added typescript types

index.d.ts

@@ -0,0 +1,58 @@
+declare module "gamepad.js" {
+  class GamepadListener {
+    constructor(options?: GamepadOptions);
+    start: () => void;
+    stop: () => void;
+    update: () => void;
+    discover: (gamepad: Gamepad, index: number) => void;
+    registerHandler: (index: number, gamepad: Gamepad) => void;
+    removeGamepad: (index: number) => void;
+    onAxis: (event: Event) => void;
+    on: GamepadEvent;
+    off: GamepadEvent;
+  }
+
+  class GamepadHandler {
+    constructor(index: number, gamepad: Gamepad, options?: GamepadOptions);
+    update: (gamepad: Gamepad) => void;
+    updateStick: (
+      gamepad: Gamepad,
+      stick: number,
+      axis: number,
+      value: number
+    ) => void;
+    updateButton: (
+      gamepad: Gamepad,
+      button: GamepadButton,
+      index: number
+    ) => void;
+  }
+
+  interface GamepadOptions {
+    analog: boolean;
+    precision: number;
+    deadZone: number;
+    button: {
+      analog: boolean;
+    };
+    stick: {
+      analog: boolean;
+      precision: number;
+      deadZone: number;
+    };
+  }
+
+  type GamepadEvent = (
+    event:
+      | "gamepad:connected"
+      | "gamepad:disconnected"
+      | "gamepad:axis"
+      | `gamepad:${number}:axis`
+      | `gamepad:${number}:axis:${number}`
+      | "gamepad:button"
+      | `gamepad:${number}:button`
+      | `gamepad:${number}:button:${number}`
+      | string,
+    handler: (e: Event) => void
+  ) => void;
+}