Function checkRecursiveUpdates

packages/runtime-core/src/scheduler.ts:270–290

(seen: CountMap, fn: SchedulerJob)

}

function checkRecursiveUpdates(seen: CountMap, fn: SchedulerJob) {
  const count = seen.get(fn) || 0
  if (count > RECURSION_LIMIT) {
    const instance = fn.i
    const componentName = instance && getComponentName(instance.type)
    handleError(
      `Maximum recursive updates exceeded${
        componentName ? ` in component <${componentName}>` : ``
      }. ` +
        `This means you have a reactive effect that is mutating its own ` +
        `dependencies and thus recursively triggering itself. Possible sources ` +
        `include component template, render function, updated hook or ` +
        `watcher source function.`,
      null,
      ErrorCodes.APP_ERROR_HANDLER,
    )
    return true
  }
  seen.set(fn, count + 1)
  return false
}