Change Shear X (or Y) on a bone in Setup and export. Bone object in JSON does not include shearX (or shearY).
Bone Shear is not exported to JSON
- تم التحرير
most likely because no runtimes support it. But you are running you own runtime (from post spine.js: Spine JavaScript Runtime ) (?) 
Sorry about that! Fixed in 3.2.01. 