feat: Screen dimensions and UA as person property

[robbie-c]

Changes

Add screen / viewport dimensions as a person property
Also adds raw_user_agent

Needed to support some conversion destinations

Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers
• Accounted for backwards compatibility of any changes (no breaking changes in posthog-js!)

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Name	Status	Preview	Updated (UTC)
posthog-js	✅ Ready (Inspect)	Visit Preview	Mar 20, 2025 3:03pm

[greptile-apps]

PR Summary

Added screen dimensions, viewport dimensions, and user agent string as person properties in the PostHog JavaScript SDK for enhanced user tracking capabilities.

• Added $screen_height, $screen_width, $viewport_height, $viewport_width to EVENT_TO_PERSON_PROPERTIES array in /src/utils/event-utils.ts
• Added $raw_user_agent property with 1000 character limit truncation in Info.properties()
• Integrated new properties into existing person property collection flow
• Properties are automatically captured and included in all relevant event tracking

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[github-actions]

Size Change: +88 B (0%)

Total Size: 3.6 MB

Filename	Size	Change
dist/customizations.full.js	14.1 kB	+88 B (+0.63%)

ℹ️ View Unchanged

Filename	Size
dist/all-external-dependencies.js	220 kB
dist/array.full.es5.js	278 kB
dist/array.full.js	381 kB
dist/array.full.no-external.js	380 kB
dist/array.js	188 kB
dist/array.no-external.js	187 kB
dist/dead-clicks-autocapture.js	14.5 kB
dist/exception-autocapture.js	9.94 kB
dist/external-scripts-loader.js	2.75 kB
dist/main.js	189 kB
dist/module.full.js	381 kB
dist/module.full.no-external.js	380 kB
dist/module.js	189 kB
dist/module.no-external.js	187 kB
dist/posthog-recorder.js	211 kB
dist/recorder-v2.js	115 kB
dist/recorder.js	115 kB
dist/surveys-preview.js	71.3 kB
dist/surveys.js	76.6 kB
dist/tracing-headers.js	1.76 kB
dist/web-vitals.js	10.4 kB

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