new class is added

[MAYANK816]

Make sure these boxes are checked before your pull request (PR) is ready to be reviewed and merged. Thanks!

• [ ] tests pass -- look for a green checkbox ✔️ a few minutes after opening your PR -- or run tests locally with grunt jasmine
• [ ] code is in uniquely-named feature branch and has no merge conflicts
• [ ] PR is descriptively titled
• [ ] PR body includes fixes #0000-style reference to original issue #
• [ ] ask @publiclab/reviewers for help, in a comment below

We're happy to help you get this ready -- don't be afraid to ask for help, and don't be discouraged if your tests fail at first!

If tests do fail, click on the red X to learn why by reading the logs.

Please be sure you've reviewed our contribution guidelines at https://publiclab.org/contributing-to-public-lab-software

We have a loose schedule of reviewing and pulling in changes every Tuesday and Friday, and publishing changes on Fridays.

Thanks!

[welcome[bot]]

Thanks for opening this pull request! This space is protected by our Code of Conduct - and we're here to help. Please make sure you've bumped up the version number in the repository's package.json file and that you've incorporated your changes in the /dist/ sub-directory by running grunt build. Dangerbot will test out your code and reply in a bit with some pointers and requests. Also please refer here for installation help 💿
There may be some errors, but don't worry! We'll work through them with you! 👍🎉😄
One thing that can help to get started is to make sure you've included a link back to the original issue you're solving, in the format fixes #0000 (for example). And to make sure the PR title describes what you're trying to do! (often it can be the same as the issue title) Thanks! 🙌
Then, you can say hello in our chatroom & share a link to this PR to get a review! 👋 ✅

[gitpod-io[bot]]