Diagonal Stripes Wipe Animation

This article explores recreating a diagonal screen wipe animation seen in the Apple Arcade game "wurdweb." The author initially attempts this using repeating-linear-gradient and CSS custom properties, achieving the effect but with limited browser support (Chromium-based browsers). The code cleverly manipulates the gradient's start value to create the wipe effect.

The core technique involves animating a custom property defining the gradient's starting point. The @property rule is crucial for making the length value animatable. JavaScript is used to dynamically change the background color mid-animation, showcasing the transition's potential use in screen changes. The author also highlights the use of CSS variables for easy customization of stripe angle, size, and animation speed.

However, a more broadly compatible alternative, suggested by Temani Afif, utilizes CSS masks. While potentially less performant, this method offers better browser support, making it a viable option, especially considering the short duration of a screen wipe animation where performance impact is less critical. The author concludes by noting that the animation's performance might not be a major concern given the typical lack of user interaction during screen transitions.

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