Thread: An issue with the .opf
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Old 07-20-2025, 12:00 PM   #1
RbnJrg
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An issue with the .opf
I'm thinking to replace in my epub3 the JS program "Hyphenator" by the also JS program "Hyphenopoly". But I'm running into a problem: Hyphenopoly uses .wasm files as language patterns, which I include in Sigil's Misc folder. Hyphenopoly works fine, but when I open the epubs that contain it with Sigil, I get the following warning message:

Warning: the OPF contains missing or unrecognized media types...

Of course, in the .opf, the .wasm files have the media type 'application/wasm' that causes the warning. Is there a way to suppress that message? By the way, epubcheck also gives the same warning; by chance, are .wasm files prohibited files?
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