feat: 用RAF实现setTimeout

config/hooks.ts

@@ -71,6 +71,7 @@ export const menus = [
       'useInterval',
       'useRafInterval',
       'useTimeout',
+      'useRafTimeout',
       'useLockFn',
       'useUpdate',
     ],

packages/hooks/src/index.ts

@@ -71,6 +71,7 @@ import useWebSocket from './useWebSocket';
 import useWhyDidYouUpdate from './useWhyDidYouUpdate';
 import { createUpdateEffect } from './createUpdateEffect';
 import useRafInterval from './useRafInterval';
+import useRafTimeout from './useRafTimeout';
 
 export {
   useRequest,
@@ -148,4 +149,5 @@ export {
   useFocusWithin,
   createUpdateEffect,
   useRafInterval,
+  useRafTimeout,
 };

packages/hooks/src/useRafInterval/index.en-US.md

@@ -11,7 +11,7 @@ Please note that the following two cases are likely to be inapplicable, and `use
 - the time interval is less than `16ms`
 - want to execute the timer when page is not rendering;
 
-> `requestAnimationFrame` will automatically downgrade to `setInterval` in node enviraonment
+> `requestAnimationFrame` will automatically downgrade to `setInterval` in node environment
 
 ## Examples
 

packages/hooks/src/useRafTimeout/__tests__/index.test.ts

@@ -0,0 +1,39 @@
+import { renderHook } from '@testing-library/react-hooks';
+import useRafTimeout from '../index';
+
+interface ParamsObj {
+  fn: (...arg: any) => any;
+  delay: number | undefined;
+}
+
+const setUp = ({ fn, delay }: ParamsObj) => renderHook(() => useRafTimeout(fn, delay));
+
+const FRAME_TIME = 16.7;
+describe('useRafTimeout', () => {
+  beforeAll(() => {
+    jest.useFakeTimers('modern');
+  });
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+  it('should be defined', () => {
+    expect(useRafTimeout).toBeDefined();
+  });
+
+  it('timeout should work', () => {
+    const callback = jest.fn();
+    setUp({ fn: callback, delay: FRAME_TIME });
+    expect(callback).not.toBeCalled();
+    jest.advanceTimersByTime(FRAME_TIME * 2.5);
+    expect(callback).toHaveBeenCalledTimes(1);
+  });
+
+  it('timeout should stop when delay is undefined', () => {
+    const delay: number | undefined = undefined;
+    const callback = jest.fn();
+    setUp({ fn: callback, delay });
+    expect(callback).not.toBeCalled();
+    jest.advanceTimersByTime(FRAME_TIME * 1.5);
+    expect(callback).not.toBeCalled();
+  });
+});

packages/hooks/src/useRafTimeout/__tests__/node.ts

@@ -0,0 +1,37 @@
+import { renderHook } from '@testing-library/react-hooks';
+import useRafTimeout from '../index';
+
+interface ParamsObj {
+  fn: (...arg: any) => any;
+  delay: number | undefined;
+}
+
+const setUp = ({ fn, delay }: ParamsObj) => renderHook(() => useRafTimeout(fn, delay));
+
+const FRAME_TIME = 16.7;
+describe('useRafTimeout', () => {
+  beforeAll(() => {
+    jest.useFakeTimers('modern');
+  });
+  afterAll(() => {
+    jest.restoreAllMocks();
+  });
+  it('should downgrade to setTimeout when requstAnimationFrame is undefined', () => {
+    const _requestAnimationFrame = global.requestAnimationFrame;
+    const _cancelAnimationFrame = global.cancelAnimationFrame;
+
+    // @ts-ignore
+    delete global.requestAnimationFrame;
+    // @ts-ignore
+    delete global.cancelAnimationFrame;
+
+    const callback = jest.fn();
+    setUp({ fn: callback, delay: FRAME_TIME });
+    expect(callback).not.toBeCalled();
+    jest.advanceTimersByTime(FRAME_TIME * 1.5);
+    expect(callback).toHaveBeenCalledTimes(1);
+
+    global.requestAnimationFrame = _requestAnimationFrame;
+    global.cancelAnimationFrame = _cancelAnimationFrame;
+  });
+});

packages/hooks/src/useRafTimeout/demo/demo1.tsx

@@ -0,0 +1,20 @@
+/**
+ * title: Basic usage
+ * desc: Execute after 2000ms.
+ *
+ * title.zh-CN: 基础用法
+ * desc.zh-CN: 在 2000ms 后执行。
+ */
+
+import React, { useState } from 'react';
+import { useRafTimeout } from 'ahooks';
+
+export default () => {
+  const [count, setCount] = useState(0);
+
+  useRafTimeout(() => {
+    setCount(count + 1);
+  }, 2000);
+
+  return <div>count: {count}</div>;
+};

