uglify js error unexpected token eof “undefined”

Question

So I installed npm using npm install uglify-js

I run a command which is:

cat file1.js file2.js .. fileN.js | uglifyjs -o files.min.js

Answer 1

Also faced this same issue. However, in my case, I could open the file with a problem and save it and then uglify would run without any issues.

Documented here

Workaround: I added a lineending task before invoking uglify to explicitly convert the line endings. Now uglify runs without issues.