feat: Load site functions via RemoteConfig

[benjackwhite]

Changes

Needs #1581
Needs PostHog/posthog#26671

• Moves the site functions to only be loaded the new way
• Changes the loading mentality so that the caller is responsible for initializing and passing things in (this is pretty important as we don't want the server side code to be calling non-top-level methods as they might change over time).

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	Dec 6, 2024 9:37am

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[github-actions]

Size Change: +11 kB (+0.35%)

Total Size: 3.21 MB

Filename	Size	Change
dist/array.full.es5.js	260 kB	+1.27 kB (+0.49%)
dist/array.full.js	364 kB	+1.08 kB (+0.3%)
dist/array.full.no-external.js	362 kB	+1.08 kB (+0.3%)
dist/array.js	178 kB	+1.08 kB (+0.61%)
dist/array.no-external.js	176 kB	+1.08 kB (+0.62%)
dist/main.js	179 kB	+1.08 kB (+0.61%)
dist/module.full.js	364 kB	+1.08 kB (+0.3%)
dist/module.full.no-external.js	362 kB	+1.08 kB (+0.3%)
dist/module.js	178 kB	+1.08 kB (+0.61%)
dist/module.no-external.js	177 kB	+1.08 kB (+0.62%)

ℹ️ View Unchanged

Filename	Size
dist/all-external-dependencies.js	206 kB
dist/customizations.full.js	12.6 kB
dist/dead-clicks-autocapture.js	14.4 kB
dist/exception-autocapture.js	9.48 kB
dist/external-scripts-loader.js	2.48 kB
dist/recorder-v2.js	115 kB
dist/recorder.js	115 kB
dist/surveys-preview.js	57.6 kB
dist/surveys.js	63.3 kB
dist/tracing-headers.js	1.75 kB
dist/web-vitals.js	10.3 kB

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[benjackwhite]

Decided this should always be on as its super useful when testing around

[mariusandra]

Looks good. The only question I had was if legacy site apps still work, but reading the code more it seems like that's handled. So ✅

[benjackwhite]

Looks good. The only question I had was if legacy site apps still work, but reading the code more it seems like that's handled. So ✅

They should do. The actual path for loading them is basically identical to before. I'll test again for sure before merging thouh.