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Dev guide

JavaScript (Browser) SDK prior to v6

An overview and links for the Optimizely Feature Experimentation JavaScript (Browser) SDK.

Version

This documentation is for JavaScript SDK versions 5.3.5 and earlier.

For the latest JavaScript documentation, see JavaScript SDK.

See the SDK compatibility matrix documentation for a list of current SDK releases and the features they support.

Reference

For reference documentation, see the left-hand menu, or start by installing the JavaScript (Browser) SDK.

Source files

You can find the JavaScript SDK repository and Releases on GitHub.