Created
August 16, 2020 12:56
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ExemploGrupoReactFb
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| import React, { useState, useRef } from "react"; | |
| export default () => { | |
| const [state, setState] = useState({ | |
| animate: false, | |
| inputValue: "", | |
| inputActive: false | |
| }); | |
| const inputRef = useRef(null); | |
| const onClickBtn = () => { | |
| setState((prevState) => ({ | |
| ...prevState, | |
| inputActive: true, | |
| animate: !prevState.animate, | |
| inputValue: "" | |
| })); | |
| inputRef.current.focus(); | |
| }; | |
| return ( | |
| <div> | |
| <button onClick={onClickBtn}>Click</button> | |
| <input | |
| onChange={({ target }) => | |
| setState((prevState) => ({ ...prevState, inputValue: target.value })) | |
| } | |
| value={state.inputValue} | |
| className={`${state.inputActive ? "active" : ""} ${ | |
| state.animate ? "animate" : "" | |
| }`} | |
| ref={inputRef} | |
| placeholder="input" | |
| /> | |
| </div> | |
| ); | |
| }; |
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