Calculate to fit the screen size and keep aspect ratio.
This module made of WebModule.
<script src="<module-dir>/lib/WebModule.js"></script>
<script src="<module-dir>/lib/FitSize.js"></script>
<script>
FitSize.calc(500, 600, 350, 400) // -> { width: 500, height: 571, rario: 1.428 }
FitSize.calc(1920, 1080, 320, 480) // -> { width: 720, height: 1080, ratio: 2.25 }
</script>
importScripts("<module-dir>/lib/WebModule.js");
importScripts("<module-dir>/lib/FitSize.js");
require("<module-dir>/lib/WebModule.js");
require("<module-dir>/lib/FitSize.js");