Recently, when writing js in jsp in the project, I always keep prompting: An internal error occurred during: "JavaScript translation for :..., which especially affects the coding efficiency, and it is easy to interrupt the train of thought. After some searching Found the solution to the problem on stackflow (original address: http://stackoverflow.com/questions/10181860/eclipse-error-javascript-translation-for-intentionally-not-implemented ), the method is very simple, just delete Workspace/. The .mylyn folder under metadata/, restart eclipse and it will be ok,
You can view the .log file under workspace/.metadate/ to view the eclipse error log.