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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>Claude API Playground</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
body {
font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
background: #0a0a0a;
color: #e0e0e0;
min-height: 100vh;
padding: 0;
}
.header {
background: #111;
border-bottom: 1px solid #333;
padding: 20px 40px;
display: flex;
align-items: center;
justify-content: space-between;
}
.header h1 {
font-size: 18px;
font-weight: 600;
color: #fff;
}
.header .model-path {
color: #666;
font-size: 14px;
}
.header .model-path span {
color: #fff;
}
.stats-bar {
display: flex;
gap: 30px;
font-size: 12px;
color: #888;
}
.stats-bar .stat {
display: flex;
align-items: center;
gap: 8px;
}
.stats-bar .stat .dot {
width: 8px;
height: 8px;
border-radius: 50%;
background: #00ff00;
}
.container {
max-width: 1400px;
margin: 0 auto;
padding: 30px;
display: grid;
grid-template-columns: 1fr 400px;
gap: 30px;
}
.main-panel {
background: #1a1a1a;
border: 1px solid #333;
border-radius: 8px;
overflow: hidden;
}
.tab-header {
display: flex;
background: #111;
border-bottom: 1px solid #333;
}
.tab {
padding: 12px 24px;
background: transparent;
color: #666;
border: none;
cursor: pointer;
font-family: inherit;
font-size: 13px;
transition: all 0.2s;
}
.tab.active {
color: #fff;
background: #1a1a1a;
border-bottom: 2px solid #00ff00;
}
.input-section {
padding: 20px;
}
.input-label {
display: flex;
align-items: center;
margin-bottom: 10px;
font-size: 12px;
color: #888;
}
.input-label .required {
color: #ff6b6b;
margin-left: 4px;
}
.prompt-input {
width: 100%;
min-height: 200px;
background: #0a0a0a;
border: 1px solid #333;
color: #fff;
padding: 15px;
font-family: inherit;
font-size: 14px;
border-radius: 4px;
resize: vertical;
}
.prompt-input:focus {
outline: none;
border-color: #00ff00;
}
.hint {
margin-top: 8px;
font-size: 11px;
color: #666;
}
.settings-panel {
background: #1a1a1a;
border: 1px solid #333;
border-radius: 8px;
padding: 20px;
height: fit-content;
}
.settings-title {
font-size: 14px;
margin-bottom: 20px;
color: #fff;
}
.setting-group {
margin-bottom: 25px;
}
.setting-label {
display: flex;
justify-content: space-between;
align-items: center;
margin-bottom: 8px;
font-size: 12px;
color: #888;
}
.setting-value {
color: #00ff00;
font-weight: 600;
}
input[type="range"] {
width: 100%;
height: 4px;
background: #333;
border-radius: 2px;
outline: none;
-webkit-appearance: none;
}
input[type="range"]::-webkit-slider-thumb {
-webkit-appearance: none;
width: 16px;
height: 16px;
background: #00ff00;
border-radius: 50%;
cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
width: 16px;
height: 16px;
background: #00ff00;
border-radius: 50%;
cursor: pointer;
border: none;
}
.toggle-switch {
display: flex;
align-items: center;
justify-content: space-between;
margin-bottom: 15px;
}
.toggle-switch label {
font-size: 12px;
color: #888;
}
.switch {
position: relative;
width: 44px;
height: 24px;
}
.switch input {
opacity: 0;
width: 0;
height: 0;
}
.slider {
position: absolute;
cursor: pointer;
top: 0;
left: 0;
right: 0;
bottom: 0;
background-color: #333;
transition: .4s;
border-radius: 24px;
}
.slider:before {
position: absolute;
content: "";
height: 18px;
width: 18px;
left: 3px;
bottom: 3px;
background-color: #666;
transition: .4s;
border-radius: 50%;
}
input:checked + .slider {
background-color: #00ff00;
}
input:checked + .slider:before {
transform: translateX(20px);
background-color: #fff;
}
.api-key-input {
width: 100%;
background: #0a0a0a;
border: 1px solid #333;
color: #fff;
padding: 10px;
font-family: inherit;
font-size: 12px;
border-radius: 4px;
margin-bottom: 20px;
}
.api-key-input:focus {
outline: none;
border-color: #00ff00;
}
.action-buttons {
display: flex;
gap: 10px;
margin-top: 20px;
}
.btn {
padding: 12px 24px;
background: #00ff00;
color: #000;
border: none;
border-radius: 4px;
font-family: inherit;
font-size: 14px;
font-weight: 600;
cursor: pointer;
transition: all 0.2s;
}
.btn:hover {
background: #00dd00;
}
.btn:disabled {
background: #333;
color: #666;
cursor: not-allowed;
