Runtime & Logic

Runtime logic evaluates conditions, Template Expressions, run-code, validation, helper scripts, $quota snapshots, answer piping, simulation, and Survey Link flow.

Logic GuideWhere JavaScript fragments, Template Expressions, helpers, $curr, $now, $params, $quota, and $status run.Overlay Runtime/overlay authoring, per-language entry fragments, ?lang runtime application, lang/dir metadata, and unavailable states.Question ObjectsRead-only metadata, answer readers, $curr, $quota, option/attribute aliases, and run-code mutation methods.Validation & ErrorsQuestion-local validation, error rendering, and runtime-safe fallback behavior.