new react-openapi

react-openapi/src/components/fields/renderers/DateField.tsx

@@ -12,16 +12,20 @@ interface Props {
 export function DateField({ field, value, onChange, error }: Props) {
   const inputType = field.format === "date" ? "date" : "datetime-local";
 
+  const normalized = field.format === "date-time" && typeof value === "string"
+    ? value.replace(/\.\d+Z$/, "").replace(/Z$/, "")
+    : value;
+
   return (
     <TextField
       fullWidth
       label={field.label}
       type={inputType}
-      value={value ?? ""}
+      value={normalized ?? ""}
       onChange={(e) => onChange(e.target.value)}
       error={!!error}
-      helperText={error ?? field.description}
-      placeholder={field.description}
+      helperText={error || field.description || undefined}
+      placeholder={field.description || undefined}
       size="small"
       disabled={field.readOnly}
       InputLabelProps={{ shrink: true }}