Validate itemsToShow Configuration

[ismail9k]

The itemsToShow option in vue3-carousel should be validated to ensure it falls within a reasonable range. Currently, it allows invalid values, which can break the carousel.

Expected Behavior

• itemsToShow should satisfy: 1 <= itemsToShow <= slidesCount
• If itemsToShow is less than 1, it should default to 1.
• If it exceeds slidesCount, it should default to slidesCount.

Steps to Reproduce

1. Set itemsToShow to a value less than 1 or greater than slidesCount.
2. Observe the broken or unintended behavior.

Proposed Solution

• Add validation logic to enforce 1 <= itemsToShow <= slidesCount.
• Update documentation to reflect this rule.

Priority

Medium – Improves stability and prevents misuse.