After a long, long period of debate and competition, web development finally has the markup and syntax it needs for responsive bitmap images: the element, together with the srcset and sizes attributes. You can set your own weights using an options object with the init method, but if you are planning using the device-based breakpoints from the fixed pixel widths, relative widths and Bootstrap 4 sample stylesheets, it's suggested you keep the default weights. firstChild instanceof HTMLSourceElement) video. Read Responsive Images Done Right: A Guide To And srcset for more.. After The Great Vendor Prefix Hullaballoo of April 2012 comes The Great Responsive Images Brouhaha of May 2012.. Adaptive images are the next unsolved mystery of Responsive Web Design. You may use the CSS rules in an external stylesheet or inline styles in the document . Be gentle when reporting them, please. The days of fixed-width, pixel perfect website design are well and truly behind us. Let's look at an example of