February 2026 saw several web platform features reach Baseline milestones, meaning they are now supported across all major browser engines. New features include the CSS shape() function for defining complex clip paths using standard CSS syntax, the Trusted Types API for preventing DOM-based XSS attacks, JavaScript Map methods getOrInsert() and getOrInsertComputed() for ergonomic key-value handling, and Zstandard (zstd) as a new HTTP Content-Encoding option. Additionally, the dirname HTML attribute became Baseline Widely available, helping multilingual form handling. The post also notes the launch of Interop 2026, an initiative to improve cross-browser feature interoperability.
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