When I tried to finish the challenge of nesting loops in javascript, I accidentally wrote a infinite loop like:
for(var i=0; i < array.length; i++)
for(var j=0; i < array[i].length; j++)
....
Then I clicked Run test button. All dead! Even after I kill the page and enter the page again.
I suggest DO NOT run the solution automatically when user just land on the page.
Any other thoughts?