[intellij-idea] How to correct indentation in IntelliJ

Code ? Reformat Code... (default Ctrl + Alt + L) for the whole file or Code ? Auto-Indent Lines (default Ctrl + Alt + I) for the current line or selection.

You can customise the settings for how code is auto-formatted under File ? Settings ? Editor ? Code Style.


To ensure comments are also indented to the same level as the code, you can simply do as follows:

UI screenshot (example for JavaScript)