KevinGG opened a new pull request #12372: URL: https://github.com/apache/beam/pull/12372
1. Added a KernelModel module that handles messaging between the frontend and the connected kernel. 2. Integrated jest test framework with typescript. 3. Advanced prettier to 1.19 so that it can parse typescript optional chaining syntax. 4. The tests can be executed with `jlpm jest`. Test details see README. 5. Changes made by jlpm are: jlpm add --dev jest @types/jest ts-jest identity-obj-proxy jlpm upgrade prettier@^1.19.0 ------------------------ Thank you for your contribution! Follow this checklist to help us incorporate your contribution quickly and easily: - [ ] [**Choose reviewer(s)**](https://beam.apache.org/contribute/#make-your-change) and mention them in a comment (`R: @username`). - [ ] Format the pull request title like `[BEAM-XXX] Fixes bug in ApproximateQuantiles`, where you replace `BEAM-XXX` with the appropriate JIRA issue, if applicable. This will automatically link the pull request to the issue. - [ ] Update `CHANGES.md` with noteworthy changes. - [ ] If this contribution is large, please file an Apache [Individual Contributor License Agreement](https://www.apache.org/licenses/icla.pdf). See the [Contributor Guide](https://beam.apache.org/contribute) for more tips on [how to make review process smoother](https://beam.apache.org/contribute/#make-reviewers-job-easier). 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