Other Looks at the Conditional Border Radius Trick

Recall Ahmad Shadeed's intriguing Facebook CSS border-radius "toggle"? I previously covered this clever technique. Subsequent articles offered deeper analysis.

Michelle Barker's "Evaluating Clever CSS Solutions" questions the wisdom of overly clever code:

While undeniably ingenious and fascinating, I concur with Robin Rendle's CSS-Tricks newsletter comment: "It feels a bit too clever."

This sentiment resonates. Such techniques have their place, perhaps within Facebook's resources. However, prioritizing readability (e.g., using media queries) over clever but potentially less maintainable solutions is generally preferable.

Stefan Judis explored achieving the same "conditional border-radius" effect using the upcoming container queries:

/* If the container's width is equal to or greater than 
   the viewport width, remove the border-radius */
@container (width >= 100vw) {
  .conditional-border-radius {
    border-radius: 0;
  }
}

This approach is significantly clearer. Stefan also suggests the potential benefits of a hypothetical @when feature:

@when container(width >= 100vw) {
  .conditional-border-radius {
    border-radius: 0;
  }
}
@else {
  .conditional-border-radius {
    border-radius: 1em;
  }
}

The feasibility of this @when integration remains uncertain. However, its inclusion would enhance CSS's readability and logical consistency.

A previous article briefly mentioned the role of multiplication in preventing intermediate values: the result is either 8px or 0px. To clarify this, a video demonstration is included below. (Note: A video would be inserted here in the actual publication.)

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