Show HN: The text disappears when you screenshot it (unscreenshottable.vercel.app)

Article summary

The article appears to feature a text that disappears when a screenshot is taken, with the text only being visible when in motion. The exact mechanism behind this effect is not clear from the comments, but it seems to involve generating random noise patterns. The text is perceivable as long as the background stays fixed, but becomes obscured when the animation is frozen. The effect may not work on all browsers or devices.

Main themes

• Text disappearance effect
• Random noise patterns
• Browser compatibility
• Visual perception
• Screenshotting techniques

What commenters say

• The text disappearance effect is achieved by generating random noise patterns that are only perceivable when in motion.
• The effect may not work on all browsers or devices, with some users reporting that they can screenshot the text without issue.
• Zooming out or using a different browser can reveal the text, suggesting that the effect is not foolproof.
• The use of random noise patterns is not truly random in a cryptographic sense, but rather perceivably random to the human eye.
• The effect can be circumvented by using a camera to take a long exposure of the screen, potentially revealing the text.
• Some users have reported that the effect causes motion sickness or eye strain, while others have found it to be an interesting visual phenomenon.
• The exact mechanism behind the effect is unclear, with some users speculating that it involves aliasing or canvas drawing issues.
• The effect may be related to browser settings or configurations, such as canvas fingerprinting protection.