When attempting to register a custom Gamepad class using GamepadEvent, the conversion of the value to 'Gamepad' has failed

Question

When attempting to register a custom Gamepad class using GamepadEvent, the conversion of the value to 'Gamepad' has failed

I have been working on developing a virtual controller in the form of a Gamepad class and registering it. Currently, my implementation is essentially a duplicate of the existing Gamepad class:

class CustomController {
    readonly axes: ReadonlyArray<number>;
    readonly buttons: ReadonlyArray<GamepadButton>;
    readonly connected: boolean;
    readonly hapticActuators: ReadonlyArray<GamepadHapticActuator>;
    readonly id: string;
    readonly index: number;
    readonly mapping: GamepadMappingType;
    readonly timestamp: DOMHighResTimeStamp;

    constructor() {
        this.axes = [];
        this.buttons = [];
        this.connected = true;
        this.hapticActuators = [];
        this.id = "custom-id";
        this.index = 200;
        this.mapping = "standard";
        this.timestamp = Math.floor(Date.now() / 1000);
    }
}

To implement it, I used the following code:

const event = new GamepadEvent("gamepadconnected", {
    gamepad: new CustomController() as Gamepad
})
window.dispatchEvent(event);

However, an error message pops up stating:

Failed to construct 'GamepadEvent': Failed to read the 'gamepad' property from 'GamepadEventInit': Failed to convert value to 'Gamepad'.
TypeError: Failed to construct 'GamepadEvent': Failed to read the 'gamepad' property from 'GamepadEventInit': Failed to convert value to 'Gamepad'.

Seeking solutions: How can I successfully create and register my own custom Gamepad class with a GamepadEvent?

javascript typescript gamepad

Answer 1

Answer №1

The browser requires an actual game controller, not just any object resembling one.

If you need to simulate a game controller for testing purposes, here are some suggestions:

Suspend disbelief. Instead of convincing the browser there's a real game controller, you can simply imagine it in your code. This way, your code operates as if there is a game controller present without involving the browser.
```
 const myFakeGamepad = new MyJoystick();

 // Instruct your code to utilize the fake game controller
 navigator.getGamepads = function(){
   return [myFakeGamepad];
 };
```
Utilize a framework: There are resources available that allow you to simulate user input, such as a game controller. One recommended tool is puppeteer, which uses a web browser to mimic actions like button presses.
Advanced method: Modify the browser's code. While unconventional, you could potentially alter the browser's code to recognize your faux game controller. However, this approach may be excessive and require substantial effort.

Overall, opting for the first suggestion is likely the most practical choice.

Answer 2

The browser requires an actual game controller, not just any object resembling one.

If you need to simulate a game controller for testing purposes, here are some suggestions:

Suspend disbelief. Instead of convincing the browser there's a real game controller, you can simply imagine it in your code. This way, your code operates as if there is a game controller present without involving the browser.
```
 const myFakeGamepad = new MyJoystick();

 // Instruct your code to utilize the fake game controller
 navigator.getGamepads = function(){
   return [myFakeGamepad];
 };
```
Utilize a framework: There are resources available that allow you to simulate user input, such as a game controller. One recommended tool is puppeteer, which uses a web browser to mimic actions like button presses.
Advanced method: Modify the browser's code. While unconventional, you could potentially alter the browser's code to recognize your faux game controller. However, this approach may be excessive and require substantial effort.

Overall, opting for the first suggestion is likely the most practical choice.

When attempting to register a custom Gamepad class using GamepadEvent, the conversion of the value to 'Gamepad' has failed

Answer №1

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