font-weight on EPUB

Question

Hi, [Screenshot 1]On Id, there are font-weight (light, regular, medium, bold). On EPUB, medium on CONCLUSION.(4) is not presented well (I want to make it thinner than bold).So, I wrote:span.medium {font-weight: ;} [Screenhot 2]"font-weight: 900" works. [Screenshot 3]With font-weight: 100, I can't make medium on CONCLUSION.(4) much thinner than bold. Is there any workaround? Hosun

James Gifford—NitroPress · Accepted Answer

Nearly everything in EPUB is reader-dependent. It's likely that no two readers, even the same app on different platforms, will interpret any given document the same way.

But the standard/vanilla readers only intrerpret those four faces.

James Gifford—NitroPress · Answer

The only font weights that work consistently in EPUB are Regular, Bold, Italic and BoldItalic (by whatever specific names a given font might use). Other weights, whether named (Light, Semibold, Demi, Black, etc.) or numeric, will map to one of those four. I forget the numeric equivalent ranges for those four, off hand, but 100-500 will map to Regular, 600-900 to Bold.

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