Javascript-SDK - 4.0.0
## [4.0.0] - April 30, 2020
### New Features
- Removed lodash dependency - ES module entry point for the browser - `"module"` property of `package.json` points to `dist/optimizely.browser.es.min.js` ([#445](https://github.com/optimizely/javascript-sdk/pull/445))
### Breaking Changes
- Removed `Promise` polyfill from browser entry point ([417](https://github.com/optimizely/javascript-sdk/pull/417)). - Changed functionality of JSON schema validation in all entry points ([442](https://github.com/optimizely/javascript-sdk/pull/442)). - Previously, `skipJSONValidation` flag was used by the user to specify whether the JSON object should be validated. - Now, `skipJSONValidation` has been removed entirely from all entry points. Instead, a user will need to import `jsonSchemaValidator` from `@optimizely/optimizely-sdk/dist/optimizely.json_schema_validator.min.js` and pass it to `createInstance` to perform validation as shown below: ```js const optimizelySDK = require('@optimizely/optimizely-sdk'); const jsonSchemaValidator = require('@optimizely/optimizely-sdk/dist/optimizely.json_schema_validator.min');
// Require JSON schema validation for the datafile var optimizelyClientInstance = optimizely.createInstance({ datafile: datafile, jsonSchemaValidator: jsonSchemaValidator, }); ``` - Dropped support for Node.js version <8 ([#456](https://github.com/optimizely/javascript-sdk/pull/456))
### Bug fixes
- Changed `track()` to log a warning instead of an error when the event isn't in the datafile ([#418](https://github.com/optimizely/javascript-sdk/pull/418)) - Fixed return type for `close` method in TypeScript type definitions ([#410](https://github.com/optimizely/javascript-sdk/pull/410)) - Node.js datafile manager uses gzip,deflate compression for requests ([#456](https://github.com/optimizely/javascript-sdk/pull/456))