Weekly Platform News: Event Timing, Google Earth for Web, undead session cookies

Šime regularly shares developer-focused content on webplatform.news. This week's highlights include Wikipedia's use of Event Timing to pinpoint slow click handlers, the web debut of Google Earth, enhanced CSS support for SVG properties, and best practices for handling persistent session cookies.

Optimizing Event Handlers with Event Timing

Chrome's experimental Event Timing API (available via Origin Trial) aids in identifying slow event handlers. Wikipedia's participation in the trial revealed three frequently occurring slow click handlers, primarily due to JavaScript-induced style recalculations and layout issues.

(via Gilles Dubuc)

Google Earth Arrives on the Web

A beta version of Google Earth, leveraging WebAssembly, is now accessible in Chromium-based browsers and Firefox. While it functions single-threaded in browsers without fully enabled SharedArrayBuffer, Safari's limited WebGL2 support currently prevents its use.

(via Jordon Mears)

Expanded CSS Support for SVG Geometry

Firefox Nightly now supports SVG geometry properties (like x, y, and r) within CSS. This functionality is already present in Chrome and Safari, with expected inclusion in Firefox 69 (September release).

(via Jérémie Patonnier)

Managing Persistent Session Cookies

Chrome and Firefox's session restoration feature maintains session cookies and sessionStorage data even after browser closure. This necessitates careful handling of potentially outdated session cookies to prevent unexpected behavior; redirecting users to login pages instead of displaying errors is recommended.

(via Eric Lawrence)

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