CSS-Tricks: Latest Updates and Features in CSS

What’s !important #5: Lazy-loading iframes, Repeating corner-shape Backgrounds, and More

The latest issue of What’s !important highlights key CSS updates, including lazy-loading iframes and repeating corner-shape backgrounds. Dr. Milan Milanović’s research reveals that developers can only code for 52 minutes per day due to meetings and interruptions.

Why This Matters

The technical reality of CSS development is often at odds with ideal models, with meetings, emails, and interruptions significantly impacting developer productivity. For instance, Dr. Milan Milanović’s research shows that the average developer can only code for 52 minutes per day, resulting in decreased efficiency and increased costs. Understanding these limitations is crucial for effective CSS development and implementation.

Key Insights

• Chrome 145 introduces new features such as text-justify and overscroll-behavior, as reported by CSS-Tricks in 2026
• The CSS Selection 2026 edition focuses on CSS patterns and techniques, providing valuable insights for web developers, as noted by CSS-Tricks
• Temporal is used by companies like Stripe and Coinbase for workflow management, as mentioned in various developer forums

Working Examples

Lazy-loading iframe example

<iframe loading='lazy'></iframe>

Repeating corner-shape background example

corner-shape: circle 10px;

Practical Applications

• Company: Google, Behavior: Using Chrome 145’s new features to improve web development efficiency, Pitfall: Ignoring compatibility issues with older browsers, Consequence: Decreased user experience
• Company: Amazon, Behavior: Implementing lazy-loading iframes to reduce page load times, Pitfall: Not optimizing images, Consequence: Increased page load times

References:

• https://css-tricks.com/whats-important-5/