How to detect Chrome Inspect Element is running or not? [duplicate]

This question already has answers here: Find out whether Chrome console is open 开发者_JS百科 (24 answers) Closed 9 years ago.

Is there any way to detect whether the Chrome Inspect Element window is running?

For example if the user clicks "Inspect Element" in Chrome, the window shows a Hello World alert.

Is that possible?

---

UPDATE This no longer works. The property console.profiles has been removed in Chrome 29.

The only solution that's left is checking the difference between window.outerHeight and window.innerHeight as suggested by @Gerben. There is a library devtools-detect based on this method which adds devtoolschange to the window object.

Alternatively, there is an effort in progress to create a Chrome extension using a more robust detection method, see this Google Group.

---

Here's how they check if DevTools are open in the first challenge of Discover DevTools interactive course:

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

---

window.onresize = function(){
 if((window.outerHeight-window.innerHeight)>100)
   alert('hello');
}

In action: http://jsbin.com/ediquk/

Note that it seems like the resize event gets fired twice, so you should check whether you alerted the use already.