External file for sourcemap

Question

I am new to sourcemapping, but I am asked to save sourcemap in an external file, but so far I have managed to concat the sourcemap to the minified .js file. What should I add or take out from this? Or maybe I have got this completely wrong..

return gulp.src(sourceFiles)
           .pipe(sourcemaps.init())
           .pipe(concat('minifiedJS.min.js'))
           .pipe(sourcemaps.write('maps'))
           .pipe(gulp.dest(destinationFolder))

Answer 1

From the docs for gulp-sourcemaps:

To write external source map files, pass a path relative to the destination to sourcemaps.write().

Try passing the current directory (.) as the target path for the source maps.

return gulp.src(sourceFiles)
           .pipe(sourcemaps.init())
           .pipe(concat('minifiedJS.min.js'))
           .pipe(sourcemaps.write('.'))
           .pipe(gulp.dest(destinationFolder))