feat(rc): Web support for ABT & Rollouts #9293

athiramanu · 2025-10-03T06:20:24Z

This change is part of the feature to support Web Experiments in Remote Config. Changes can be broken down as below:

Introduces the experiment details in the fetch response type
Extracts experiments received from the fetch response and saves in indexedDB
Sets the experiment and variant received as user property

Design doc (internal): go/experiments-web

* feat: Process experiment metadata in RC fetch response * [Fix] Storage cache is not updating when there are no experiments in response * Add result of running yarn docgen:all * Address review comments * Fix yarn format failures * yarn docgen changes added * Export firebaseExperimentDescription --------- Co-authored-by: Athira M <[email protected]>

* feat: Process experiment metadata in RC fetch response * [Fix] Storage cache is not updating when there are no experiments in response * Add result of running yarn docgen:all * feat: Process experiment metadata in RC fetch response * feat: Add ABT support for remote config * [Fix] Storage cache is not updating when there are no experiments in response * Merge conflict fix * Yarn format fix * Fix merge conflicts * Address review comments * Fix yarn format failures * yarn docgen changes added * Export firebaseExperimentDescription * Address review comments --------- Co-authored-by: Athira M <[email protected]>

* feat: Process experiment metadata in RC fetch response * feat: Add ABT support for remote config * feat: Integrate firebase internal analytics with ABT * [Fix] Storage cache is not updating when there are no experiments in response * feat: Process experiment metadata in RC fetch response * [Fix] Storage cache is not updating when there are no experiments in response * Add result of running yarn docgen:all * feat: Process experiment metadata in RC fetch response * feat: Add ABT support for remote config * [Fix] Storage cache is not updating when there are no experiments in response * Merge conflict fix * Yarn format fix * Fix merge conflicts * Integrate ABT with Firebase analytics to add experiment as UP * Fix yarn format errors * Address review comments * Fix yarn format failures * yarn docgen changes added * Export firebaseExperimentDescription * Address review comments * Address review comments * Add unit tests * Add error handling * Remove log --------- Co-authored-by: Athira M <[email protected]>

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google-oss-bot · 2025-10-03T06:30:12Z

Size Report ¹

Affected Products

@firebase/remote-config
Type Base (ccbf7ba) Merge (0495bbf) Diff
browser 39.0 kB 41.5 kB +2.45 kB (+6.3%)
main 40.2 kB 42.7 kB +2.45 kB (+6.1%)
module 39.0 kB 41.5 kB +2.45 kB (+6.3%)
bundle
Type Base (ccbf7ba) Merge (0495bbf) Diff
remote-config (getAndFetch) 59.4 kB 60.9 kB +1.49 kB (+2.5%)
firebase
Type Base (ccbf7ba) Merge (0495bbf) Diff
firebase-compat.js 809 kB 811 kB +1.40 kB (+0.2%)
firebase-remote-config-compat.js 38.7 kB 40.1 kB +1.40 kB (+3.6%)
firebase-remote-config.js 43.5 kB 45.0 kB +1.45 kB (+3.3%)

Test Logs

https://storage.googleapis.com/firebase-sdk-metric-reports/ttQOuuVghm.html

google-oss-bot · 2025-10-03T06:41:58Z

Size Analysis Report ¹

Affected Products

`@firebase/remote-config`

`activate`

Size

Type	Base (`ccbf7ba`)	Merge (`0495bbf`)	Diff
size	23.5 kB	25.0 kB	+1.48 kB (+6.3%)
size-with-ext-deps	50.0 kB	51.5 kB	+1.49 kB (+3.0%)

Dependency

Type Base (ccbf7ba) Merge (0495bbf) Diff

classes

12 dependencies

CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

13 dependencies

CachingClient
EventEmitter
Experiment
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

+ Experiment

ensureInitialized
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 23.1 kB 23.5 kB +347 B (+1.5%)
size-with-ext-deps 49.6 kB 50.0 kB +347 B (+0.7%)

`fetchAndActivate`

Size

Type	Base (`ccbf7ba`)	Merge (`0495bbf`)	Diff
size	24.2 kB	25.6 kB	+1.48 kB (+6.1%)
size-with-ext-deps	50.7 kB	52.1 kB	+1.49 kB (+2.9%)

