`module: true` Causes "SyntaxError in plugin 'terser': Unexpected token eof (undefined)"

[jeremy-harnois]

Where Module.js is an ES6 module,

gulp.src('Module.js')
    .pipe(gulpTerser({module: true}))
    .pipe(gulp.dest('public/js'))

results in

SyntaxError in plugin "terser"
Message:
    Unexpected token: eof (undefined)
Details:
    filename: 0
    ...

while

gulp.src('script.js')
    .pipe(gulpTerser())
    .pipe(gulp.dest('public/js'))

does not.

Upgrading terser to latest (5.5.1) appears to resolve.

[duan602728596]

You can try to configure Terser's ecma configuration, I think this error is caused by js syntax.

[arabine]

Still not work :

.pipe(terser({ecma: 2015}))

[duan602728596]

Still not work :

.pipe(terser({ecma: 2015}))

Does your code contain versions above 2015, and you have not compiled the code?

[jeremy-harnois]

You can try to configure Terser's ecma configuration, I think this error is caused by js syntax.

The same Gulp task was working prior, and upgrading Terser solved the issue without changing the source script, so I don't believe it's a syntax error.

There's some conversation about this in Terser issues. I'm not using Ember, but it appears some package changes elsewhere caused issues in Terser. I suspect they resolved those, which is likely why upgrading Terser in this package fixed this issue for me.

[arabine]

Still not work : .pipe(terser({ecma: 2015}))

Does your code contain versions above 2015, and you have not compiled the code?

Maybe! But my problem was elsewhere (a gulp task that remove all console.log resulting bad code). I end up using Terser directly from the command line. Did not tried gulp-terser after that sorry :(