Why did the minification of js files stop working?

Question

gulp.js

On an equal footing, js files stopped being compressed, the assembly worked stably for a long time, no changes have been made recently.
Actually I enclose a healthy piece of code.

"use strict";

var gulp = require("gulp"),
    debug = require('gulp-debug'),
    autoprefixer = require("gulp-autoprefixer"),
    cssbeautify = require("gulp-cssbeautify"),
    removeComments = require('gulp-strip-css-comments'),
    rename = require("gulp-rename"),
    ngrok = require('ngrok'),
    webserver = require("browser-sync"),
    sass = require("gulp-sass"), 
    cssnano = require("gulp-cssnano"),
    rigger = require("gulp-rigger"),
    uglify = require("gulp-uglify"),
    watch = require("gulp-watch"),
    plumber = require("gulp-plumber"),
    imagemin = require("gulp-imagemin"),
    imageminJpegRecompress = require('imagemin-jpeg-recompress'),
    pngquant = require('imagemin-pngquant'),
    run = require("run-sequence").use(gulp),
    rimraf = require("rimraf"),
    cached = require('gulp-cached'),
    cache = require('gulp-cache'),
    newer = require('gulp-newer'),
    gutil = require('gulp-util');



/* Paths to source/build/watch files
=========================*/

var path = {
    build: {
        html: "build/",
        js: "build/assets/js/",
        css: "build/assets/css/",
        img: "build/assets/i/",
        fonts: "build/assets/fonts/"
    },
    src: {
        html: "src/*.{htm,html}",
        js: "src/assets/js/*.js",
        css: "src/assets/sass/style.scss",
        img: "src/assets/i/**/*.*",
        fonts: "src/assets/fonts/**/*.*"
    },
    watch: {
        html: "src/**/*.{htm,html}",
        js: "src/assets/js/**/*.js",
        css: "src/assets/sass/**/*.scss",
        img: "src/assets/i/**/*.*",
        fonts: "src/assets/fonts/**/*.*"
    },
    clean: "./build"
};



/* Webserver config
=========================*/
var config = {
    server: {
        baseDir: "build/"
    },
    tunnel: true,
    host: 'localhost',
    port: 3000,
    directoryListing: true,
    logPrefix: ''
};



/* Tasks
=========================*/

gulp.task("webserver", function () {
    webserver(config, function (err, bs) {
           ngrok.connect({
                    proto: 'http', // http|tcp|tls
                    addr: bs.options.get('port'), // port or network address
                }, function (err, url) {
                    gutil.log('[ngrok]', ' => ', gutil.colors.magenta.underline(url));
                });
        });
});

/* Build HTML
==================================*/
gulp.task("html:build", function () {
    return gulp.src(path.src.html)
        .pipe(plumber())
        .pipe(rigger())
        .pipe(gulp.dest(path.build.html))
        .pipe(webserver.reload({stream: true}));
});


/* Build CSS
==================================*/

gulp.task("css:build", function () {
    return gulp.src(path.src.css)
        // .pipe(cached('sass'))
        .pipe(plumber())
        .pipe(sass())
        .pipe(autoprefixer({
            browsers: ["last 5 versions"],
            cascade: true
        }))
        .pipe(removeComments())
        .pipe(cssbeautify())
        .pipe(gulp.dest(path.build.css))
        .pipe(cssnano({
            zindex: false,
            discardComments: {
                removeAll: true
            }
        }))
        .pipe(rename("style.min.css"))
        .pipe(gulp.dest(path.build.css))
        .pipe(webserver.reload({stream: true}));
});

/* Build JS
==================================*/

gulp.task("js:build", function () {
    return gulp.src(path.src.js)
        .pipe(plumber())
        .pipe(rigger())
        .pipe(gulp.dest(path.build.js))
        .pipe(uglify())
        .pipe(removeComments())
        .pipe(rename("main.min.js"))
        .pipe(gulp.dest(path.build.js))
        .pipe(webserver.reload({stream: true}));
});

/* Build fonts
==================================*/

gulp.task("fonts:build", function() {
    return gulp.src(path.src.fonts)
        .pipe(gulp.dest(path.build.fonts));
});

/* Build IMG
==================================*/

gulp.task("image:build", function () {
    return gulp.src(path.src.img)
        .pipe(cache(imagemin([
            imagemin.jpegtran({progressive: true}),
            imageminJpegRecompress({
                loops: 5,
                min: 65,
                max: 70,
                quality:'medium'
            }),
            imagemin.svgo(),
            imagemin.optipng({optimizationLevel: 3}),
            pngquant({quality: '65-70', speed: 5})
        ],{
                verbose: true
            })))
        .pipe(gulp.dest(path.build.img));
    });

gulp.task("clean", function (cb) {
    rimraf(path.clean, cb);
});

gulp.task('build', function (cb) {
    run(
        "clean",
        "html:build",
        "css:build",
        "js:build",
        "fonts:build",
        "image:build"
    , cb);
});


gulp.task("watch", function() {
    watch([path.watch.html], function(event, cb) {
        gulp.start("html:build");
    });
    watch([path.watch.css], function(event, cb) {
        gulp.watch('src/assets/i/**/*.*', ['image:build']);
        gulp.start("css:build");
    });
    watch([path.watch.js], function(event, cb) {
        gulp.start("js:build");
    });
    watch([path.watch.img], function(event, cb) {
        gulp.start("image:build");
    });
    watch([path.watch.fonts], function(event, cb) {
        gulp.start("fonts:build");
    });
});


gulp.task("default", function (cb) {
   run(
       "clean",
       "build",
       "webserver",
       "watch"
   , cb);
});

Answer 1

Solved a problem. The problem was not in the file build configuration, but in the correct connection of custom js files in the main main.js file (no matter how paradoxical it may sound). Before that, I didn’t know that if the code block comes first in the html code, then in the general js assembly file it should go above the rest, now I know from my own experience.