GitHub user 1ambda reopened a pull request: https://github.com/apache/zeppelin/pull/2580
[ZEPPELIN-2924] Fix broken javascript source map ### What is this PR for? Fixed broken javascript source map. The coverage loader should be used only for test env. **that's really annoying because we can't set breakpoint and even can't see the original source code.** ### What type of PR is it? [Bug Fix] ### What is the Jira issue? [ZEPPELIN-2924](https://issues.apache.org/jira/browse/ZEPPELIN-2924) ### How should this be tested? 1. run the webapp as dev mode: `localhost:9000` 2. open the developer console and click any log message 3. check whether source is minified or not. 4. execute `yarn run test` in the terminal to check that coverage feature works well. ### Screenshots (if appropriate) #### Before   #### After   ### Questions: * Does the licenses files need update? - NO * Is there breaking changes for older versions? - NO * Does this needs documentation? - NO You can merge this pull request into a Git repository by running: $ git pull https://github.com/1ambda/zeppelin ZEPPELIN-2924/fix-source-map-is-broken Alternatively you can review and apply these changes as the patch at: https://github.com/apache/zeppelin/pull/2580.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #2580 ---- commit 375e13945b12a43aec47a4809b6b16be314ba001 Author: 1ambda <1am...@gmail.com> Date: 2017-09-11T06:09:10Z fix: Use coverage loader only for test env ---- ---