How to save dependencies npm packages to another folder and hook the main files?

Question

npm

When using Bower, the .bowerrc file is written "directory" : "src/libs/"to save packages to the libs folder. The bower.json file contains overrides, where the paths to the main files are registered. With the help main-bower-files, I pick up the main files and throw them into the right folder. All this only applies to package dependencies.
Question! How to implement all the same but only without using Bower? For example, purely in npm or yarn.

Answer 1

How, how .. Javascript on the jamb =)))
Need to copy files? No problem! Let's write a copy task.

global.ROOT = 'корень проекта';
let config = {
  root: {
    build: 'dist'
  }
};

config.copy = [
    { src: 'source/assets/**', dest: '/'},
    { src: 'source/assets/.htaccess', dest: '/'},
    { src: 'node_modules/tiny-slider/dist/tiny-slider.js', dest: '/design/js' },
    { src: 'node_modules/tiny-slider/dist/tiny-slider.css', dest: '/design/css' },
    { src: 'node_modules/cool-menu/dist/cool-menu.js', dest: '/design/js' },
    { src: 'node_modules/svg4everybody/dist/svg4everybody.js', dest: '/design/js' },
    { src: 'node_modules/vanilla-text-mask/dist/vanillaTextMask.js', dest: '/design/js' },
    { src: 'node_modules/tippy.js/dist/tippy.all.min.js', dest: '/design/js' },
];

function copyFiles(conf, options) {
    return new Promise((resolve, reject) => {

        if (!('src' in conf)) reject('Invalid config for "copy" task: undefined "src" param');
        if (!('dest' in conf)) conf.dest = '';
        if ('extensions' in conf) { }

        let source = path.join(global.ROOT, conf.src);
        let dest   = path.join(global.ROOT, options.root.build, conf.dest);

        let pipeline = gulp.src(source).pipe(gulp.dest(dest));

        pipeline.on('error', function (err) {
            reject(err);
        });

        pipeline.on('end', function () {
            resolve();
        });

  });
}

gulp.task('copy', function(done){
  
  let copies = [];

  options.copy.forEach(item => {
    copies.push(copyFiles(item, options));
  });

  Promise.all(copies).then(value => done(), reason => done());
  
});