Getting example in gulp-uglify to work

Question

I have never used gulp. I am trying out gulp-uglify example.

https://www.npmjs.com/package/gulp-uglify

var uglify = require('gulp-uglify');

gulp.task('compress', function() {
  return gulp.src('lib/*.js')
    .pipe(uglify())
    .pipe(gulp.dest('dist'));
});

The example does not work. Where is gulp.task declared? What does the code inside gulp.task do? A file dist will be created after compressing all .js files in lib folder? How can the code example be modified to work properly?

Answer 1

Working configuration

Gulpfile:

"use strict";

var gulp = require('gulp');
var uglify = require('gulp-uglify');

gulp.task('scripts', function() {
    gulp.src('./lib/*.js')
        .pipe(uglify())
        .pipe(gulp.dest('./dist/'));
});

package.json (run npm install to verify that all dependencies correctly loaded):

{
    "dependencies": {
        "gulp": "~3.9.0",
        "gulp-uglify": "~1.5.1"
    }
}