gulpfile.js

const gulp = require("gulp");
const sass = require("gulp-sass");
const concat = require('gulp-concat');
const uglify = require('gulp-uglify');
const rename = require("gulp-rename");

const b = require("browser-sync").create();

const typescript = require('gulp-typescript');
const tsc = typescript.createProject('tsconfig.json');

/*
============================================================================================================
tasks - main
============================================================================================================
*/

gulp.task("dev", ["watch"]);
gulp.task("build", ["sass", "ts", "minify"]);
gulp.task("default", ["dev"]);

/*
============================================================================================================
tasks - subs
============================================================================================================
*/

gulp.task('ts', function () {
  const prj = tsc.src()
    .pipe(tsc())
    .on('error', e => console.error(e));

  return prj.js.pipe(gulp.dest('.'));
});

gulp.task("sass", function () {
  return gulp.src("./src/*.scss")
    .pipe(sass({ outputStyle: 'compressed' }))
    .on('error', e => console.error(e))
    .pipe(rename("tuna-jsdatepicker.css"))
    .pipe(gulp.dest("./dist"));
});

gulp.task("minify", function () {
  return gulp.src([
    './node_modules/tuna-jstemplate/dist/tuna-jstemplate.js',
    './dist/tuna-jsdatepicker.js'
  ])
    .pipe(concat('tuna-jsdatepicker.bundled.js'))
    .pipe(gulp.dest('./dist'))
    .pipe(rename('tuna-jsdatepicker.bundled.min.js'))
    .pipe(uglify())
    .pipe(gulp.dest('./dist'));
});

gulp.task("watch", ["ts", "sass", "browsersync"], function () {
  gulp.watch("./src/**/*.ts", ["ts"]);
  gulp.watch("./src/**/*.scss", ["sass"]);

  gulp.watch("./dist/**/*.*").on('change', b.reload);
  gulp.watch("./demo/**/*.html").on('change', b.reload);
});

gulp.task("browsersync", function () {
  b.init({
    server: {
      baseDir: ["./demo"],
      routes: {
        "/dist": "dist",
        "/node_modules": "node_modules"
      }
    },
  })
});