Feature Request: Ensure Space-Separated Values for ARIA Attributes

[daviareias]

Describe the problem

Currently, passing an array to ARIA attributes in Svelte (e.g., aria-describedby, aria-labelledby, etc.) results in a comma-separated string ("id1,id2"). However, per ARIA spec, multiple IDs should be space-separated ("id1 id2").

The following code:

<input aria-describedby={["id1", "id2"]} />

Should render as:

<input aria-describedby="id1 id2">

But it renders as:

<input aria-describedby="id1,id2">

Affected Attributes

• aria-describedby
• aria-labelledby
• aria-owns
• Any ARIA attribute accepting multiple IDs

Describe the proposed solution

When an array is passed to ARIA attributes, join values with a space instead of a comma.

Would love to hear thoughts on this! Thanks! 🙌

Importance

would make my life easier

[Thiagolino8]

Aria properties don't accept arrays, only strings
What is happening is that whenever you use an array in a place that only accepts strings a coercion is made using <array>.toString()
If you want a string to be generated the way you prefer just use <array>.join()

[dummdidumm]

Correct - closing since we're not going to add support for stringification of arrays.