Tiny, lightweight, cross-browser compatible. Only 461 bytes minified!
Copy & paste into a <script> tag, and modify line #16 with your own custom action!
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November 9, 2021 19:18
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| const KEY_DELAY = 2000; // Maximum time to allow in between key presses (Default: 2 seconds) | |
| const KONAMI_CODE = ['ArrowUp', 'ArrowUp', 'ArrowDown', 'ArrowDown', 'ArrowLeft', 'ArrowRight', 'ArrowLeft', 'ArrowRight', 'KeyB', 'KeyA']; | |
| let keyBuffer = []; | |
| let bufferTimeout; | |
| window.addEventListener('keyup', (evt) => { | |
| clearTimeout(bufferTimeout); | |
| bufferTimeout = setTimeout(() => { keyBuffer = []; }, KEY_DELAY); | |
| const next = keyBuffer.length; | |
| if (evt.code === KONAMI_CODE[next]) { | |
| keyBuffer.push(evt.code); | |
| if (keyBuffer.length === KONAMI_CODE.length) { | |
| // Change this with your desired action | |
| alert('Konami Code successfully entered!'); | |
| } | |
| } else { | |
| keyBuffer = []; | |
| } | |
| }); |
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