# Prefer `KeyboardEvent#key` over `KeyboardEvent#keyCode`

💼 This rule is enabled in the ✅ `recommended` [config](https://github.com/sindresorhus/eslint-plugin-unicorn#preset-configs).

🔧 This rule is automatically fixable by the [`--fix` CLI option](https://eslint.org/docs/latest/user-guide/command-line-interface#--fix).

<!-- end auto-generated rule header -->
<!-- Do not manually modify this header. Run: `npm run fix:eslint-docs` -->

Enforces the use of [`KeyboardEvent#key`](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key) over [`KeyboardEvent#keyCode`](https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode) which is deprecated. The `.key` property is also more semantic and readable.

This rule is partly fixable. It can only fix direct property access.

## Fail

```js
window.addEventListener('keydown', event => {
	console.log(event.keyCode);
});
```

```js
window.addEventListener('keydown', event => {
	if (event.keyCode === 8) {
		console.log('Backspace was pressed');
	}
});
```

## Pass

```js
window.addEventListener('click', event => {
	console.log(event.key);
});
```

```js
window.addEventListener('keydown', event => {
	if (event.key === 'Backspace') {
		console.log('Backspace was pressed');
	}
});
```