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.

Answer 2

In my case I had forgotten to close some open functions in my javascript. Make sure you have all of your semicolons properly closed too.

Answer 3

ERROR: Unexpected token eof «undefined», expected punc «,» [-:630,15]

I believe all it means is that you are missing a , somewhere in your JS code, possibly on line 630, near character 15.

So if you concatenate the source of all your JS files, and take a look at line 630, you might find where the parser thought there was a missing comma.

Answer 4

This could also be because of a bug in UglifyJS when reading from stdin. See https://github.com/mishoo/UglifyJS2/issues/85 for details.

Answer 5

I got this same error with ember:

Build Error (UglifyWriter)
Unexpected token: eof (undefined)

The solution was to update ember-cli-moment-shim to version v3.8.0