React实现Step组件的示例代码

import {useEffect, useState} from "react";
 
export const Step = ({name, data})=>{
    const submit = (event)=>{
        event.preventDefault();
       const local =  localStorage.getItem(name);
       console.log(JSON.parse(local))
    }
 
    const [current, setCurrent] = useState(0);
    useEffect(()=>{
        let paths = window.location.pathname.split('/');
        setCurrent(parseInt(paths[paths.length - 1]));
    }, [])
 
    return (
        <form className={'Step'} onSubmit={submit}>
            <div className={'Step-Header'}>
                <div>
                {
                    data.map((item, idx) =>{
                        return <a key={idx} href= {`/step/${idx}`} style={{paddingRight:30}}>{item.name + ((idx === current) ? '√':'')}</a>;
                    })
                }
                </div>
            </div>
            <div className={'Step-Content'}>
                {data[current].content}
            </div>
            <div className={'Step-Footer'}>
                {current > 0 && <button onClick={()=>setCurrent(current-1)}>pre</button>}
                {current + 1 < data.length && <button onClick={()=> setCurrent(current+1)}>next</button>}
                {current === data.length - 1 && <button type="submit">提交</button>}
            </div>
        </form>
 
    );
}

unction App() {
   const stepName = 'Demo';
   const Step1 = ()=>{
       const local = localStorage.getItem(stepName);
 
       const [username, setUsername] = useState(local ? local.username:'');
       const change = (event)=>{
           setUsername(event.target.value);
 
           localStorage.setItem(stepName, JSON.stringify({
               username: event.target.value
           }));
       }
 
       return <>
           <label htmlFor='username'>用戶名:</label><input type={'text'}  value={username} onChange={change}/>
       </>;
   }
   const steps = [
       {
           name: "步驟1",
           content: <Step1/>
       },
       {
           name: "步驟2",
           content: (<span>2号</span>)
       }
   ]
    return <Step  data={steps} name={stepName} />
}
 
export default App;