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Part 3 / Special elements / <svelte:window>

Just as you can add event listeners to any DOM element, you can add event listeners to the window object with <svelte:window>.

On line 11, add the keydown listener:

App.svelte
<svelte:window on:keydown={handleKeydown}/>

As with DOM elements, you can add event modifiers like preventDefault.

Next: <svelte:window> bindings

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<script>
	let key;
	let keyCode;
 
	function handleKeydown(event) {
		key = event.key;
		keyCode = event.keyCode;
	}
</script>
 
<svelte:window />
 
<div style="text-align: center">
	{#if key}
		<kbd>{key === ' ' ? 'Space' : key}</kbd>
		<p>{keyCode}</p>
	{:else}
		<p>Focus this window and press any key</p>
	{/if}
</div>
 
<style>
	div {
		display: flex;
		height: 100%;
		align-items: center;
		justify-content: center;
		flex-direction: column;
	}
 
	kbd {
		background-color: #eee;
		border-radius: 4px;
		font-size: 6em;
		padding: 0.2em 0.5em;
		border-top: 5px solid rgba(255, 255, 255, 0.5);
		border-left: 5px solid
			rgba(255, 255, 255, 0.5);
		border-right: 5px solid rgba(0, 0, 0, 0.2);
		border-bottom: 5px solid rgba(0, 0, 0, 0.2);
		color: #555;
	}
</style>
initialising