Added srcset tags to product thumbnails #483
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There is a point just beneath the xs bootstrap 4 breakpoint (<576px) where the product thumbnail images are pixelated due to being too large. The srcset tag accommodates for this point and also retina devices where the ppi is much higher (2x).
Here is a comparison on an iPhone X.
Before:
After:
The breakpoints were chosen according to the default thumbnail dimensions of 200 and 500. If a browser does not support the srcset tags, the src tag is used instead which points to the lower res image.