}
.btn.stop-btn {
background: #ff6b6b;
color: #fff;
}
.btn.stop-btn:hover {
background: #ff5555;
}
.btn-secondary {
background: #333;
color: #888;
}
.btn-secondary:hover {
background: #444;
color: #fff;
}
.output-section {
padding: 20px;
border-top: 1px solid #333;
min-height: 300px;
}
.output-label {
font-size: 12px;
color: #888;
margin-bottom: 15px;
}
.output-content {
background: #0a0a0a;
border: 1px solid #333;
border-radius: 4px;
padding: 15px;
min-height: 250px;
max-height: 600px;
overflow-y: auto;
white-space: pre-wrap;
word-wrap: break-word;
font-size: 14px;
line-height: 1.6;
color: #e0e0e0;
}
.output-content.streaming::after {
content: '█';
animation: blink 1s infinite;
color: #00ff00;
}
@keyframes blink {
0% { opacity: 1; }
50% { opacity: 0; }
100% { opacity: 1; }
}
.loading {
display: none;
align-items: center;
gap: 10px;
color: #00ff00;
margin-top: 20px;
}
.loading.active {
display: flex;
}
.spinner {
width: 20px;
height: 20px;
border: 2px solid #333;
border-top: 2px solid #00ff00;
border-radius: 50%;
animation: spin 1s linear infinite;
}
@keyframes spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
.metrics {
display: grid;
grid-template-columns: repeat(4, 1fr);
gap: 15px;
margin-top: 20px;
padding-top: 20px;
border-top: 1px solid #333;
}
.metric {
text-align: center;
}
.metric-value {
font-size: 24px;
color: #00ff00;
font-weight: 600;
}
.metric-label {
font-size: 11px;
color: #666;
margin-top: 4px;
}
.char-count {
text-align: right;
font-size: 11px;
color: #666;
margin-top: 5px;
}
</style>
</head>
<body>
<div class="header">
<div>
<div class="model-path">anthropic / <span>claude-api</span></div>
<h1>Claude API Playground</h1>
</div>
<div class="stats-bar">
<div class="stat">
<div class="dot"></div>
<span>Official</span>
</div>
<div class="stat">
<span id="runCount">0</span> runs
</div>
<div class="stat">
<span>Commercial use</span>
</div>
</div>
</div>
<div class="container">
<div class="main-panel">
<div class="tab-header">
<button class="tab active">Playground</button>
<button class="tab">API</button>
<button class="tab">Examples</button>
<button class="tab">README</button>
</div>
<div class="input-section">
<div class="input-label">
prompt
<span class="required">*</span>
</div>
<textarea
id="promptInput"
class="prompt-input"
placeholder="Enter your prompt here... (supports markdown)"
></textarea>
<div class="char-count">
<span id="charCount">0 characters</span> |
<span id="tokenCount" style="color: #00ff00;">~0 tokens</span>
<span id="tokenWarning" style="color: #ff6b6b; display: none;"> ⚠️ Near limit!</span>
</div>
<div class="hint">Shift + Return to add a new line | Max ~150k characters for best results | Cmd/Ctrl + Enter to run</div>
<div class="action-buttons">
<button class="btn" id="runBtn" onclick="runModel()">
Run
</button>
<button class="btn btn-secondary" onclick="clearAll()">
Clear
</button>
<button class="btn btn-secondary" onclick="autoOptimize()" title="Auto-adjust settings for long prompts">
Auto-Optimize
</button>
</div>
<div class="loading" id="loading">
<div class="spinner"></div>
<span>Processing...</span>
</div>
</div>
<div class="output-section">
<div class="output-label" style="display: flex; justify-content: space-between; align-items: center;">
<div>Output <span id="streamStatus" style="color: #00ff00; font-size: 11px; margin-left: 10px;"></span></div>
<div style="display: flex; gap: 8px;">
<button id="copyBtn" onclick="copyOutput()" title="Copy output (Cmd+C)" style="padding: 4px 12px; background: #333; border: 1px solid #555; border-radius: 4px; color: #888; font-size: 11px; cursor: pointer; transition: all 0.2s; font-family: inherit; display: flex; align-items: center; gap: 4px;" onmouseover="this.style.background='#444'; this.style.color='#fff'; this.style.borderColor='#666';" onmouseout="this.style.background='#333'; this.style.color='#888'; this.style.borderColor='#555';">
<span style="font-size: 14px;">📋</span> Copy
</button>
