/**
 * Percent-decodes a string without throwing on malformed input.
 *
 * `decodeURIComponent` throws a `URIError` for a literal percent sign (e.g. `'50% off'`). This
 * pre-escapes any percent that is not part of a valid escape sequence so it survives decoding as-is.
 *
 * @param value The string to decode.
 * @returns The decoded string, or the original string if it cannot be decoded.
 */
export declare function safeDecodeURIComponent(value: string): string;
/**
 * Repeatedly percent-decodes a value until it stops changing, unwrapping multiply-encoded input.
 *
 * @param value The string to decode.
 * @returns The fully decoded string.
 */
export declare function decodeNestedURI(value: string): string;
/**
 * Decodes a value taken from a query string, where `+` denotes a space.
 *
 * The HawkSearch API returns query-string-encoded values (`FieldQSValue`, `RawValue`). Plus signs
 * must be converted to spaces *before* percent-decoding, so that a genuine plus encoded as `%2B`
 * is preserved.
 *
 * @param value The query-string-encoded value.
 * @returns The decoded value.
 */
export declare function decodeQueryStringValue(value: string): string;