<svelte:window on:keydown /> event.preventDefault() does nothing

[andykais]

Describe the bug

I discovered that the svelte:window keydown event is not a native browser keydown event. This came up because I have a use case of using the "/" key to focus an input element, but I have no (clean) way to prevent the "/" key from being written to the input element using the svelte handler.

I have a workaround that is fine (just using the native browser keydown event). Just pointing out that it feels like this is a weird reason to need to use the browser native listener and move out of the svelte ecosystem.

Reproduction

the following snippet will focus the input element and write the "/" character to the input element. What I want to happen is just focus the input and ignore the "/" character.

<script>
  function handle_keydown(e) {
    if (e.code === 'KeySlash') {
      e.preventDefault()
      input.focus()
    }

  let input
  }
</script>

<svelte:window on:keydown={handle_keydown} />

<input bind:this={input} />

I have proven that this is an issue with the svelte keydown event specifically because I can accomplish the behavior I want with document.addEventListener('keydown', handle_keydown).

Logs

System Info

using firefox 136.0, Svelte kit:

	"devDependencies": {
		"@deno/vite-plugin": "^1.0.4",
		"@sveltejs/adapter-auto": "^4.0.0",
		"@sveltejs/kit": "^2.16.0",
		"@sveltejs/vite-plugin-svelte": "^5.0.0",
		"@tailwindcss/vite": "^4.0.0",
		"svelte": "^5.0.0",
		"svelte-check": "^4.0.0",
		"tailwindcss": "^4.0.0",
		"typescript": "^5.0.0",
		"typescript-svelte-plugin": "^0.3.45",
		"vite": "^6.0.0"
	},


running on deno.

Severity

annoyance

[andykais]

[update] please disregard the above bug. I had a layer in my code creating the synthetic event. This was my fault 😅