/**
 * Values correspond to "key" KeyboardEvent values. For applications that predate
 * KeyValue support, use the legacyKeyboardEventHandler.
 */
export declare enum KeyValue {
    Down = "ArrowDown",
    Enter = "Enter",
    Escape = "Escape",
    Left = "ArrowLeft",
    NextTV = "NextTV",
    PauseTV = "PauseTV",
    PlayTV = "PlayTV",
    PrevTV = "PrevTV",
    Right = "ArrowRight",
    Up = "ArrowUp"
}
/**
 * Maps "key" to legacy "keyCode" for KeyboardEvent values. Do not use directly,
 * instead use KeyValue plus "legacyKeyboardEventHandler".
 */
export declare enum KeyCode {
    Enter = 13,
    Escape = 27,
    ArrowUp = 38,
    ArrowDown = 40,
    ArrowLeft = 37,
    ArrowRight = 39,
    PauseTV = 19,
    PlayTV = 415,
    PrevTV = 412,
    NextTV = 417
}
/**
 * list of keycodes that need to have KeyValues attached for WebOS. These
 * need to map to matching KeyCode values and KeyValue values.
 */
export declare enum TVCodes {
    PauseTV = 19,
    PlayTV = 415,
    PrevTV = 412,
    NextTV = 417
}
/**
 * Inspects a KeyBoard event to determine if it "key" is present. If not, it
 * will insert it by inspecting "keyCode" and comparing against known matching
 * "key" values.
 *
 * This is necessary work around for:
 * - 2017 LG (webOS 3.5 / Chromium 38)
 */
export declare function legacyKeyboardEventHandler(callback: (event: KeyboardEvent) => void): (event: KeyboardEvent) => void;
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