Does IE9 enable 'something' when using developer tools?

Question

Im using Google Maps Javascript API V3, and recently the icons on my map aren\'t showing up in IE9.

To get to the bottom of it, I turned on IE\'s developer t

Answer 1

Any references to the global console object will only work if the IE Developer Tools are open. If the developer tools are closed, the global console object is undefined.

For example, the following code will only run if the developer tools are open. If they're closed, they'll throw an error about console being undefined:

console.log("test");

Answer 2

If you have any console prints in your code, these would throw exceptions (hence breaking the javascript after it) if the page was loaded when the developer tools were closed.

to fix this, wrap your prints in an if statement:

if (console) {
   console.log('...');
}