Quote:
Originally Posted by KevinH
They are not recognized media file types according to the epub 3.3 spec. You may be able to "hide" them in the METAINF folder but not sure. WebAssembly files do not run with every browser.
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For those who want to try using Hyphenopoly in their epubs to add hyphenation, I report that your idea of hiding the .wasm files in the META-INF folder is effective. There are no errors or warnings reported by Sigil, and epubCheck also finds no errors, while e-readers can find and use those files.
So, until "media type 'application/wasm'" is approved, placing the .wasm files in META-INF works.
By the way, except for IE, practically all browser supports .wasm:
https://caniuse.com/wasm