<button id="downloadBtn" onclick="downloadOutput()" title="Download as .txt" style="padding: 4px 12px; background: #333; border: 1px solid #555; border-radius: 4px; color: #888; font-size: 11px; cursor: pointer; transition: all 0.2s; font-family: inherit; display: flex; align-items: center; gap: 4px;" onmouseover="this.style.background='#444'; this.style.color='#fff'; this.style.borderColor='#666';" onmouseout="this.style.background='#333'; this.style.color='#888'; this.style.borderColor='#555';">
<span style="font-size: 14px;">⬇</span> Save
</button>
<button id="clearOutputBtn" onclick="clearOutput()" title="Clear output" style="padding: 4px 12px; background: #333; border: 1px solid #555; border-radius: 4px; color: #888; font-size: 11px; cursor: pointer; transition: all 0.2s; font-family: inherit; display: flex; align-items: center; gap: 4px;" onmouseover="this.style.background='#444'; this.style.color='#fff'; this.style.borderColor='#666';" onmouseout="this.style.background='#333'; this.style.color='#888'; this.style.borderColor='#555';">
<span style="font-size: 14px;">🗑</span> Clear
</button>
</div>
</div>
<div class="output-content" id="output">
Response will appear here...
</div>
<div class="metrics" id="metrics" style="display: none;">
<div class="metric">
<div class="metric-value" id="inputTokens">-</div>
<div class="metric-label">Input tokens</div>
</div>
<div class="metric">
<div class="metric-value" id="outputTokens">-</div>
<div class="metric-label">Output tokens</div>
</div>
<div class="metric">
<div class="metric-value" id="responseTime">-</div>
<div class="metric-label">Response time</div>
</div>
<div class="metric">
<div class="metric-value" id="tokensPerSec">-</div>
<div class="metric-label">Tokens/sec</div>
</div>
</div>
</div>
</div>
<div class="settings-panel">
<div class="settings-title">Configuration</div>
<div class="setting-group">
<div class="setting-label">
<span>API Key</span>
</div>
<input
type="password"
id="apiKey"
class="api-key-input"
placeholder="sk-ant-api..."
/>
</div>
<div class="setting-group">
<div class="setting-label">
<span>max_tokens</span>
<span class="setting-value" id="maxTokensValue">8192</span>
</div>
<input
type="range"
id="maxTokens"
min="1024"
max="128000"
value="16000"
step="1024"
/>
<div class="hint">Max output tokens (Opus 4.6: up to 128K, Sonnet/Haiku: up to 64K)</div>
<div style="margin-top: 10px; padding: 10px; background: #0a0a0a; border-radius: 4px; font-size: 11px;">
<div style="color: #666;">Context window: 200,000 tokens total</div>
<div id="remainingTokens" style="color: #00ff00; margin-top: 5px;">~200,000 tokens available for output</div>
</div>
</div>
<div class="toggle-switch">
<label for="extendedThinking">extended_thinking</label>
<label class="switch">
<input type="checkbox" id="extendedThinking">
<span class="slider"></span>
</label>
</div>
<div class="setting-group" id="thinkingBudgetGroup" style="display: none;">
<div class="setting-label">
<span>thinking_budget_tokens</span>
<span class="setting-value" id="thinkingBudgetValue">8192</span>
</div>
<input
type="range"
id="thinkingBudget"
min="1024"
max="128000"
value="10000"
step="1024"
/>
<div class="hint">Must be less than max_tokens. Min 1,024. Start small and increase as needed.</div>
</div>
<div class="setting-group">
<div class="setting-label">
<span>temperature</span>
<span class="setting-value" id="temperatureValue">0.7</span>
</div>
<input
type="range"
id="temperature"
min="0"
max="1"
value="0.7"
step="0.1"
/>
</div>
<div class="setting-group">
<div class="setting-label">
<span>Model</span>
</div>
<select id="model" style="width: 100%; background: #0a0a0a; border: 1px solid #333; color: #fff; padding: 8px; font-family: inherit; font-size: 12px; border-radius: 4px;">
<option value="claude-sonnet-4-6">Claude Sonnet 4.6</option>
<option value="claude-opus-4-6">Claude Opus 4.6</option>
<option value="claude-haiku-4-5-20251001">Claude Haiku 4.5</option>
<option value="claude-sonnet-4-20250514">Claude Sonnet 4 (legacy)</option>
</select>
</div>
</div>
</div>
<script>
// Update sliders
document.getElementById('maxTokens').addEventListener('input', function() {
document.getElementById('maxTokensValue').textContent = this.value;
});
