reflex-base@0.10.0a2

Breaking Changes

• Require Python 3.11 or newer; Python 3.10 is no longer supported. (#7449)

Features

• A double-underscore state attribute (a name-mangled __private name or a dunder) can now be a backend var by declaring it with an explicit rx.field() value, e.g. __counter: rx.Field[int] = rx.field(0). Without one it stays a plain class attribute, like in 0.9.x. (#7465)

Bug Fixes

• Formatting a backend var as a string, e.g. width=f"{State._size}px", now raises BackendVarFormatError (a VarTypeError) instead of silently embedding the field's repr in the page. (#7456)
• Assign a value through a state class to update a declared field's default. The default cannot be a Field or Var instance, and must satisfy the field's annotation. A zero-argument callable the annotation does not accept becomes the default factory, validated by calling it once. (#7461)