Can CSS Transitions Preserve Text Rendering Consistency in WebKit?

How to Maintain Text Rendering Consistency During CSS Transitions in WebKit

In an environment where CSS transitions are employed to smoothly navigate between transformed states of elements, it has been observed that WebKit browsers exhibit a peculiar behavior. During these transitions, the remaining text content on the webpage undergoes a subtle but noticeable shift in its rendering, causing a perception of inconsistency.

Delving into this issue, it was determined that text elements with the -webkit-font-smoothing: antialiased property/value pair, such as headers, remained unaffected by this rendering alteration. Consequently, the question arises: can text elements with the default font-smoothing value (i.e., "auto") be protected from these unwanted rendering changes during transitions?

Initially, the straightforward approach of explicitly setting the font-smoothing property to "auto" was attempted, but it proved ineffective. Further experimentation revealed that setting font-smoothing to "none" also eliminated the unsightly rendering flicker during transitions.

A Potential Solution: Leverage Hardware Acceleration

After exploring various avenues, a promising solution emerged: utilizing -webkit-transform: translateZ(0px); on the parent element. This approach seems to rectify the issue by forcing hardware acceleration, ensuring consistent text rendering throughout the transition process.

Caution: Weigh the Impact

It is important to note that this hack, while effective, may come at the expense of font smoothing. Depending on the fonts, browser, and OS in use, text rendering quality may be compromised. Therefore, careful consideration should be given before implementing this solution.

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