtools Status Detector

This extension helps Javascript developers detect when Chrome Devtools is open or closed on current page.

When Chrome Devtools closes/opens, the extension will raise a event named 'devtoolsStatusChanged' on window.document element.

This is example code:

 function addEventListener(el, eventName, handler) {
    if (el.addEventListener) {
        el.addEventListener(eventName, handler);
    } else {
        el.attachEvent('on' + eventName,
            function() {
                handler.call(el);
            });
    }