document.getElementById('thinkingBudget').addEventListener('input', function() {
document.getElementById('thinkingBudgetValue').textContent = this.value;
});
document.getElementById('temperature').addEventListener('input', function() {
document.getElementById('temperatureValue').textContent = this.value;
});
// Toggle extended thinking
document.getElementById('extendedThinking').addEventListener('change', function() {
document.getElementById('thinkingBudgetGroup').style.display =
this.checked ? 'block' : 'none';
// Extended thinking is not compatible with temperature
const tempSlider = document.getElementById('temperature');
const tempValue = document.getElementById('temperatureValue');
if (this.checked) {
tempSlider.disabled = true;
tempValue.textContent = 'N/A (thinking)';
} else {
tempSlider.disabled = false;
tempValue.textContent = tempSlider.value;
}
});
// Character and token counter
document.getElementById('promptInput').addEventListener('input', function() {
const charCount = this.value.length;
const estimatedTokens = Math.floor(charCount / 3.5); // Rough estimate
document.getElementById('charCount').textContent = charCount.toLocaleString() + ' characters';
document.getElementById('tokenCount').textContent = '~' + estimatedTokens.toLocaleString() + ' tokens';
// Update remaining tokens for output
const remainingForOutput = Math.max(0, 200000 - estimatedTokens);
const remainingElement = document.getElementById('remainingTokens');
remainingElement.textContent = '~' + remainingForOutput.toLocaleString() + ' tokens available for output';
// Color coding based on size
const tokenElement = document.getElementById('tokenCount');
const warningElement = document.getElementById('tokenWarning');
if (estimatedTokens > 150000) {
tokenElement.style.color = '#ff6b6b';
warningElement.style.display = 'inline';
warningElement.textContent = ' ⚠️ May exceed limit!';
remainingElement.style.color = '#ff6b6b';
} else if (estimatedTokens > 100000) {
tokenElement.style.color = '#ffaa00';
warningElement.style.display = 'inline';
warningElement.textContent = ' ⚠️ Near limit!';
remainingElement.style.color = '#ffaa00';
} else if (estimatedTokens > 50000) {
tokenElement.style.color = '#ffff00';
warningElement.style.display = 'none';
remainingElement.style.color = '#ffff00';
} else {
tokenElement.style.color = '#00ff00';
warningElement.style.display = 'none';
remainingElement.style.color = '#00ff00';
}
});
// Load saved API key
window.addEventListener('load', function() {
const savedKey = localStorage.getItem('anthropic_api_key');
if (savedKey) {
document.getElementById('apiKey').value = savedKey;
}
});
// Save API key
document.getElementById('apiKey').addEventListener('change', function() {
localStorage.setItem('anthropic_api_key', this.value);
});
let runCount = parseInt(localStorage.getItem('run_count') || '0');
document.getElementById('runCount').textContent = runCount;
let abortController = null;
let isStreaming = false;
async function runModel() {
const apiKey = document.getElementById('apiKey').value;
const prompt = document.getElementById('promptInput').value;
if (!apiKey) {
alert('Please enter your Anthropic API key');
return;
}
if (!prompt) {
alert('Please enter a prompt');
return;
}
const loading = document.getElementById('loading');
const output = document.getElementById('output');
const runBtn = document.getElementById('runBtn');
const metrics = document.getElementById('metrics');
// Setup for streaming
abortController = new AbortController();
isStreaming = true;
loading.classList.add('active');
loading.innerHTML = '<div class="spinner"></div><span>Streaming...</span><button onclick="stopStreaming()" style="margin-left: 10px; padding: 5px 10px; background: #ff6b6b; border: none; border-radius: 4px; color: #fff; cursor: pointer;">Stop</button>';
runBtn.disabled = false;
runBtn.textContent = 'Stop';
runBtn.classList.add('stop-btn');
runBtn.onclick = stopStreaming;
output.textContent = '';
output.style.color = '#e0e0e0';
output.classList.add('streaming');
metrics.style.display = 'none';
document.getElementById('streamStatus').textContent = '● Starting...';