packages/hooks/src/useRafTimeout/demo/demo2.tsx

@@ -0,0 +1,44 @@
+/**
+ * title: Advanced usage
+ * desc: Modify the delay to realize the timer timeout change and pause.
+ *
+ * title.zh-CN: 进阶使用
+ * desc.zh-CN: 动态修改 delay 以实现定时器间隔变化与暂停。
+ */
+
+import React, { useState } from 'react';
+import { useRafTimeout } from 'ahooks';
+
+export default () => {
+  const [count, setCount] = useState(0);
+  const [delay, setDelay] = useState<number | undefined>(1000);
+
+  useRafTimeout(() => {
+    setCount(count + 1);
+  }, delay);
+
+  return (
+    <div>
+      <p> count: {count} </p>
+      <p style={{ marginTop: 16 }}> Delay: {delay} </p>
+      <button onClick={() => setDelay((t) => (!!t ? t + 1000 : 1000))} style={{ marginRight: 8 }}>
+        Delay + 1000
+      </button>
+      <button
+        style={{ marginRight: 8 }}
+        onClick={() => {
+          setDelay(1000);
+        }}
+      >
+        reset Delay
+      </button>
+      <button
+        onClick={() => {
+          setDelay(undefined);
+        }}
+      >
+        clear
+      </button>
+    </div>
+  );
+};

packages/hooks/src/useRafTimeout/index.en-US.md

@@ -0,0 +1,36 @@
+---
+nav:
+  path: /hooks
+---
+
+# useRafTimeout
+
+A hook implements with `requestAnimationFrame` for better performance. The API is consistent with `useTimeout`.
+
+> `requestAnimationFrame` will automatically downgrade to `setTimeout` in node environment
+
+## Examples
+
+### Default usage
+
+<code src="./demo/demo1.tsx" />
+
+### Advanced usage
+
+<code src="./demo/demo2.tsx" />
+
+## API
+
+```typescript
+useRafTimeout(
+  fn: () => void, 
+  delay?: number | undefined, 
+);
+```
+
+### Params
+
+| Property | Description                                                                                                                                                   | Type                    |
+|----------|---------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------|
+| fn       | The function to be executed every `delay` milliseconds.                                                                                                       | `() => void`            |
+| delay    | The time in milliseconds, the timer should delay in between executions of the specified function. The timer will be cancelled if delay is set to `undefined`. | `number` \| `undefined` |

packages/hooks/src/useRafTimeout/index.ts

@@ -0,0 +1,59 @@
+import { useEffect } from 'react';
+import useLatest from '../useLatest';
+
+interface Handle {
+  id: number | NodeJS.Timeout;
+}
+
+const setRafTimeout = function (callback: () => void, delay: number = 16.7): Handle {
+  if (typeof requestAnimationFrame === typeof undefined) {
+    return {
+      id: setTimeout(callback, delay),
+    };
+  }
+  const handle: Handle = {
+    id: 0,
+  };
+
+  const now = Date.now;
+  let startTime = now();
+  let endTime = startTime;
+
+  const loop = () => {
+    handle.id = requestAnimationFrame(loop);
+    endTime = now();
+    if (endTime - startTime >= delay) {
+      callback();
+      clearRafTimeout(handle);
+    }
+  };
+  handle.id = requestAnimationFrame(loop);
+  return handle;
+};
+
+function cancelAnimationFrameIsNotDefined(t: any): t is NodeJS.Timer {
+  return typeof cancelAnimationFrame === typeof undefined;
+}
+
+const clearRafTimeout = function (handle: Handle) {
+  if (cancelAnimationFrameIsNotDefined(handle.id)) {
+    return clearTimeout(handle.id);
+  }
+  cancelAnimationFrame(handle.id);
+};
+
+function useRafTimeout(fn: () => void, delay: number | undefined) {
+  const fnRef = useLatest(fn);
+
+  useEffect(() => {
+    if (typeof delay !== 'number' || delay < 0) return;
+    const timer = setRafTimeout(() => {
+      fnRef.current();
+    }, delay);
+    return () => {
+      clearRafTimeout(timer);
+    };
+  }, [delay]);
+}
+
+export default useRafTimeout;

packages/hooks/src/useRafTimeout/index.zh-CN.md

@@ -0,0 +1,36 @@
+---
+nav:
+  path: /hooks
+---
+
+# useRafTimeout
+
+用 `requestAnimationFrame` 模拟实现 `setTimeout`，API 和 `useTimeout` 保持一致
+
+> Node 环境下 `requestAnimationFrame` 会自动降级到 `setTimeout`
+
+## 代码演示
+
+### 基础用法
+
+<code src="./demo/demo1.tsx" />
+
+### 进阶使用
+
+<code src="./demo/demo2.tsx" />
+
+## API
+
+```typescript
+useRafTimeout(
+  fn: () => void, 
+  delay?: number | undefined, 
+);
+```
+
+### Params
+
+| 参数    | 说明                                        | 类型                    |
+|---------|---------------------------------------------|-------------------------|
+| fn      | 要定时调用的函数                            | `() => void`            |
+| delay   | 间隔时间，当取值 `undefined` 时会停止计时器 | `number` \| `undefined` |