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Add file upload functionality #2

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Initial plan
Copilot Nov 28, 2025
79f44a2
Add file upload functionality with drag-and-drop support
Copilot Nov 28, 2025
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14 changes: 14 additions & 0 deletions README.md
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# base44-zip
base 44 app

## File Upload Feature

This application provides a simple file upload interface with the following features:

- **Drag and Drop**: Drag files directly onto the upload area
- **Click to Browse**: Click the upload area to open a file browser
- **Multiple Files**: Upload multiple files at once
- **File Preview**: See file names and sizes before uploading
- **Remove Files**: Remove files from the queue before uploading

### Usage

Open `index.html` in a web browser to use the file upload interface.
313 changes: 313 additions & 0 deletions index.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Base44 - File Upload</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}

body {
font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
min-height: 100vh;
display: flex;
align-items: center;
justify-content: center;
padding: 20px;
}

.container {
background: white;
border-radius: 16px;
box-shadow: 0 20px 60px rgba(0, 0, 0, 0.2);
padding: 40px;
max-width: 500px;
width: 100%;
}

h1 {
color: #333;
margin-bottom: 8px;
font-size: 28px;
}

.subtitle {
color: #666;
margin-bottom: 30px;
}

.upload-area {
border: 2px dashed #ccc;
border-radius: 12px;
padding: 40px 20px;
text-align: center;
cursor: pointer;
transition: all 0.3s ease;
margin-bottom: 20px;
}

.upload-area:hover {
border-color: #667eea;
background: #f8f9ff;
}

.upload-area.dragover {
border-color: #667eea;
background: #f0f2ff;
}

.upload-icon {
font-size: 48px;
margin-bottom: 16px;
}

.upload-text {
color: #666;
margin-bottom: 8px;
}

.upload-hint {
color: #999;
font-size: 14px;
}

#fileInput {
display: none;
}

.file-list {
margin-top: 20px;
}

.file-item {
display: flex;
align-items: center;
padding: 12px;
background: #f8f9fa;
border-radius: 8px;
margin-bottom: 10px;
}

.file-icon {
font-size: 24px;
margin-right: 12px;
}

.file-info {
flex: 1;
}

.file-name {
color: #333;
font-weight: 500;
}

.file-size {
color: #999;
font-size: 13px;
}

.file-remove {
background: #ff4757;
color: white;
border: none;
border-radius: 6px;
padding: 6px 12px;
cursor: pointer;
font-size: 13px;
}

.file-remove:hover {
background: #ff3344;
}

.upload-btn {
width: 100%;
padding: 14px;
background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
color: white;
border: none;
border-radius: 8px;
font-size: 16px;
font-weight: 600;
cursor: pointer;
margin-top: 20px;
transition: transform 0.2s ease;
}

.upload-btn:hover {
transform: translateY(-2px);
}

.upload-btn:disabled {
opacity: 0.6;
cursor: not-allowed;
transform: none;
}

.message {
margin-top: 15px;
padding: 12px;
border-radius: 8px;
text-align: center;
display: none;
}

.message.success {
display: block;
background: #d4edda;
color: #155724;
}

.message.error {
display: block;
background: #f8d7da;
color: #721c24;
}
</style>
</head>
<body>
<div class="container">
<h1><span aria-hidden="true">📁</span> File Upload</h1>
<p class="subtitle">Upload your files easily</p>

<div class="upload-area" id="uploadArea">
<div class="upload-icon" aria-hidden="true">☁️</div>
<p class="upload-text">Drag and drop files here</p>
<p class="upload-hint">or click to browse</p>
</div>

<input type="file" id="fileInput" multiple>

<div class="file-list" id="fileList"></div>

<button class="upload-btn" id="uploadBtn" disabled>Upload Files</button>

<div class="message" id="message"></div>
</div>

<script>
const uploadArea = document.getElementById('uploadArea');
const fileInput = document.getElementById('fileInput');
const fileList = document.getElementById('fileList');
const uploadBtn = document.getElementById('uploadBtn');
const message = document.getElementById('message');

let selectedFiles = [];
let dragCounter = 0;

// Click to open file dialog
uploadArea.addEventListener('click', () => {
fileInput.click();
});

// Handle file selection
fileInput.addEventListener('change', (e) => {
handleFiles(e.target.files);
});

// Drag and drop handlers
uploadArea.addEventListener('dragenter', (e) => {
e.preventDefault();
dragCounter++;
uploadArea.classList.add('dragover');
});

uploadArea.addEventListener('dragover', (e) => {
e.preventDefault();
});

uploadArea.addEventListener('dragleave', (e) => {
e.preventDefault();
dragCounter--;
if (dragCounter === 0) {
uploadArea.classList.remove('dragover');
}
});

uploadArea.addEventListener('drop', (e) => {
e.preventDefault();
dragCounter = 0;
uploadArea.classList.remove('dragover');
handleFiles(e.dataTransfer.files);
});

function handleFiles(files) {
for (let file of files) {
if (!selectedFiles.some(f => f.name === file.name && f.size === file.size && f.lastModified === file.lastModified)) {
selectedFiles.push(file);
}
}
renderFileList();
updateUploadButton();
}

function renderFileList() {
fileList.innerHTML = '';
selectedFiles.forEach((file, index) => {
const fileItem = document.createElement('div');
fileItem.className = 'file-item';
fileItem.innerHTML = `
<span class="file-icon" aria-hidden="true">📄</span>
<div class="file-info">
<div class="file-name">${escapeHtml(file.name)}</div>
<div class="file-size">${formatFileSize(file.size)}</div>
</div>
<button class="file-remove" data-index="${index}">Remove</button>
`;
fileList.appendChild(fileItem);
});

// Add remove handlers
document.querySelectorAll('.file-remove').forEach(btn => {
btn.addEventListener('click', (e) => {
const index = parseInt(e.target.getAttribute('data-index'));
selectedFiles.splice(index, 1);
renderFileList();
updateUploadButton();
});
});
}

function updateUploadButton() {
uploadBtn.disabled = selectedFiles.length === 0;
}

function formatFileSize(bytes) {
if (bytes === 0) return '0 Bytes';
const k = 1024;
const sizes = ['Bytes', 'KB', 'MB', 'GB'];
const i = Math.floor(Math.log(bytes) / Math.log(k));
return parseFloat((bytes / Math.pow(k, i)).toFixed(2)) + ' ' + sizes[i];
}

function escapeHtml(text) {
const div = document.createElement('div');
div.textContent = text;
return div.innerHTML;
}

// Handle upload button click
uploadBtn.addEventListener('click', () => {
if (selectedFiles.length === 0) return;

// Show success message (in a real app, this would upload to a server)
showMessage('success', `${selectedFiles.length} file(s) ready for upload!`);

// In a real implementation, you would send files to a server here
// For now, we just show a success message
console.log('Files to upload:', selectedFiles);
});

function showMessage(type, text) {
message.className = `message ${type}`;
message.textContent = text;
}
</script>
</body>
</html>