use-konami-code

Konami Code React Hook

What is it?

Allows you to useKonamiCode to listen in on any React Functional Component for the Konami Code sequence. Provide an onSuccess and onFail callback.

Eg:

import { useKonamiCode } from 'use-konami-code';
import { useState } from 'react';

const HomeComponent: React.FC<any> = () => {
    const [ message, setMessage ] = useState('');
    useKonamiCode(() => {
        setMessage('You did it!');
    }, () => {
        setMessage('');
    });

    return (
        <div>
            { message && <span>{message}</span> }
        </div>
    )
}

Custom Code Sequence

You can also provide an alternate code sequence, a String[] consisting of JavaScript Event Keycodes, as a third parameter, eg:

    const alternateKonamiCode = ['ArrowUp', 'ArrowUp', 'ArrowDown', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'ArrowLeft', 'ArrowRight', 'b', 'a', 'b', 'a', 'Enter'];

    useKonamiCode(() => {
        setMessage('you do remember!');
    }, () => {
        setMessage('');
    }, alternateKonamiCode);

Try Keycode.info to set up your own code.

What is the Konami Code?

From Wikipedia:

The Konami Code (Japanese: コナミコマンド, Konami komando, "Konami command") is a cheat code that appears in many Konami video games, and some non-Konami games. In the original code, the player can press the following sequence of buttons on the game controller to enable a cheat or other effects:

↑ ↑ ↓ ↓ ← → ← → B A

Author

James Perih @ Four And A Half Giraffes, Ltd.