reactjs - Can I use Next.js frontend app as Block in Shopify's Theme App Extensions instead of liquid?
Go for it. You can do whatever you want in a block. You control the HTML(Liquid), JS, and CSS.
Note that you are probably killing a fly with a sledgehammer but that is your burden to bear. If your block is somehow slow or in-efficient, it'll show, but maybe it'll be zippy and great. Just throw down the code and see what happens. Should not take you more than a few minutes to establish whether you like it or not.
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