组件状态管理-useState
1.
function App(){
const [ count, setCount ] = React.useState(0)
return (
<div>
<button onClick={()=>setCount(count+1)}>{ count }</button>
</div>
)
}
1.
function App(){
const [ count, setCount ] = React.useState(0)
return (
<div>
<button onClick={()=>setCount(count+1)}>{ count }</button>
</div>
)
}