For example, here is some example output.
error secure-document Invalid SecureDocument API Line:109:29 scrapping = document.innerHTML; ^ warning no-plusplus Unary operator '++' used Line:120:50 for (var i = (index+1); i < sibs.length; i++) { ^ error secure-window Invalid SecureWindow API Line:33:21 var req = new XMLHttpRequest(); ^ error default-case Expected a default case Line:108:13 switch (e.keyCode) { ^
Issues are displayed, one for each warning or error. Each issue includes the line number, severity, and a brief description of the issue. It also includes the rule name, which you can use to look up a more detailed description of the issue. See “Salesforce Lightning CLI Rules” for the rules applied by Lightning CLI, as well as possible resolutions and options for further reading.
Your mission is to review each issue, examine the code in question, and to revise it to eliminate all of the genuine problems.
While no automated tool is perfect, we expect that most errors and warnings generated by Lightning CLI will point to genuine issues in your code, which you should plan to fix before using the code with LockerService enabled.