xstate@6.0.0-beta.1

Patch Changes

• 599ec3c: Unknown transition targets are now type errors in setup().createMachine(...), not only in createMachine(...). Targets returned from transition functions are also checked:

  setup({}).createMachine({
    initial: 'a',
    states: {
      a: {
        on: {
          // Type error: 'bb' is not a state
          GO: () => ({ target: 'bb' })
        }
      },
      b: {}
    }
  });

  Dynamic (non-literal) string targets are still accepted.