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.gitignore

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+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+report.[0-9]*.[0-9]*.[0-9]*.[0-9]*.json
+
+# Runtime data
+pids
+*.pid
+*.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+*.lcov
+
+# nyc test coverage
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directories
+node_modules/
+jspm_packages/
+
+# TypeScript v1 declaration files
+typings/
+
+# TypeScript cache
+*.tsbuildinfo
+
+# Optional npm cache directory
+.npm
+
+# Optional eslint cache
+.eslintcache
+
+# Microbundle cache
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+.node_repl_history
+
+# Output of 'npm pack'
+*.tgz
+
+# Yarn Integrity file
+.yarn-integrity
+
+# dotenv environment variables file
+.env
+.env.test
+
+# parcel-bundler cache (https://parceljs.org/)
+.cache
+.parcel-cache/
+
+# Next.js build output
+.next
+
+# Nuxt.js build / generate output
+.nuxt
+dist
+
+# Gatsby files
+.cache/
+# Comment in the public line in if your project uses Gatsby and *not* Next.js
+# https://nextjs.org/blog/next-9-1#public-directory-support
+# public
+
+# vuepress build output
+.vuepress/dist
+
+# Serverless directories
+.serverless/
+
+# FuseBox cache
+.fusebox/
+
+# DynamoDB Local files
+.dynamodb/
+
+# TernJS port file
+.tern-port
+
+# npm
+package-lock.json

LICENSE

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+MIT License
+
+Copyright (c) 2021 Xvezda <[email protected]>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# :eyes: vom.js
+React-like 인터페이스를 제공하는 SPA 프레임워크
+
+## Demo
+
+https://xvezda.github.io/vom.js/
+

lerna.json

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+{
+  "version": "0.0.0",
+  "npmClient": "yarn",
+  "useWorkspaces": true
+}

package.json

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+{
+  "name": "@vomjs/monorepo",
+  "author": {
+    "name": "Xvezda",
+    "email": "[email protected]",
+    "url": "https://xvezda.com/"
+  },
+  "scripts": {
+    "bootstrap": "lerna bootstrap",
+    "build": "yarn workspace vomjs build"
+  },
+  "devDependencies": {
+    "gh-pages": "^3.2.3",
+    "lerna": "^4.0.0"
+  },
+  "workspaces": [
+    "packages/*",
+    "packages/**/examples/*"
+  ],
+  "private": true
+}

packages/vomjs-store/README.md

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+# @vomjs/store
+
+[Flux](https://facebook.github.io/flux/), [Redux](https://redux.js.org/)의 인터페이스를 참고하여 구현한 상태관리 모듈입니다.

packages/vomjs-store/package.json

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+{
+  "name": "@vomjs/store",
+  "version": "0.0.0",
+  "description": "Flux 아키텍처를 구현한 상태관리 모듈",
+  "main": "src/index.js",
+  "devDependencies": {
+    "@babel/core": "^7.15.5",
+    "babel-jest": "^27.2.0",
+    "jest": "^27.2.0"
+  },
+  "scripts": {
+    "test": "jest"
+  },
+  "author": {
+    "name": "Xvezda",
+    "email": "[email protected]",
+    "url": "https://xvezda.com/"
+  },
+  "keywords": []
+}

packages/vomjs-store/src/dispatcher.js

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+export default class Dispatcher {
+  constructor() {
+    this.$callbacks = new Map;
+    this.$pending = new Set;
+    this.$id = -1;
+    this._invokeId = -1;
+    this._pendingPayload = undefined;
+
+    this._invokeCallback = this._invokeCallback.bind(this);
+    this._broadcast = this._broadcast.bind(this);
+    this.waitFor = this.waitFor.bind(this);
+    this.register = this.register.bind(this);
+    this.unregister = this.unregister.bind(this);
+    this.dispatch = this.dispatch.bind(this);
+    this.isDispatching = this.isDispatching.bind(this);
+  }
+
+  _invokeCallback(id) {
+    this._invokeId = id;
+    if (this.$pending.has(id)) {
+      this.waitFor([...this.$pending]);
+    } else {
+      this.$pending.add(id);
+      this.$callbacks.get(id)(this._pendingPayload);
+      this.$pending.delete(id);
+    }
+    this._invokeId = -1;
+  }
+
+  _broadcast() {
+    [...this.$callbacks.keys()].forEach(this._invokeCallback);
+  }
+
+  register(callback) {
+    ++this.$id;
+    this.$callbacks.set(this.$id, callback);
+    return this.$id;
+  }
+
+  unregister(id) {
+    this.$callbacks.delete(id);
+  }
+
+  waitFor(ids) {
+    this.$pending.add(this._invokeId);
+    const copy = new Set([...ids]);
+    while ([...copy].filter(id => typeof id !== 'undefined').map(id => this.$pending.has(id)).some(x => x)) {
+      [...copy].forEach(id => {
+        copy.delete(id);
+        this.$pending.delete(id);
+        this._invokeCallback(id);
+      });
+    }
+  }
+
+  dispatch(payload) {
+    if (!this.isDispatching()) {
+      this._pendingPayload = payload;
+      this._broadcast();
+      this._pendingPayload = undefined;
+    }
+    this.$pending.clear();
+  }
+
+  isDispatching() {
+    return this._invokeId !== -1;
+  }
+}

