feat: Add pageSize prop to render initial number of items in dropdown #498

[ParthSatasiya]

What does it do?

Added pageSize props which indicate how many elements will render initially on the dropdown. When the scroll is near the end of the list, it automatically renders the next group of elements in the dropdown.

Fixes #498

• For this Issue (https://github.com/dowjones/react-dropdown-tree-select/issues/498): need to provide pageSize={10000}. This will solve the problem of this issue

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [x] This change requires a documentation update

Checklist:

• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] Updated documentation (if applicable)
• [ ] Added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] My changes generate no new warnings

[github-actions[bot]]

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