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Fix incorrect sizes calculations causing loading overhead image from … #2118
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…srcset If display has less width than height (like on mobile) then Math.round(slide.width / slide.height * 100)) can produce incorrect view port value for sizes attribute. For example : Device has width 689 and height 744. Image has 700 width and 506 height. So according to the code condition : 700/506 > 1 = true 689/744 > 1 = false then : 700/506*100 = 0.0138 So this generate sizes="138vw" which will be incorrect and a browser load a correct image from a srcset and also load another candidate from srcset which appropriate specified. But browser doesn't set this second candidate and everything looks normal except the thing that browser load this second image and therefore using additional traffic. You can check this in Dev Tools > Network
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…srcset
If display has less width than height (like on mobile) then Math.round(slide.width / slide.height * 100)) can produce incorrect view port value for sizes attribute.
For example :
Device has width 689 and height 744. Image has 700 width and 506 height.
So according to the code condition :
700/506 > 1 = true
689/744 > 1 = false
then :
700/506*100 = 0.0138
So this generate sizes="138vw" which will be incorrect and a browser load a correct image from a srcset and also load another candidate from srcset which appropriate specified. But browser doesn't set this second candidate and everything looks normal except the thing that browser load this second image and therefore using additional traffic.
You can check this in Dev Tools > Network