React Js File Upload size Limit Validation

<!DOCTYPE html>
<html>

<body>
    <div id="app"></div>
    <script type="text/babel">
        const { useState } = React;
        function App() {

const handleFileChange = (event) => {
                const file = event.target.files[0];

// File type validation
                if (!file.type.startsWith('image/')) {
                    alert('Please upload only image files.');
                    return;
                }

// File size validation (in bytes)
                const maxSize = 5 * 1024 ; 
                if (file.size > maxSize) {
                    alert('File size exceeds the limit (5 KB).');
                    return;
                }

};

return (
                <div className="container">
                    <h3 className="title">Image Upload Size Limit and File Type Restriction in React JS</h3>
                    <input type="file" onChange={handleFileChange} />
                   
                </div>

);
        }

ReactDOM.render(<App />, document.getElementById("app"));
    </script>

.container {
            margin: 0 auto;
            width: 600px;
            text-align: center;
            box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.12), 0 2px 4px 0 rgba(0, 0, 0, 0.24);
            padding: 20px;
        }

.title {
            font-size: 24px;
            color: #333;
            margin-bottom: 20px;
        }

.uploaded-text {
            font-size: 18px;
            color: #333;
            margin-top: 20px;
        }

.uploaded-image {
            max-width: 100%;
            height: auto;
            margin-top: 10px;
            border-radius: 5px;
            box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);
        }

.error {
            color: #ff0000;
            font-size: 14px;
            margin-top: 10px;
        }

.image-size {
            font-size: 16px;
            color: #777;
            margin-top: 10px;
        }
    </style>
</body>

</html>