App.jsx
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import React, { useCallback, useState } from "react"; import { useDropzone } from "react-dropzone"; function FileUpload() { const [files, setFiles] = useState([]); const [error, setError] = useState(""); const onDrop = useCallback((acceptedFiles, rejectedFiles) => { setError(""); // Reset error // Handle rejected files if (rejectedFiles.length > 0) { const errorMessages = rejectedFiles .map((file) => file.errors.map( (err) => `File "${file.file.name}" is too large or of invalid type.` ) ) .flat() .join(" "); setError(errorMessages); } else { setFiles(acceptedFiles); // Update files if valid } }, []); const { getRootProps, getInputProps, isDragActive } = useDropzone({ onDrop, accept: ".jpg,.jpeg,.png,.pdf,.docx,.txt", maxSize: 5000000, }); const generatePreview = (file) => { if (file.type.startsWith("image/")) { return URL.createObjectURL(file); } return null; }; const removeFile = (index) => { setFiles(files.filter((_, i) => i !== index)); }; return ( <div> <div {...getRootProps()}> <input {...getInputProps()} /> <p> {isDragActive ? "Drop the files here..." : "Drag and drop files here, or click to select files"} </p> </div> {error && <div>{error}</div>} {files.length > 0 && ( <div> <h3>Uploaded Files:</h3> <ul> {files.map((file, index) => ( <li key={index}> {file.type.startsWith("image/") && ( <img src={generatePreview(file)} alt={file.name} style={{ maxWidth: "100px", maxHeight: "100px" }} /> )} <p> {file.name} - {Math.round(file.size / 1024)} KB </p> <button onClick={() => removeFile(index)}>Remove</button> </li> ))} </ul> </div> )} </div> ); } export default FileUpload; |