Dependency

Type Base (ccbf7ba) Merge (0495bbf) Diff

classes

12 dependencies

CachingClient
EventEmitter
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

13 dependencies

CachingClient
EventEmitter
Experiment
InMemoryStorage
IndexedDbStorage
RealtimeHandler
RemoteConfig
RemoteConfigAbortSignal
RestClient
RetryingClient
Storage
StorageCache
VisibilityMonitor

+ Experiment

fetchConfig
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 23.7 kB 24.1 kB +347 B (+1.5%)
size-with-ext-deps 50.2 kB 50.6 kB +347 B (+0.7%)
getAll
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 24.3 kB 24.7 kB +347 B (+1.4%)
size-with-ext-deps 50.8 kB 51.1 kB +347 B (+0.7%)
getBoolean
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 24.2 kB 24.5 kB +347 B (+1.4%)
size-with-ext-deps 50.7 kB 51.0 kB +347 B (+0.7%)
getNumber
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 24.2 kB 24.5 kB +347 B (+1.4%)
size-with-ext-deps 50.7 kB 51.0 kB +347 B (+0.7%)
getRemoteConfig
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 23.9 kB 24.3 kB +347 B (+1.5%)
size-with-ext-deps 57.3 kB 57.7 kB +347 B (+0.6%)
getString
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 24.2 kB 24.5 kB +347 B (+1.4%)
size-with-ext-deps 50.7 kB 51.0 kB +347 B (+0.7%)
getValue
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 24.1 kB 24.5 kB +347 B (+1.4%)
size-with-ext-deps 50.6 kB 51.0 kB +347 B (+0.7%)
isSupported
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 23.3 kB 23.6 kB +347 B (+1.5%)
size-with-ext-deps 49.7 kB 50.1 kB +347 B (+0.7%)
onConfigUpdate
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 23.3 kB 23.6 kB +347 B (+1.5%)
size-with-ext-deps 49.7 kB 50.1 kB +347 B (+0.7%)
setCustomSignals
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 23.6 kB 24.0 kB +347 B (+1.5%)
size-with-ext-deps 50.1 kB 50.5 kB +347 B (+0.7%)
setLogLevel
Size
Type Base (ccbf7ba) Merge (0495bbf) Diff
size 23.3 kB 23.6 kB +347 B (+1.5%)
size-with-ext-deps 49.8 kB 50.1 kB +347 B (+0.7%)

Test Logs

https://storage.googleapis.com/firebase-sdk-metric-reports/q9vXwtFG7C.html

nk-1983 · 2025-10-03T10:06:05Z

packages/remote-config/src/public_types.ts

+  // months.
+  timeToLiveMillis: string;
+
+  // A repeated of Remote Config parameter keys that this experiment is


This doesn't seem to read correctly.

Updated. Let me know whether it makes sense now

nk-1983 · 2025-10-03T10:10:47Z

docs-devsite/remote-config.fetchresponse.md


+## FetchResponse.experiments
+
+A/B Test and Rollout experiment metadata.


Metadata for A/B testing and Remote Config Rollout experiments

athiramanu and others added 3 commits September 27, 2025 16:42

athiramanu requested review from a team and erikeldridge as code owners October 3, 2025 06:20

athiramanu requested a review from nk-1983 October 3, 2025 06:47

nk-1983 reviewed Oct 3, 2025

View reviewed changes

Fix messages and docs

fa63f97


		## FetchResponse.experiments

		A/B Test and Rollout experiment metadata.

feat(rc): Web support for ABT & Rollouts #9293

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Size Report 1

Affected Products

@firebase/remote-config

bundle

firebase

Test Logs

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Size Analysis Report 1

Affected Products

@firebase/remote-config

activate

ensureInitialized

fetchAndActivate

fetchConfig

getAll

getBoolean

getNumber

getRemoteConfig

getString

getValue

isSupported

onConfigUpdate

setCustomSignals

setLogLevel

Test Logs

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athiramanu commented Oct 3, 2025 •

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Size Report ¹

`@firebase/remote-config`

`bundle`

`firebase`

google-oss-bot commented Oct 3, 2025 •

edited

Loading

Size Analysis Report ¹

`@firebase/remote-config`

`activate`

`ensureInitialized`

`fetchAndActivate`

`fetchConfig`

`getAll`

`getBoolean`

`getNumber`

`getRemoteConfig`

`getString`

`getValue`

`isSupported`

`onConfigUpdate`

`setCustomSignals`

`setLogLevel`