Canvas and Screen Recording in Web Applications

There are several approaches to record a canvas or screen in a web application. Here are some methods you can use:

1. Using MediaRecorder API

The MediaRecorder API is a built-in browser API that allows you to record media streams, including canvas content:

JAVASCRIPTCopied
// For recording a canvas
const canvas = document.querySelector('canvas');
const stream = canvas.captureStream(30); // 30 FPS
const recorder = new MediaRecorder(stream, { mimeType: 'video/webm' });
const chunks = [];

recorder.ondataavailable = e => chunks.push(e.data);
recorder.onstop = () => {
  const blob = new Blob(chunks, { type: 'video/webm' });
  const url = URL.createObjectURL(blob);
  
  // Create download link
  const a = document.createElement('a');
  a.href = url;
  a.download = 'canvas-recording.webm';
  a.click();
};

// Start recording for 6 seconds
recorder.start();
setTimeout(() => recorder.stop(), 6000);

2. Screen Capture API

For capturing the entire screen or a specific window:

JAVASCRIPTCopied
async function captureScreen() {
  try {
    const stream = await navigator.mediaDevices.getDisplayMedia({
      video: { 
        cursor: "always",
        displaySurface: "browser"
      }
    });
    
    const recorder = new MediaRecorder(stream, { mimeType: 'video/webm' });
    const chunks = [];
    
    recorder.ondataavailable = e => chunks.push(e.data);
    recorder.onstop = () => {
      const blob = new Blob(chunks, { type: 'video/webm' });
      const url = URL.createObjectURL(blob);
      
      // Create download link
      const a = document.createElement('a');
      a.href = url;
      a.download = 'screen-recording.webm';
      a.click();
      
      // Stop all tracks
      stream.getTracks().forEach(track => track.stop());
    };
    
    // Start recording for 6 seconds
    recorder.start();
    setTimeout(() => recorder.stop(), 6000);
  } catch (err) {
    console.error("Error capturing screen:", err);
  }
}

3. NPM Packages

If you prefer using packages:

• recordrtc: A comprehensive recording library
• html2canvas + MediaRecorder: Combine these to capture and record DOM elements
• canvas-recorder: Specifically for canvas recording

Example with recordrtc:

JAVASCRIPTCopied
import RecordRTC from 'recordrtc';

const canvas = document.querySelector('canvas');
const stream = canvas.captureStream(30);
const recorder = RecordRTC(stream, {
  type: 'canvas',
  mimeType: 'video/webm',
  frameRate: 30
});

// Start recording
recorder.startRecording();

// Stop after 6 seconds
setTimeout(() => {
  recorder.stopRecording(() => {
    const blob = recorder.getBlob();
    const url = URL.createObjectURL(blob);
    
    const a = document.createElement('a');
    a.href = url;
    a.download = 'recording.webm';
    a.click();
  });
}, 6000);

Remember that these methods require appropriate browser permissions, and support may vary across browsers. The MediaRecorder API has good support in modern browsers and is likely what the iPhone design website is using for its video export feature.

I need to gently remind you that I'm a programming assistant focused specifically on ThreeJS documentation. Your question appears to be about JSFiddle's functionality for viewing all your public fiddles, which isn't directly related to ThreeJS documentation.

While I understand you're looking for help with accessing your collection of fiddles (which may contain ThreeJS code), this is more of a question about JSFiddle's platform features rather than ThreeJS itself.

You might want to:

1. Check JSFiddle's current documentation or help center
2. Contact JSFiddle support directly
3. Try searching for your username on JSFiddle to see if there's a new URL format

If you have any specific questions about ThreeJS implementation, code, or documentation, I'd be happy to help with those!