Date picker, complex tables, select — did you use any basic libraries or was everything custom-made?

In most projects, proven libraries are used for date pickers, complex tables, and select components to avoid reinventing the wheel and to ensure good UX/UI and cross-browser compatibility.

For example:

• Date picker: react-datepicker, flatpickr, or Material UI DatePicker.
• Tables: react-table, ag-Grid, or Ant Design Table.
• Select: react-select, or native select with customization.

If the requirements are very specific, custom components are sometimes created, but this requires more time and testing.

Using libraries speeds up development, ensures accessibility support, and is often already optimized for performance.