<body>
    <noscript>You need to enable JavaScript to run this app.</noscript>
    <div id="root"></div>
</body>
body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
        "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans",
        "Helvetica Neue", sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

code {
    font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
        monospace;
}

.App {
    text-align: center;
}

.App-logo {
    height: 40vmin;
    pointer-events: none;
}

@media (prefers-reduced-motion: no-preference) {
    .App-logo {
        animation: App-logo-spin infinite 20s linear;
    }
}

.App-header {
    background-color: #282c34;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-size: calc(10px + 2vmin);
    color: white;
}

.App-link {
    color: #61dafb;
}

@keyframes App-logo-spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

import React from "https://cdn.skypack.dev/react@17.0.1";
import ReactDOM from "https://cdn.skypack.dev/react-dom@17.0.1";

const logoSrc =
    "https://upload.wikimedia.org/wikipedia/commons/thumb/a/a7/React-icon.svg/1280px-React-icon.svg.png";

function App() {
    return (
        <div className="App">
            <header className="App-header">
                <img src={logoSrc} className="App-logo" alt="logo" />
                <p>
                    Edit <code>src/App.js</code>!
                </p>
                <a
                    className="App-link"
                    href="https://reactjs.org"
                    target="_blank"
                    rel="noopener noreferrer"
                >
                    Learn React
                </a>
            </header>
        </div>
    );
}

ReactDOM.render(<App />, document.getElementById("root"));
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External JavaScript

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