Svelte – props downlifting (pattern) & uplifting (anti-pattern)

To feel oneself completely on foot you need to be able go back and forth, right? So here it goes...

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Svelte state downlifting (pattern)

You probably noticed I've used slots , I'll guess this is "at a good place at a good time" to exploit slots tho...

Svelte state uplifting (anti-pattern)

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If any suggestion how to improve the source code or relevant , please let me know in the comment section below . Take care !