fix: Correct copy for specific code block [Svelte]

[wyMinLwin]

The problem is for Svelte code block which used TypeScript selecting the element which doesn't exist.

Code block selection improvements:

• Enhanced the query logic to check the code block's language and use pre:last-of-type code for Svelte samples when the TypeScript toggle is enabled, ensuring the correct code is copied for Svelte examples.
• Retained the original query for TypeScript and default cases, preserving expected behavior for other languages.

[vercel]

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[7nik]

I wonder if we can go with more simple

const code = parent.querySelectorAll("code")[ts ? 1 : 0];

[wyMinLwin]

I wonder if we can go with more simple

const code = parent.querySelectorAll("code")[ts ? 1 : 0];

No it's because if you do like that it would lead back to issue #1406
which is copying wrong TypeScript code.

For current issue your solution will be fine but we need to think about what happened in issue #1406 as well

[7nik]

pre:last-of-type code has the same problem, right? (any single pre is :last and :last-of-type)

We should just select only "top-level" code blocks:

const code = parent.querySelectorAll(":scope > pre > code")[ts ? 1 : 0];

[wyMinLwin]

pre:last-of-type code has the same problem, right? (any single pre is :last and :last-of-type)

We should just select only "top-level" code blocks:

const code = parent.querySelectorAll(":scope > pre > code")[ts ? 1 : 0];

This work Great!
I updated the code. Thanks.