react频繁使用的js(input防抖请求、节流)

react频繁使用的js(input防抖请求)

input的防抖请求

import React, { useState, useEffect, useCallback } from "react";
import { Input } from "antd";
import SearchDeptID from "styled-components";
import { debounce } from "lodash";
export default function SearchDept(props) {
  const [keyword, setKeyword] = useState("");

  // input使用防抖
  const keywordDebounce = useCallback(debounce((val)=>{
    console.log('val',val);
  }, 300),[])
  const inputChange = (event) => {
    const value = event.target.value;
    setKeyword(value);
    keywordDebounce(value);
  }

  return (
    <SearchDeptWrap>
      <Input
        placeholder="请输入"
        className="ipt"
        value={keyword}
        onChange={inputChange}
      />
    </SearchDeptWrap>
  );
}
const SearchDeptWrap = SearchDeptID.div`
`;
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

节流 提交的节流或者点击按钮等节流

节流 code

import { throttle } from 'lodash';
import React, { useCallback, useState } from 'react';

export default function App(props) {
  const [count, setCount] = useState(0);

  const throttleFunc = useCallback(
    throttle(() => {
      console.log('throttleFunc');
      setCount((prevCount) => prevCount + 1);
    }, 1000),
    []
  );

  const addCount = () => {
    console.log('addCount');
    throttleFunc();
  };

  return (
    <div className='content'>
      count-{count}
      <button onClick={addCount}>addCount</button>
    </div>
  );
}
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

节流 效果