[DO NOT MERGE] MaybeNativeDatePicker test branch

.changeset/odd-scissors-suffer.md

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+---
+"@khanacademy/wonder-blocks-date-picker": minor
+"@khanacademy/wb-dev-build-settings": minor
+---
+
+Add new Date Picker package and related dev settings

__docs__/wonder-blocks-date-picker/date-picker-input.stories.tsx

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+import {Temporal} from "temporal-polyfill";
+import * as React from "react";
+import {enUS} from "react-day-picker/locale";
+import type {CustomModifiers} from "@khanacademy/wonder-blocks-date-picker";
+
+import {View} from "@khanacademy/wonder-blocks-core";
+import {BodyText} from "@khanacademy/wonder-blocks-typography";
+
+import {
+    DatePickerInput,
+    TemporalLocaleUtils,
+} from "@khanacademy/wonder-blocks-date-picker";
+import ComponentInfo from "../components/component-info";
+import packageConfig from "../../packages/wonder-blocks-date-picker/package.json";
+
+type StoryArgs = React.ComponentProps<typeof DatePickerInput>;
+
+// A wrapper component that handles state management for the stories
+const DateInputWrapper = (props: StoryArgs) => {
+    const [isInvalid, setIsInvalid] = React.useState(false);
+    const [selectedDate, setSelectedDate] = React.useState<
+        Date | null | undefined
+    >(() => {
+        if (props.value && typeof props.value === "string") {
+            try {
+                const locale = enUS.code;
+                const parsed = TemporalLocaleUtils.parseDate(
+                    props.value,
+                    props.dateFormat,
+                    locale,
+                );
+                return parsed
+                    ? TemporalLocaleUtils.temporalDateToJsDate(parsed)
+                    : null;
+            } catch {
+                return null;
+            }
+        }
+        return null;
+    });
+
+    const handleChange = (
+        date: Date | null | undefined,
+        modifiers: Partial<CustomModifiers>,
+    ) => {
+        // We don't want to send back invalid dates.
+        if (!date || modifiers.disabled) {
+            setIsInvalid(true);
+            return;
+        }
+
+        setIsInvalid(false);
+        setSelectedDate(date);
+    };
+    const locale = navigator.language || "en";
+
+    const selectedDateAsValue = selectedDate
+        ? TemporalLocaleUtils.formatDate(
+              TemporalLocaleUtils.jsDateToTemporalDate(selectedDate),
+              props.dateFormat,
+              locale,
+          )
+        : props.value;
+
+    return (
+        <View>
+            <DatePickerInput
+                {...props}
+                onBlur={() => {
+                    setSelectedDate(selectedDate);
+                }}
+                onChange={handleChange}
+                value={selectedDateAsValue}
+            />
+            {isInvalid && <BodyText>Invalid date</BodyText>}
+        </View>
+    );
+};
+
+const minDate = Temporal.Now.plainDateISO();
+const maxDate = minDate.add({days: 10});
+
+export default {
+    title: "Packages / Date Picker / DatePickerInput",
+    component: DatePickerInput,
+    parameters: {
+        componentSubtitle: (
+            <ComponentInfo
+                name={packageConfig.name}
+                version={packageConfig.version}
+            />
+        ),
+    },
+};
+
+export const SelectedDateIsNow = {
+    args: {
+        disabled: false,
+        value: TemporalLocaleUtils.formatDate(
+            Temporal.Now.plainDateISO(),
+            "MMMM D, YYYY",
+            "en-US",
+        ),
+        dateFormat: "MMMM D, YYYY",
+        parseDate: TemporalLocaleUtils.parseDateToJsDate,
+        getModifiersForDay: TemporalLocaleUtils.getModifiersForDay,
+        modifiers: {
+            selected: TemporalLocaleUtils.temporalDateToJsDate(
+                Temporal.Now.plainDateISO(),
+            ),
+            // We want to disable past dates and dates after 10 days from now
+            disabled: (date: Date) => {
+                const temporalDate =
+                    TemporalLocaleUtils.jsDateToTemporalDate(date);
+
+                return (
+                    (minDate &&
+                        Temporal.PlainDate.compare(temporalDate, minDate) <
+                            0) ||
+                    (maxDate &&
+                        Temporal.PlainDate.compare(temporalDate, maxDate) > 0)
+                );
+            },
+        },
+    },
+    render: (args: StoryArgs) => <DateInputWrapper {...args} />,
+};
+
+export const DisabledState = {
+    args: {
+        disabled: true,
+        value: "May 7, 2021",
+        parseDate: TemporalLocaleUtils.parseDateToJsDate,
+        dateFormat: "MMMM D, YYYY",
+    },
+    chromatic: {
+        // Disabling because this is behavior is tested in TextField stories
+        disableSnapshot: true,
+    },
+    render: (args: StoryArgs) => <DateInputWrapper {...args} />,
+};
+
+export const InvalidDate = {
+    args: {
+        value: "May 7, 2024",
+        dateFormat: "MMMM D, YYYY",
+        parseDate: TemporalLocaleUtils.parseDateToJsDate,
+        getModifiersForDay: TemporalLocaleUtils.getModifiersForDay,
+        modifiers: {
+            selected: TemporalLocaleUtils.temporalDateToJsDate(
+                Temporal.Now.plainDateISO(),
+            ),
+            // We want to disable past dates and dates after 10 days from now
+            disabled: (date: Date) => {
+                const temporalDate =
+                    TemporalLocaleUtils.jsDateToTemporalDate(date);
+                return (
+                    (minDate &&
+                        Temporal.PlainDate.compare(temporalDate, minDate) <
+                            0) ||
+                    (maxDate &&
+                        Temporal.PlainDate.compare(temporalDate, maxDate) > 0)
+                );
+            },
+        },
+    },
+    render: (args: StoryArgs) => <DateInputWrapper {...args} />,
+};
+
+export const WithAriaLabel = {
+    args: {
+        "aria-label": "Choose a date",
+        value: "May 7, 2021",
+        dateFormat: "MMMM D, YYYY",
+    },
+    parameters: {
+        chromatic: {
+            // Disabling because this doesn't test anything visual.
+            disableSnapshot: true,
+        },
+    },
+    render: (args: StoryArgs) => <DatePickerInput {...args} />,
+};

__docs__/wonder-blocks-date-picker/date-picker.argtypes.tsx

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+import type {ArgTypes} from "@storybook/react-vite";
+
+export default {} satisfies ArgTypes;