build it all up

build.js

+const {minify} = require("terser"),
+    fs = require('fs'),
+    path = require( 'path'),
+
+    DOM = ['DOM.js'],
+    rDOM = DOM.concat('Observer.js', 'Store.js', 'Transform.js'),
+    dir = 'build',
+    header = `/* Vanilla.js Reactivity by Ivan Kubota. 
+* ©Form.dev 2012—${(new Date()).getFullYear()}
+* License: MPL-2.0 for not commercial use and all projects that involves me 
+*/
+`;
+    build = {
+      DOM,
+      rDOM
+    },
+
+    hash = {};
+
+Object
+  .values(build)
+  .forEach(files =>
+    files.forEach(fileName =>
+      hash[fileName] = hash[fileName] || fs.readFileSync(fileName).toString('utf-8')
+    )
+  );
+
+(async function(){
+
+
+  for( let outFileName in build ){
+    let
+      dest = path.join( dir, outFileName ),
+      source = header +
+        (await minify(
+          build[ outFileName ].map( fileName => hash[ fileName ] ).join( ';' )
+        )).code;
+    fs.writeFileSync( dest, source );
+    console.log( `Build ${dest} ${( source.length / 1024 ).toFixed( 2 )}K` )
+  }
+
+
+})();
\ No newline at end of file

package.json

+{
+  "name": "react-vanilla",
+  "version": "1.0.0",
+  "description": "",
+  "main": "DOM.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git@gitlab.quokka.pub:Zibx/react-vanilla.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "MPL-2.0",
+  "dependencies": {
+    "terser": "^5.4.0"
+  }
+}

yarn.lock

+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+buffer-from@^1.0.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
+  integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
+
+commander@^2.20.0:
+  version "2.20.3"
+  resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.3.tgz#fd485e84c03eb4881c20722ba48035e8531aeb33"
+  integrity sha512-GpVkmM8vF2vQUkj2LvZmD35JxeJOLCwJ9cUkugyk2nuhbv3+mJvpLYYt+0+USMxE+oj+ey/lJEnhZw75x/OMcQ==
+
+source-map-support@~0.5.19:
+  version "0.5.19"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.19.tgz#a98b62f86dcaf4f67399648c085291ab9e8fed61"
+  integrity sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==
+  dependencies:
+    buffer-from "^1.0.0"
+    source-map "^0.6.0"
+
+source-map@^0.6.0:
+  version "0.6.1"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
+  integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
+
+source-map@~0.7.2:
+  version "0.7.3"
+  resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.7.3.tgz#5302f8169031735226544092e64981f751750383"
+  integrity sha512-CkCj6giN3S+n9qrYiBTX5gystlENnRW5jZeNLHpe6aue+SrHcG5VYwujhW9s4dY31mEGsxBDrHR6oI69fTXsaQ==
+
+terser@^5.4.0:
+  version "5.4.0"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-5.4.0.tgz#9815c0839072d5c894e22c6fc508fbe9f5e7d7e8"
+  integrity sha512-3dZunFLbCJis9TAF2VnX+VrQLctRUmt1p3W2kCsJuZE4ZgWqh//+1MZ62EanewrqKoUf4zIaDGZAvml4UDc0OQ==
+  dependencies:
+    commander "^2.20.0"
+    source-map "~0.7.2"
+    source-map-support "~0.5.19"