Function checkMissingConditions

packages/next-routing/src/matchers.ts:120–140

(
  missing: RouteHas[] | undefined,
  url: URL,
  headers: Headers
)

 * Checks if all "missing" conditions are satisfied (i.e., none of them match)
 */
export function checkMissingConditions(
  missing: RouteHas[] | undefined,
  url: URL,
  headers: Headers
): boolean {
  if (!missing || missing.length === 0) {
    return true
  }

  for (const condition of missing) {
    const actualValue = getConditionValue(condition, url, headers)
    const result = matchesCondition(actualValue, condition.value)

    // If any missing condition matches, the check fails
    if (result.matched) {
      return false
    }
  }

  return true
}