import type { InputTextValidationRule } from "../../types/components/input-text";
/**
 * Maps a native `ValidityState` to the first failing validation rule, so the
 * per-rule error copy can be picked. Order matters: an empty required field is
 * reported as `required` even if other constraints would also fail.
 *
 * `typeMismatch` lands in `format` even without `validation.format`, since a
 * `keyboard_type: "email"` input is `type="email"` and fails the same way.
 * `stepMismatch` (a non-integer on the `numeric` keyboard) falls back to
 * `format` as well.
 *
 * `customError` is only ever set by the component itself, for the constraints
 * it checks instead of the browser (`maxLength`, and a `pattern` the browser
 * cannot compile); `customRule` says which one failed.
 */
export declare function failingRuleFromValidity(validity: ValidityState, customRule?: InputTextValidationRule | null): InputTextValidationRule | null;