Adds LocalStorageAssignmentCache with persistent implementation between sessions to lower assignment logging; enabled by default (FF-839) #43
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…en sessions to lower assignment logging; enabled by default (FF-839)
leoromanovsky
commented
Dec 18, 2023
| @@ -57,8 +57,8 @@ | |||
| "xhr-mock": "^2.5.1" | |||
| }, | |||
| "dependencies": { | |||
| "@eppo/js-client-sdk-common": "^1.7.0", | |||
| "axios": "^0.27.2", | |||
| "@eppo/js-client-sdk-common": "2.0.0", | |||
| "@eppo/js-client-sdk-common": "^1.7.0", | ||
| "axios": "^0.27.2", | ||
| "@eppo/js-client-sdk-common": "2.0.0", | ||
| "axios": "^1.6.0", |
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Needed to upgrade axios to match the major version in the commons sdk otherwise would not compile
| @@ -256,6 +257,36 @@ describe('EppoJSClient E2E test', () => { | |||
| }); | |||
| }); | |||
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| describe('LocalStorageAssignmentCache', () => { | |||
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testing the cache directly instead of as an integration with getAssignment as those already existing in the commons
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| public has(key: string): boolean { | ||
| if (!hasWindowLocalStorage()) { | ||
| return false; |
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Thought about throwing an error here however there's nothing with people disabling this API and functionally the SDK should continue to work.
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Makes sense to me too. No error throwing here 👍
sameerank
approved these changes
Dec 20, 2023
aarsilv
approved these changes
Dec 20, 2023
| @@ -256,6 +257,36 @@ describe('EppoJSClient E2E test', () => { | |||
| }); | |||
| }); | |||
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| describe('LocalStorageAssignmentCache', () => { | |||
| try { | ||
| return typeof window !== 'undefined' && !!window.localStorage; | ||
| } catch { | ||
| // Chrome throws an error if local storage is disabled and you try to access it |
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labels: mergeable
Fixes: #issue
Motivation and Context
Downstream related change: Eppo-exp/js-sdk-common#33 enables passing an implementation.
The goal is for users of Eppo's SDK in the browser to remove duplicate assignments within and now between sessions.
We are creating a cache based on
LocalStoragewhich is a unique API to browsers.Description
LocalStoragekey for the entire assignment cache - it is always for a single subject.How has this been tested?