Revision 409: Style Containment und Display Lock API

from Working Draft · host Vanessa Otto, Peter Kröner, Hans Christian Reinl, Stefan Baumgartner, Christian »Schepp« Schaefer

Episode metadata supplied by the publisher feed · Published Jan 21, 2020

What this episode covers

Leise rendert der Schnee bei dieser in der Vorweihnachtszeit aufgenommenen Revision … und damit er das auch halbwegs zügig macht, sprechen Schepp und Peter über zwei Features, die Webentwicklern bessere Kontrolle über das Browser-Rendering geben. UNSER SPONSOR ABOUT YOU ist eines der am schnellsten wachsenden E-Commerce-Unternehmen in Europa mit Hauptsitz in Hamburg. Derzeit ist der Fashion Online Shop in zehn europäischen Märkten vertreten. Die Plattform verarbeitet täglich mehr als 300 Millionen API-Aufrufe und hat insgesamt 15 Millionen aktive Nutzer. Da das Unternehmen weiterhin schnell wächst, ist ABOUT YOU immer auf der Suche nach neuen, motivierten Talenten. Derzeit sind z.B. Full Stack Developer, Frontend Developer, Dart / Flutter Developer, Quality Assurance Engineer, Project Manager und andere aufregende Führungspositionen frei. Hört sich spannend an? Bewirb Dich jetzt unter aboutyou.com/bewerben. SCHAUNOTIZEN [00:01:40] CSS CONTAINMENT CSS Containment ist mittlerweile ein solider Webstandard (fast jedenfalls) sowie vergleichsweise gut unterstützt und vielerorts gut erklärt, aber eine Auffrischung lohnt sich. Schepp und Peter sprechen über die contain-Eigenschaft und ihre diversen Werte, display:contents (Draft, CanIUse) und position:sticky [00:25:12] DISPLAY LOCKING Es gibt einen Entwurf für eine API, die viele Performance-Use-Cases für Intersection Observers abdeckt und dabei noch besser ist! Wir vergleichen das vorgeschlagene rendersubtree-Attribut mit display: none (und klassischem Lazy Loading) sowie Origin Trials mit Vendor Prefixes. Am Ende phantasieren wir ein wenig über einen Polyfill für rendersubtree und eine Layout-Performance-Test-Seite im Stile von JSPerf. [00:52:44] KEINE SCHAUNOTIZEN VIDEOS DER PERFORMANCE.NOW() Schepp war auf der jüngsten Installation der Web-Performance-Konferenz und empfiehlt zahlreiche Talks.

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