ahook中常用的一些hooks
官方文档：https://ahooks.js.org/zh-CN/
以下总结一些个人认为非常实用的hook：
持续更新中：
1. useRequest 请求
import {useRequest } from 'ahooks';
const getSome = async () => {};
const { data, loading, run } = useRequest(getSome, {
debounceInterval: 500,
manual: true,
refreshDeps: [], // manual为false，可以按被动式触发
});
<div>
提交结果：{JSON.stringify(data)}
</div>
<Button loading={loading} onClick={run}>
提交
</Button>
2.useDynamicList 动态表单
import { useDynamicList } from 'ahooks';
const { list, remove, getKey, push } = useDynamicList(['David', 'Jack']);
const { getFieldDecorator, validateFields } = props.form;
<Form>
{
list.map((item, index) => {
<Form.Item key={getKey(index)}>
{getFieldDecorator(`names[${getKey(index)}]`, {
initialValue: item,
rules: [{ required: true }],
})(<Input />)}
{list.length > 1 && <Icon type="minus-circle-o" onClick={() => remove(index)} />}
<Icon type="plus-circle-o" onClick={() => push('')} />
</Form.Item>
})
}
</Form>
<Button onClick={() => {
const res = props.form.getFieldsValue().names;
console.log((res || []).filter(item => item))
}}>
提交
</Button>
3.useVirtualList 虚拟滚动
import { useVirtualList } from 'ahooks';
const { list, containerProps, wrapperProps } = useVirtualList(Array.from(Array(99999).keys()), {
overscan: 30, // 视区上、下额外展示的 dom 节点数量
itemHeight: 60, // 行高度，静态高度可以直接写入像素值，动态高度可传入函数
});
<div {...containerProps}>
<div {...wrapperProps}>
{ list.map(item => <div key={item.index}>{item.data}</div>) }
</div>
</div>
4.useDebounceFn 防抖
import { useDebounceFn } from 'ahooks';
const { run } = useDebounceFn(
() => console.log('test'),
{ wait: 500 },
);
<div>
<Button onClick={run}>
Click fast!
</Button>
</div>
5.useThrottleFn 节流
import { useThrottleFn } from 'ahooks';
const { run } = useThrottleFn(
() => console.log('test'),
{ wait: 500 },
);
<div>
<Button onClick={run}>
Click fast!
</Button>
</div>
6.useInterval 定时器
import { useInterval } from 'ahooks';
const [count, setCount] = useState(0);
useInterval(() => {
setCount(count + 1);
}, 1000);
<div>count: {count}</div>;
7.useUrlState state 往 url query 带上
import useUrlState from '@ahooksjs/use-url-state'; const [state, setState] = useUrlState( { page: '1', pageSize: '10' }, ); <button onClick={() => { setState((s) => ({ page: Number(s.page) + 1 })); }} > 翻页 </button>
8.useCookieState state 存放到 cookie，下次回来还能
import { useCookieState } from 'ahooks';
const [message, setMessage] = useCookieState('cookie-key');
<input
value={message}
onChange={(e) => setMessage(e.target.value)}
/>
9.useLocalStorageState state 存放到 localStorage
import { useLocalStorageState } from 'ahooks';
const [message, setMessage] = useLocalStorageState('store-key', 'default value');
<input
value={message || ''}
onChange={(e) => setMessage(e.target.value)}
/>
10.在function comp上使用和class comp一样的setState语法
import { useSetState } from 'ahooks';
const [state, setState] = useSetState<State>({
hello: '',
count: 0,
});
<Button onClick={() => setState({ hello: 'world' })}>
只改变state.hello，不影响state.count
</Button>
11.useWhyDidYouUpdate 调试判断什么参数导致组件update
import { useWhyDidYouUpdate } from 'ahooks';
const [randomNum, setRandomNum] = useState(Math.random());
// 当组件更新时，会在console打印出来哪个发生变动，导致组件update
useWhyDidYouUpdate('useWhyDidYouUpdateComponent', { ...props, randomNum });
12. 判断页面是否在可见状态
import { useDocumentVisibility } from 'ahooks';
const documentVisibility = useDocumentVisibility();
useEffect(() => {
if (documentVisibility === 'visible') {
console.log('当前页面在可见状态');
} else {
console.log('当前页面不在可见状态');
}
}, [documentVisibility]);
13.判断dom是否在可视区
import { useInViewport } from 'ahooks';
const ref = useRef();
const inViewPort = useInViewport(ref);
<div ref={ref}>
{inViewPort ? 'div在可视区' : 'div不在可视区'}
</div>
14.js响应式窗口宽度判断
import { configResponsive, useResponsive } from 'ahooks';
configResponsive({
small: 0,
middle: 800,
large: 1200,
});
const responsive = useResponsive();
// responsive ---> {small: true, middle: true, large: false}
15.判断dom宽高变化
import { useSize } from 'ahooks';
const ref = useRef();
const size = useSize(ref);
<div ref={ref}>
try to resize the preview window <br />
dimensions -- width: {size.width} px, height: {size.height} px
</div>
16.获取选中的文案
import { useTextSelection } from 'ahooks';
const ref = useRef();
const selection = useTextSelection(ref);
<div ref={ref}>
<p>Please swipe your mouse to select any text on this paragraph.</p>
</div>
17.代替useMemo、useRef的钩子
因为useMemo不能保证一定不会被重新计算
useRef如果针对复杂对象，每次渲染都创建一次会很耗性能
import { useCreation } from 'ahooks';
const foo = useCreation(() => {number: Math.random()}, []);
18.事件订阅
import { useEventEmitter } from 'ahooks';
// 事件队列
const focus$ = useEventEmitter<number>();
// 发送
focus$.emit(123);
// 订阅
focus$.useSubscription(value => {
console.log(value);
});
19.锁定异步函数
import { useLockFn } from 'ahooks';
const submit = useLockFn(async () => {
await requestSome();
});
<button onClick={submit}>Submit</button>
20.响应式修改state
import { useReactive } from 'ahooks';
const state = useReactive({
count: 0,
inputVal: '',
obj: {
value: '',
},
});
<p> state.count：{state.count}</p>
<button onClick={() => state.count++}>
state.count++
</button>
21.useSafeState,使用安全状态挂钩以防止在未安装的组件上设置状态，以防止在未安装的组件上设置状态时发生的内存泄漏
import { useSafeState} from 'ahooks';
const [state,setState] = useSafeState(0);
<p> state.count：{state.count}</p>
<button onClick={() => setState(state=>state++)}>
state
</button>