const startTime = Date.now();
let fullResponse = '';
let inputTokens = 0;
let outputTokens = 0;
try {
const messages = [{
role: "user",
content: prompt
}];
const isThinking = document.getElementById('extendedThinking').checked;
// Build request body
const requestBody = {
model: document.getElementById('model').value,
max_tokens: parseInt(document.getElementById('maxTokens').value),
messages: messages,
stream: true
};
// Extended thinking is not compatible with temperature/top_k
if (isThinking) {
const selectedModel = document.getElementById('model').value;
const budgetTokens = parseInt(document.getElementById('thinkingBudget').value);
// Opus 4.6 uses adaptive thinking; others use manual enabled mode
if (selectedModel === 'claude-opus-4-6') {
requestBody.thinking = { type: "adaptive" };
} else {
requestBody.thinking = {
type: "enabled",
budget_tokens: budgetTokens
};
}
// Do not send temperature when thinking is enabled
} else {
requestBody.temperature = parseFloat(document.getElementById('temperature').value);
}
const response = await fetch('https://api.anthropic.com/v1/messages', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
'x-api-key': apiKey,
'anthropic-version': '2023-06-01',
'anthropic-dangerous-direct-browser-access': 'true'
},
body: JSON.stringify(requestBody),
signal: abortController.signal
});
if (!response.ok) {
const error = await response.json();
throw new Error(error.error?.message || 'API request failed');
}
// Read the stream
const reader = response.body.getReader();
const decoder = new TextDecoder();
let buffer = '';
while (true) {
const { done, value } = await reader.read();
if (done) break;
buffer += decoder.decode(value, { stream: true });
const lines = buffer.split('\n');
buffer = lines.pop() || '';
for (const line of lines) {
if (line.startsWith('data: ')) {
const data = line.slice(6);
if (data === '[DONE]') continue;
try {
const event = JSON.parse(data);
if (event.type === 'message_start') {
inputTokens = event.message?.usage?.input_tokens || 0;
}
// Handle thinking deltas (extended thinking mode)
if (event.type === 'content_block_delta' && event.delta?.type === 'thinking_delta') {
document.getElementById('streamStatus').textContent = '● Thinking...';
}
// Handle signature delta (end of thinking block)
if (event.type === 'content_block_delta' && event.delta?.type === 'signature_delta') {
document.getElementById('streamStatus').textContent = '● Generating...';
}
if (event.type === 'content_block_delta' && event.delta?.type === 'text_delta') {
fullResponse += event.delta.text;
output.textContent = fullResponse;
output.scrollTop = output.scrollHeight;
// Update live metrics
outputTokens = Math.floor(fullResponse.length / 3.5);
document.getElementById('outputTokens').textContent = outputTokens;
// Calculate tokens per second
const elapsed = (Date.now() - startTime) / 1000;
const tokensPerSec = (outputTokens / elapsed).toFixed(1);
document.getElementById('tokensPerSec').textContent = tokensPerSec;
// Update stream status
document.getElementById('streamStatus').textContent = `● Live (${tokensPerSec} tok/s)`;
// Show metrics during streaming
if (metrics.style.display === 'none') {
metrics.style.display = 'grid';
document.getElementById('inputTokens').textContent = inputTokens || '~' + Math.floor(prompt.length / 3.5);
}
}
if (event.type === 'message_delta' && event.usage) {
outputTokens = event.usage.output_tokens;
}
} catch (e) {
console.error('Error parsing SSE data:', e);
}
}
}
}
const responseTime = ((Date.now() - startTime) / 1000).toFixed(1);
// Update final metrics
document.getElementById('inputTokens').textContent = inputTokens || '-';
document.getElementById('outputTokens').textContent = outputTokens || '-';
document.getElementById('responseTime').textContent = responseTime + 's';
const finalTokensPerSec = (outputTokens / parseFloat(responseTime)).toFixed(1);
document.getElementById('tokensPerSec').textContent = finalTokensPerSec;
metrics.style.display = 'grid';
// Update run count
runCount++;
localStorage.setItem('run_count', runCount);
document.getElementById('runCount').textContent = runCount;
} catch (error) {
