Device & browser capabilities
Technical guides about device & browser capabilities, written for practical follow-up.
Guides in this topic
5 articlesThe phone keyboard hid your button. Measure the visual viewport
Compare layout and visual viewport dimensions when zoom, browser chrome or an on-screen keyboard changes the usable area.
The API exists. Can this page actually use it?
Go beyond property detection to inspect secure contexts, permissions and the result of a real API operation.
Your offline data fits today. Plan for the next failed write
Interpret storage estimates and persistence requests while designing recovery for quota changes and eviction.
A supported video type still fails: narrow down the playback layer
Separate container and codec checks from decoding, delivery and the real asset used by your player.
The date is correct but the display is wrong: isolate locale and timezone
Reproduce formatting bugs by recording the instant, locale, timezone and options used by the application.
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5 guides