hsuanxyz opened a new pull request #3528: [ZEPPELIN-4450] Provide Angular.js Template Migration Tool URL: https://github.com/apache/zeppelin/pull/3528 ### What is this PR for? We have implemented the frontend API of Angular.js using the latest Angular. But the templates some [differences](https://angular.io/guide/ajs-quick-reference) between Angular.js and Angular. So to help users migrate templates, we provide a migration tool that will be integrated into the Zeppelin web. This is its [DEMO](https://ng1-updater.hsuan.xyz/) it can quickly fix these differences. We plan to do the following work: 1. Add a new type `%ng` (official abbreviation) to distinguish between Angular.js and Angular templates. 2. When the user runs a paragraph with the `%angular` type, the upgrade dialog will be open. 3. Upgrade the template in the dialog and click the `Update and Copy` button. 4. Automatically create a paragraph of type `%ng` template in below ### What type of PR is it? [Feature] ### What is the Jira issue? https://issues.apache.org/jira/browse/ZEPPELIN-4321 https://issues.apache.org/jira/browse/ZEPPELIN-4450 ### How should this be tested? * First time? Setup Travis CI as described on https://zeppelin.apache.org/contribution/contributions.html#continuous-integration * Strongly recommended: add automated unit tests for any new or changed behavior * Outline any manual steps to test the PR here. ### Screenshots (if appropriate)  ### Questions: * Does the licenses files need update? NO * Is there breaking changes for older versions? NO * Does this needs documentation? NO
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