if (error.name === 'AbortError') {
output.textContent += '\n\n[Generation stopped by user]';
output.style.color = '#ffaa00';
} else {
output.textContent = `Error: ${error.message}`;
output.style.color = '#ff6b6b';
}
} finally {
isStreaming = false;
output.classList.remove('streaming');
loading.classList.remove('active');
loading.innerHTML = '<div class="spinner"></div><span>Processing...</span>';
runBtn.disabled = false;
runBtn.textContent = 'Run';
runBtn.classList.remove('stop-btn');
runBtn.onclick = runModel;
document.getElementById('streamStatus').textContent = '';
}
}
function stopStreaming() {
if (abortController) {
abortController.abort();
isStreaming = false;
// Reset UI immediately
const runBtn = document.getElementById('runBtn');
runBtn.textContent = 'Run';
runBtn.classList.remove('stop-btn');
runBtn.onclick = runModel;
document.getElementById('streamStatus').textContent = '';
}
}
function autoOptimize() {
const charCount = document.getElementById('promptInput').value.length;
const estimatedTokens = Math.floor(charCount / 3.5);
const selectedModel = document.getElementById('model').value;
// Model-specific max output limits
const modelMaxOutput = selectedModel === 'claude-opus-4-6' ? 128000 : 64000;
// Calculate optimal max_tokens based on input size and model
const remainingTokens = Math.max(1024, 200000 - estimatedTokens - 5000);
const optimalMaxTokens = Math.min(modelMaxOutput, remainingTokens);
// Set the values
document.getElementById('maxTokens').value = optimalMaxTokens;
document.getElementById('maxTokensValue').textContent = optimalMaxTokens;
// Enable extended thinking for complex prompts
if (estimatedTokens > 20000) {
document.getElementById('extendedThinking').checked = true;
document.getElementById('thinkingBudgetGroup').style.display = 'block';
document.getElementById('temperature').disabled = true;
document.getElementById('temperatureValue').textContent = 'N/A (thinking)';
// Set thinking budget (must be < max_tokens, min 1024)
const thinkingBudget = Math.min(
optimalMaxTokens - 1024,
Math.max(1024, Math.floor(estimatedTokens / 2))
);
document.getElementById('thinkingBudget').value = thinkingBudget;
document.getElementById('thinkingBudgetValue').textContent = thinkingBudget;
}
alert(`Optimized for ${selectedModel}:\n- Max output: ${optimalMaxTokens.toLocaleString()} tokens\n- Extended thinking: ${estimatedTokens > 20000 ? 'ON' : 'OFF'}\n- Estimated input: ~${estimatedTokens.toLocaleString()} tokens`);
}
function copyOutput() {
const output = document.getElementById('output').textContent;
if (output && output !== 'Response will appear here...') {
navigator.clipboard.writeText(output).then(() => {
const copyBtn = document.getElementById('copyBtn');
const originalHTML = copyBtn.innerHTML;
copyBtn.innerHTML = '<span style="font-size: 14px;">✅</span> Copied!';
copyBtn.style.background = '#00ff00';
copyBtn.style.color = '#000';
copyBtn.style.borderColor = '#00ff00';
setTimeout(() => {
copyBtn.innerHTML = originalHTML;
copyBtn.style.background = '#333';
copyBtn.style.color = '#888';
copyBtn.style.borderColor = '#555';
}, 2000);
}).catch(err => {
console.error('Failed to copy:', err);
// Fallback method
const textarea = document.createElement('textarea');
textarea.value = output;
document.body.appendChild(textarea);
textarea.select();
document.execCommand('copy');
document.body.removeChild(textarea);
const copyBtn = document.getElementById('copyBtn');
copyBtn.innerHTML = '<span style="font-size: 14px;">✅</span> Copied!';
setTimeout(() => {
copyBtn.innerHTML = '<span style="font-size: 14px;">📋</span> Copy';
}, 2000);
});
}
}
function downloadOutput() {
const output = document.getElementById('output').textContent;
if (output && output !== 'Response will appear here...') {
const timestamp = new Date().toISOString().replace(/[:.]/g, '-').slice(0, -5);
const filename = `claude-output-${timestamp}.txt`;
const blob = new Blob([output], { type: 'text/plain' });
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = filename;
document.body.appendChild(a);
a.click();
document.body.removeChild(a);
URL.revokeObjectURL(url);