Syntax - Tasty Web Development Treats
Syntax - Tasty Web Development Treats

965: Baseline 2025 Features web gained in 2025

December 22, 2025

AI Summary

5 min read

🎙️ The Voices & The Context

  • The Format: This casual host-led discussion dives into the latest browser features standardized in Baseline 2025, blending live demos with enthusiastic breakdowns to highlight what's now reliably usable across all modern browsers. Technical and demo-driven.
  • The Format: Casual chat between hosts.
  • The Key Players:
  • Just Hosts: Scott Tolitzki (developer from Denver) and Wes Bos showcase electric chemistry through playful banter, shared demos, and rapid-fire excitement over web tech, bantering on everything from CSS "getting abs" to IE relics while demoing features live.

🗝️ Key Themes & Topics

The episode buzzes through 24 new APIs now in Baseline 2025, focusing on animation, CSS math, data handling, and performance boosts usable today without browser support worries.

  • Topic 1: Animation Superpowers (View Transitions, Starting Style, Allowed Discrete): Hosts geek out over same-document view transitions for tweening elements anywhere (not just pages), plus starting style and allowed discrete for animating DOM entry/exit like modals, drawers, and hamburger menus—now baseline or nearly so, enabling CSS-only magic without JavaScript hacks.
  • Topic 2: CSS Math & Utilities (abs(), calc expansions): New abs() function makes values always positive for complex animations and calcs; ties into gro

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What you'll learn

  • 1 `(00:00)` **Baseline 2025 Overview**
  • 2 `(01:37)` **Same-Document View Transitions**
  • 3 `(05:28)` **CSS `abs()` Function**
  • 4 `(09:23)` **JSON Modules**
  • 5 `(10:10)` **Popover API**
  • 6 `(13:07)` **Base64 to Uint8Array**
  • 7 `(16:10)` **Starting Styles & `@starting-style`**

+ Full timestamped outline available in the app

Show Notes

Scott and Wes break down the biggest web platform features that reached Baseline in 2025, separating the genuinely useful APIs from the niche and forgettable ones. From same-document view transitions and the Popover API to Promise.try, content-visibility, and modern CSS goodies, they share what’s actually ready to use today.

Show Notes

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