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svelte/documentation/tutorial/16-special-elements/04-svelte-window/app-a/App.svelte

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<script>
let key;
let code;
function handleKeydown(event) {
key = event.key;
code = event.code;
}
</script>
<svelte:window />
<div style="text-align: center">
{#if key}
<kbd>{key === ' ' ? 'Space' : key}</kbd>
<p>{code}</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>