Added rollup.js to build compile down the code

Author: larsvankleef

.gitignore

@@ -1,2 +1,3 @@
 /node_modules
 /coverage
+/build

.npmignore

@@ -0,0 +1,10 @@
+.DS_Store
+node_modules
+npm-debug.log
+src/
+*.test.js
+coverage/
+rollup.config.js
+.gitignore
+.prettierrc
+jest.config.js

package.json

@@ -1,17 +1,24 @@
 {
   "name": "@stackkit/validate",
   "version": "0.0.1",
-  "main": "src/validate.js",
+  "main": "build/index.cjs.js",
+  "module": "build/index.esm.js",
+  "browser": "build/index.js",
   "repository": "[email protected]:stackkit/validate.git",
   "author": "larsvankleef <[email protected]>",
   "license": "MIT",
   "scripts": {
     "test": "jest --coverage",
     "test:watch": "jest --watch",
-    "test:open": "open coverage/lcov-report/index.html"
+    "test:open": "open coverage/lcov-report/index.html",
+    "build": "npx rollup -c"
   },
   "devDependencies": {
+    "@rollup/plugin-commonjs": "^14.0.0",
+    "@rollup/plugin-node-resolve": "^8.4.0",
     "jest": "^26.2.2",
-    "prettier": "^2.0.5"
+    "prettier": "^2.0.5",
+    "rollup": "^2.23.1",
+    "rollup-plugin-filesize": "^9.0.2"
   }
 }

rollup.config.js

@@ -0,0 +1,45 @@
+
+import resolve from '@rollup/plugin-node-resolve';
+import commonjs from '@rollup/plugin-commonjs';
+import filesize from 'rollup-plugin-filesize';
+
+import pkg from './package.json';
+
+const INPUT_FILE_PATH = 'src/index.js';
+const OUTPUT_NAME = 'Example';
+
+const PLUGINS = [
+  resolve({
+    browser: true,
+  }),
+  commonjs(),
+  filesize(),
+];
+
+const OUTPUT_DATA = [
+  {
+    file: pkg.browser,
+    format: 'umd',
+  },
+  {
+    file: pkg.main,
+    format: 'cjs',
+  },
+  {
+    file: pkg.module,
+    format: 'es',
+  },
+];
+
+const config = OUTPUT_DATA.map(({ file, format }) => ({
+  input: INPUT_FILE_PATH,
+  output: {
+    file,
+    format,
+    name: OUTPUT_NAME,
+    exports: 'default'
+  },
+  plugins: PLUGINS,
+}));
+
+export default config;

src/validate.js renamed to src/index.js

@@ -1,11 +1,11 @@
 function validate(fields, { rules }) {
   const checked = []
 
-  if (!fields || !rules || !rules.fields ) {
+  if (!fields || !rules || !rules.fields) {
     return { valid: false, results: [] }
   }
 
-  Object.keys(rules.fields).forEach((field) => {
+  Object.keys(rules.fields).forEach(field => {
     const value = fields[field]
     const rule = rules.fields[field]
 

src/validation/index.js

@@ -35,5 +35,5 @@ module.exports = {
   email,
   length,
   number,
-  required
+  required,
 }