gulpfile.js

const gulp = require("gulp");
const htmlmin = require("gulp-htmlmin");
const htmlclean = require("gulp-htmlclean");
const version = require("gulp-version-number");
const terser = require("gulp-terser");

// Compress js files
gulp.task("js", function () {
  return gulp
    .src(["./public/js/main.js"])
    .pipe(
      terser({
        compress: true,
      }),
    )
    .pipe(gulp.dest("./public/js"));
});

// Build html files
gulp.task("html", function () {
  return gulp
    .src("./public/**/*.html")
    .pipe(htmlclean())
    .pipe(
      htmlmin({
        removeComments: true,
        minifyJS: true,
        minifyCSS: true,
        minifyURLs: true,
      }),
    )
    .pipe(
      version({
        append: {
          key: "_v",
          cover: 1,
          to: ["css", "js", "png", "jpg", "woff2"],
        },
      }),
    )
    .pipe(gulp.dest("./public"));
});

gulp.task("default", gulp.parallel("js", "html"));