packages/vomjs-store/src/index.js

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+export { default as Dispatcher } from './dispatcher.js';
+export { default as Store } from './store.js';
+export { ReduceStore, createStore } from './reduce.js';

packages/vomjs-store/src/reduce.js

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+import Dispatcher from './dispatcher.js';
+import Store from './store.js';
+
+export class ReduceStore extends Store {
+  constructor(dispatcher) {
+    super(dispatcher);
+    this.$state = this.getInitialState();
+  }
+
+  getState() {
+    return this.$state;
+  }
+
+  getInitialState() {}
+
+  /* eslint-disable-next-line no-unused-vars */
+  reduce(state, action) {}
+
+  areEqual(one, two) {
+    return Object.is(one, two);
+  }
+
+  onDispatch(payload) {
+    const newState = this.reduce(this.getState(), payload);
+    if (!this.areEqual(newState, this.getState())) {
+      this.$state = newState;
+    }
+  }
+}
+
+export const createStore = (reducer) => {
+  const dispatcher = new Dispatcher;
+  class CreatedStore extends ReduceStore {
+    dispatch(payload) {
+      return dispatcher.dispatch(payload);
+    }
+  }
+  CreatedStore.prototype.reduce = reducer;
+  CreatedStore.prototype.subscribe = ReduceStore.prototype.addListener;
+
+  const store = new CreatedStore(dispatcher);
+  dispatcher.dispatch({type: '@@store/INIT'});
+
+  return store;
+};

packages/vomjs-store/src/reduce.spec.js

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+import { jest } from '@jest/globals';
+import { createStore } from './reduce.js';
+
+test('카운터 예제 테스트', () => {
+  // Redux-like 인터페이스를 테스트하기 위해 동일한 예제를 사용한다.
+  // https://redux.js.org/introduction/getting-started
+  function counterReducer(state = {value: 0}, action) {
+    switch (action.type) {
+      case 'counter/incremented':
+        return {value: state.value + 1};
+      case 'counter/decremented':
+        return {value: state.value - 1};
+      default:
+        return state;
+    }
+  }
+
+  const store = createStore(counterReducer);
+  const subscriberMock = jest.fn();
+  store.subscribe(() => subscriberMock(store.getState()));
+
+  store.dispatch({type: 'counter/incremented'});
+  expect(subscriberMock).toHaveBeenCalledWith({value: 1});
+  store.dispatch({type: 'counter/incremented'});
+  expect(subscriberMock).toHaveBeenCalledWith({value: 2});
+  store.dispatch({type: 'counter/decremented'});
+  expect(subscriberMock).toHaveBeenCalledWith({value: 1});
+});

packages/vomjs-store/src/store.js

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+export default class Store {
+  constructor(dispatcher) {
+    this.$id = -1;
+    this.$dispatcher = dispatcher;
+    this.$callbacks = new Map;
+    this.$changed = false;
+
+    dispatcher.register(payload => this.onDispatch(payload));
+  }
+
+  addListener(callback) {
+    this.$id = this.$dispatcher.register(callback);
+    return {
+      remove: this.$dispatcher.unregister.bind(this.$dispatcher, this.$id)
+    };
+  }
+
+  getDispatcher() {
+    return this.$dispatcher;
+  }
+
+  getDispatchToken() {
+    return this.$id;
+  }
+
+  hasChanged() {
+    return this.$changed;
+  }
+
+  _emitChange() {
+    this.$changed = true;
+  }
+
+  /* eslint-disable-next-line no-unused-vars */
+  onDispatch(payload) {
+    throw new Error('subclasses must override onDispatch()');
+  }
+}