title: Checking of internet connection by requesting an image does not work after the image gets cached in the browser
body: <p>Checking of internet connection by requesting an image does not work after the image gets cached in the browser. After one or two time, this doesnt work as the image is stored in the browser's cache so is there any solution for that? or what do i need to check whether a connection is available or not? window.navigator.online is not reliable. so looking for the other interesting and reliable solution.</p>