修复重置 loadingDelay 为 undefined 后，定时器没有被清理而导致 loading 始终为 true 的 bug

packages/hooks/src/useRequest/__tests__/useLoadingDelayPlugin.test.ts

@@ -1,7 +1,7 @@
 import { act, renderHook, waitFor } from '@testing-library/react';
 import type { RenderHookResult } from '@testing-library/react';
 import useRequest from '../index';
-import { request } from '../../utils/testingHelpers';
+import { request, sleep } from '../../utils/testingHelpers';
 
 describe('useLoadingDelayPlugin', () => {
   jest.useFakeTimers();
@@ -75,4 +75,30 @@ describe('useLoadingDelayPlugin', () => {
 
     await waitFor(() => expect(hook.result.current.loading).toBe(true));
   });
+
+  it.only('useLoadingDelayPlugin should update loading when loadingDelay is reset and refreshDeps is changed', async () => {
+    jest.useRealTimers();
+
+    let loadingDelay: number | null = 1500;
+
+    act(() => {
+      hook = setUp(request, {
+        loadingDelay,
+      });
+    });
+
+    expect(hook.result.current.loading).toBe(false);
+
+    loadingDelay = null;
+
+    hook.rerender({
+      loadingDelay,
+    });
+
+    await act(async () => {
+      await sleep(1600);
+    });
+
+    expect(hook.result.current.loading).toBe(false);
+  });
 });

packages/hooks/src/useRequest/src/plugins/useLoadingDelayPlugin.ts

@@ -4,16 +4,17 @@ import type { Plugin, Timeout } from '../types';
 const useLoadingDelayPlugin: Plugin<any, any[]> = (fetchInstance, { loadingDelay, ready }) => {
   const timerRef = useRef<Timeout>();
 
-  if (!loadingDelay) {
-    return {};
-  }
-
   const cancelTimeout = () => {
     if (timerRef.current) {
       clearTimeout(timerRef.current);
     }
   };
 
+  if (!loadingDelay) {
+    cancelTimeout();
+    return {};
+  }
+
   return {
     onBefore: () => {
       cancelTimeout();