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wizzard

nav-no-target

{ ok: false, reason: 'no-target', code: 'nav-no-target', url: '…/errors/nav-no-target' }

Returned, not thrown, by next(), back() and go(). Nothing is written, and there is no by.

The engine could not name a step to move to. The causes are:

  • back() on the first reachable step. There is nothing before it; canBack is false here, and a Back button disabled by it never produces this.
  • go(id) with an id that is not a key of steps, most often a typo.
  • back() from a step whose on.back names a step that does not exist.
  • next() from a step whose on.next is a list of { to, when } entries and no entry’s when holds. The transition decides where the step leads, so the engine does not guess: add an entry without a when as the last one - the step to go to otherwise, or '@end' to finish.

next() on the last step of order, with no on.next, is not one of them: it finishes the wizard, answers { ok: true, to: '@end' } and sets status to done.

Disable Back with canBack rather than handling this result. For an id, correct it or add the step; validateFlow reports an on.back to a missing step as target-unknown-step before the wizard ever runs.