Fix FilterListItem story shows wrong way of resetting a filter

[fzaninotto]

Problem

The FilterListItem story features an example with an empy value using null`:

<FilterListItem
    label="21st"
    value={{ year_gte: 2000, year_lte: null }}
/>

This example doesn't work, as selecting the "21st" filter item doesn't mark it as active.

https://react-admin-storybook.vercel.app/?path=/story/ra-ui-materialui-list-filter-filterlist--full-app

Solution

The right syntax is to use undefined:

<FilterListItem
    label="21st"
    value={{ year_gte: 2000, year_lte: undefined }}
/>