How to check Developer tool window open

check1.js

function isInspectOpen()
{
    console.profile(); 
    console.profileEnd(); 
    if (console.clear) console.clear();
    return console.profiles.length > 0;
}

check2.js

window.onresize = function()
{
    if ((window.outerHeight - window.innerHeight) > 100)
        alert('Docked inspector was opened');
}

check3.js

var checkStatus;

var element = new Image();
// var element = document.createElement('any');
element.__defineGetter__('id', function() {
    checkStatus = 'on';
});

setInterval(function() {
    checkStatus = 'off';
    console.log(element);
    console.clear();
    document.querySelector('#devtool-status').innerHTML = checkStatus;
}, 1000)

check4.js

var element = new Image();
Object.defineProperty(element, 'id', {
  get: function () {
    /* TODO */
    alert('囧');
  }
});
console.log('%cHello', element);