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Thanks! I haven't looked deeply into font yet, but I've always been partial to HarfBuzz for shaping, so will probably build on top of that. It also has an experimental Wasm shaper which certainly served as a bit of inspiration for the design of this.

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There is a well maintained Wasm build of harfbuzz: <https://github.com/harfbuzz/harfbuzzjs> with both OpenType and AAT shapers support, which should be enough but you can also provide your own shaper implementation in Wasm yes.

We're successfully using Wasm harfbuzz to render text in a web-based design tool with relatively high usage so there should be no issues integrating it :)

Nice! Looking forward to your alpha release. (And eventual HarfBuzz integration.)

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