Tech Blog of Pinomaker
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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!--react cdn-->
    <script crossorigin src="https://unpkg.com/react@17/umd/react.production.min.js"></script>
    <script crossorigin src="https://unpkg.com/react-dom@17/umd/react-dom.production.min.js"></script>
    <!--babel cdn-->
    <script src="https://unpkg.com/@babel/standalone/babel.min.js"></script>
    <title>Document</title>
</head>
<body>
    <div id="root"></div>
    <script type="text/babel">
        //Btn Component, text와 fuce를 인자로 받음
        function Btn({text, func}) {
            return(
                //text를 func에 넣은 결과 값 출력
                <button style ={{border : 0, backgroundColor : "blue", color : "white", borderRadius : 20}}>{func(text)}</button>
            )
        }

        function App () {
            //App Component -> 해당 컴포넌트 빌드 예정
            //입력 Value 값 선언
            const [value, setValue] = React.useState("Upper And Lower")
            //대문자 변경 함수
            const toUpper = (value) => value.toUpperCase()
            //소문자 변경 함수
            const toLower = (value) => value.toLowerCase()
            
            return(
                <div>
                    <input type="text" onChange={(e)=>setValue(e.target.value)} />
                    <br />
                    UPPER : <Btn text = {value} func = {toUpper}/>
                    <br />
                    LOWER : <Btn text = {value}func = {toLower} />
                </div>
            )
        }
        //ReactDom을 이용하여, root Div에 App Render
        ReactDOM.render(
           <App />, document.getElementById("root")
        )

    </script>
</body>
</html>
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Tech Blog of Pinomaker

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