Created
May 2, 2025 12:47
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FinalizationRegistry Bug Reproduction
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>FinalizationRegistry Bug Reproduction</title> | |
| </head> | |
| <body> | |
| <p>Live Objects: <span id="liveCounter">0</span></p> | |
| <p>Created Objects: <span id="createdCounter">0</span></p> | |
| <p>Collected Objects: <span id="collectedCounter">0</span></p> | |
| <script> | |
| let liveObjects = 0 | |
| let createdObjects = 0 | |
| let collectedObjects = 0 | |
| const liveCounter = document.getElementById('liveCounter') | |
| const createdCounter = document.getElementById('createdCounter') | |
| const collectedCounter = document.getElementById('collectedCounter') | |
| const registry = new FinalizationRegistry(() => { | |
| liveObjects-- | |
| collectedObjects++ | |
| }) | |
| class TrackableObject { | |
| constructor(id) { | |
| this.id = id | |
| this.data = new Uint8Array(5_000) | |
| } | |
| } | |
| function createObject() { | |
| for (let i = 0; i < 20000; i++) { | |
| registry.register(new TrackableObject(i)) | |
| createdObjects++ | |
| liveObjects++ | |
| } | |
| } | |
| setInterval(createObject, 1000 / 60) | |
| function updateCounters() { | |
| liveCounter.textContent = liveObjects | |
| createdCounter.textContent = createdObjects | |
| collectedCounter.textContent = collectedObjects | |
| requestAnimationFrame(updateCounters) | |
| } | |
| requestAnimationFrame(updateCounters) | |
| setTimeout(() => { | |
| if (collectedObjects > 0) { | |
| window.location.reload() | |
| } | |
| }, 3000) | |
| </script> | |
| </body> | |
| </html> |
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