add hw2

node_modules/jotai/esm/react.mjs

@@ -0,0 +1,171 @@
+'use client';
+import React, { createContext, useContext, useRef, createElement, useReducer, useEffect, useDebugValue, useCallback } from 'react';
+import { getDefaultStore, createStore } from 'jotai/vanilla';
+import { INTERNAL_registerAbortHandler } from 'jotai/vanilla/internals';
+
+const StoreContext = createContext(
+  void 0
+);
+function useStore(options) {
+  const store = useContext(StoreContext);
+  return (options == null ? void 0 : options.store) || store || getDefaultStore();
+}
+function Provider({
+  children,
+  store
+}) {
+  const storeRef = useRef(void 0);
+  if (!store && !storeRef.current) {
+    storeRef.current = createStore();
+  }
+  return createElement(
+    StoreContext.Provider,
+    {
+      value: store || storeRef.current
+    },
+    children
+  );
+}
+
+const isPromiseLike = (x) => typeof (x == null ? void 0 : x.then) === "function";
+const attachPromiseStatus = (promise) => {
+  if (!promise.status) {
+    promise.status = "pending";
+    promise.then(
+      (v) => {
+        promise.status = "fulfilled";
+        promise.value = v;
+      },
+      (e) => {
+        promise.status = "rejected";
+        promise.reason = e;
+      }
+    );
+  }
+};
+const use = React.use || // A shim for older React versions
+((promise) => {
+  if (promise.status === "pending") {
+    throw promise;
+  } else if (promise.status === "fulfilled") {
+    return promise.value;
+  } else if (promise.status === "rejected") {
+    throw promise.reason;
+  } else {
+    attachPromiseStatus(promise);
+    throw promise;
+  }
+});
+const continuablePromiseMap = /* @__PURE__ */ new WeakMap();
+const createContinuablePromise = (promise, getValue) => {
+  let continuablePromise = continuablePromiseMap.get(promise);
+  if (!continuablePromise) {
+    continuablePromise = new Promise((resolve, reject) => {
+      let curr = promise;
+      const onFulfilled = (me) => (v) => {
+        if (curr === me) {
+          resolve(v);
+        }
+      };
+      const onRejected = (me) => (e) => {
+        if (curr === me) {
+          reject(e);
+        }
+      };
+      const onAbort = () => {
+        try {
+          const nextValue = getValue();
+          if (isPromiseLike(nextValue)) {
+            continuablePromiseMap.set(nextValue, continuablePromise);
+            curr = nextValue;
+            nextValue.then(onFulfilled(nextValue), onRejected(nextValue));
+            INTERNAL_registerAbortHandler(nextValue, onAbort);
+          } else {
+            resolve(nextValue);
+          }
+        } catch (e) {
+          reject(e);
+        }
+      };
+      promise.then(onFulfilled(promise), onRejected(promise));
+      INTERNAL_registerAbortHandler(promise, onAbort);
+    });
+    continuablePromiseMap.set(promise, continuablePromise);
+  }
+  return continuablePromise;
+};
+function useAtomValue(atom, options) {
+  const { delay, unstable_promiseStatus: promiseStatus = !React.use } = options || {};
+  const store = useStore(options);
+  const [[valueFromReducer, storeFromReducer, atomFromReducer], rerender] = useReducer(
+    (prev) => {
+      const nextValue = store.get(atom);
+      if (Object.is(prev[0], nextValue) && prev[1] === store && prev[2] === atom) {
+        return prev;
+      }
+      return [nextValue, store, atom];
+    },
+    void 0,
+    () => [store.get(atom), store, atom]
+  );
+  let value = valueFromReducer;
+  if (storeFromReducer !== store || atomFromReducer !== atom) {
+    rerender();
+    value = store.get(atom);
+  }
+  useEffect(() => {
+    const unsub = store.sub(atom, () => {
+      if (promiseStatus) {
+        try {
+          const value2 = store.get(atom);
+          if (isPromiseLike(value2)) {
+            attachPromiseStatus(
+              createContinuablePromise(value2, () => store.get(atom))
+            );
+          }
+        } catch (e) {
+        }
+      }
+      if (typeof delay === "number") {
+        setTimeout(rerender, delay);
+        return;
+      }
+      rerender();
+    });
+    rerender();
+    return unsub;
+  }, [store, atom, delay, promiseStatus]);
+  useDebugValue(value);
+  if (isPromiseLike(value)) {
+    const promise = createContinuablePromise(value, () => store.get(atom));
+    if (promiseStatus) {
+      attachPromiseStatus(promise);
+    }
+    return use(promise);
+  }
+  return value;
+}
+
+function useSetAtom(atom, options) {
+  const store = useStore(options);
+  const setAtom = useCallback(
+    (...args) => {
+      if ((import.meta.env ? import.meta.env.MODE : void 0) !== "production" && !("write" in atom)) {
+        throw new Error("not writable atom");
+      }
+      return store.set(atom, ...args);
+    },
+    [store, atom]
+  );
+  return setAtom;
+}
+
+function useAtom(atom, options) {
+  return [
+    useAtomValue(atom, options),
+    // We do wrong type assertion here, which results in throwing an error.
+    useSetAtom(atom, options)
+  ];
+}
+
+export { Provider, useAtom, useAtomValue, useSetAtom, useStore };