Can use react-admin DateInput to change the format like dd/MM/yyyy to MM/dd/yyyy - react-admin

Question

The component
<DateInput
options={{ format: "MM/DD/YYYY", clearable: true }}
className="location-input" label="Purchase Date" source="PurchaseDate"
validate={validatePurchaseDate}
/>

Answer 1

From the doc, you can format the input/output of the component using the format and parse exposed method:
const dateFormatter = v => {
// v is a `Date` object
if (!(v instanceof Date) || isNaN(v)) return;
const pad = '00';
const yy = v.getFullYear().toString();
const mm = (v.getMonth() + 1).toString();
const dd = v.getDate().toString();
return `${yy}-${(pad + mm).slice(-2)}-${(pad + dd).slice(-2)}`;
};
const dateParser = v => {
// v is a string of "YYYY-MM-DD" format
const match = /(\d{4})-(\d{2})-(\d{2})/.exec(v);
if (match === null) return;
const d = new Date(match[1], parseInt(match[2], 10) - 1, match[3]);
if (isNaN(d)) return;
return d;
};
<DateInput source="isodate" format={dateFormatter} parse={dateParser} />
Reference: https://marmelab.com/react-admin/Inputs.html#transforming-input-value-tofrom-record

Answer 2

If this is the exact and only change you are after - you can use the locale setting with the follwoing values:
"en-US": MM/dd/yyyy
"en-GB": dd/MM/yyyy
It's kind of a hack but also a painless easy solution.