![\"\"](\"https:\/\/weseek.co.jp\/tech\/wp-content\/uploads\/2021\/11\/617bab3d7aa1b7b8ed956b8c.gif\")
<\/p>\n\u3053\u306e\u6295\u7a3f\u306f\u3001\u5f0a\u793e\u304c\u63d0\u4f9b\u3059\u308bWESEEK TECH\u901a\u4fe1\u306e\u4e00\u74b0\u3067\u3059\u3002<\/p>\n
WESEEK TECH\u901a\u4fe1\u3068\u306f\u3001WESEEK\u306e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u30ad\u30e3\u30c3\u30c1\u30a2\u30c3\u30d7\u3057\u305f\u6280\u8853\u306b\u95a2\u3059\u308b\u60c5\u5831\u3092\u3001tech\u30d6\u30ed\u30b0\u3092\u901a\u3058\u3066\u5b9a\u671f\u7684\u306b\u767a\u4fe1\u3057\u3066\u3044\u304f\u3082\u306e\u3067\u3059\u3002<\/p>\n
<\/p>\n\n
\u3053\u3093\u306b\u3061\u306f\uff01WESEEK\u30a4\u30f3\u30bf\u30fc\u30f3\u306e\u5bae\u6ca2\u3067\u3059\u3002\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306fJavascript\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3042\u308bSocket.io\u3092\u7528\u3044\u3066\u7c21\u5358\u306a\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u3092\u4f5c\u3063\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
<\/p>\n
<\/p>\n
\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u306b\u3088\u308b\u3068\u3001\u300c\u3042\u3089\u3086\u308b\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u5bfe\u5fdc\u3057\u305f\u53cc\u65b9\u5411\u30fb\u4f4e\u30ec\u30a4\u30c6\u30f3\u30b7\u30fc\u901a\u4fe1\uff08\u57f7\u7b46\u8005\u8a33\uff09\u300d\u3068\u3042\u308a\u307e\u3059\u3002Socket.io\u306f\u3001\u4e3b\u306bWebsocket\u3092\u4f7f\u3063\u3066\u52d5\u4f5c\u3057\u307e\u3059\u3002Node.js\u4e0a\u3067\u52d5\u4f5c\u3059\u308b\u30b5\u30fc\u30d0\u30fc\u30b5\u30a4\u30c9\u30e9\u30a4\u30d6\u30e9\u30ea\u3001\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u52d5\u4f5c\u3059\u308b\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u63d0\u4f9b\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n WebSocket\u306f\u30b5\u30fc\u30d0\u30fc\u30fb\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u9593\u3092\u30a4\u30d9\u30f3\u30c8\u99c6\u52d5\u3067\u53cc\u65b9\u5411\u306b\u901a\u4fe1\u3092\u53ef\u80fd\u306b\u3059\u308b\u6280\u8853\u3067\u3059\u3002Web\u901a\u4fe1\u3068\u8a00\u3048\u3070HTTP\u3068\u3044\u3046\u30d7\u30ed\u30c8\u30b3\u30eb\u3092\u3088\u304f\u8033\u306b\u3059\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u3053\u308c\u306f1\u3064\u306e\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u30671\u3064\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3057\u304b\u9001\u308b\u3053\u3068\u304c\u3067\u304d\u306a\u3044\u305f\u3081\u3001\u65b0\u3057\u3044\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306b\u306f\u30da\u30fc\u30b8\u3092\u30ea\u30ed\u30fc\u30c9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u3084SNS\u306a\u3069\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u60c5\u5831\u3092\u53d6\u5f97\u3057\u305f\u3044\u5834\u5408\u3053\u308c\u306f\u4e0d\u5411\u304d\u3067\u3059\u3002\u5bfe\u3057\u3066Websocket\u306f\u30b5\u30fc\u30d0\u30fc\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304c\u4e00\u5ea6\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u3092\u884c\u3048\u3070\u30ea\u30a2\u30eb\u30bf\u30a4\u30e0\u306b\u60c5\u5831\u306e\u3084\u308a\u3068\u308a\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n \u4eca\u56de\u306fSocket.Io\u306e\u4e2d\u3067\u3082\u57fa\u672c\u7684\u306a\u30e1\u30bd\u30c3\u30c9\u3067\u3042\u308b \u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u3092\u4f5c\u6210\u3059\u308b\u306b\u3042\u305f\u308a\u3001\u5fc5\u8981\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3001\u30d5\u30a1\u30a4\u30eb\u3001\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u3092\u7528\u610f\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n \u4e0b\u8a18\u306e\u3088\u3046\u306a\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30fc\u3001\u30d5\u30a1\u30a4\u30eb\u3092\u7528\u610f\u3057\u307e\u3059\u3002<\/p>\n package.json\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a18\u8ff0\u3057\u307e\u3059\u3002\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u3067\u5fc5\u8981\u306b\u306a\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\uff08express\u3068socket.io\uff09\u3092"dependencies"\u306b\u5165\u308c\u3066\u3042\u308a\u307e\u3059\u3002<\/p>\n \u5fc5\u8981\u306a\u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u884c\u3044\u307e\u3059\u3002node\u3001npm\u3001yarn\u304c\u81ea\u5206\u306e\u74b0\u5883\u306b\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n \u3055\u3063\u305d\u304f\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u3092\u4f5c\u6210\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n \u7de8\u96c6\u3059\u308b\u30d5\u30a1\u30a4\u30eb\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n \u307e\u305a\u306fexpress\u3092\u4f7f\u3063\u3066\u30b5\u30fc\u30d0\u30fc\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n index.js<\/p>\n index.html<\/p>\n \u30bf\u30fc\u30df\u30ca\u30eb\u3092\u958b\u3044\u3066\u30b5\u30fc\u30d0\u30fc\u3092\u8d77\u52d5\u3057\u307e\u3059\u3002<\/p>\n \u30b5\u30fc\u30d0\u30fc\u5074\u306b\u306f \u6b21\u306bSocket.io\u306e\u51e6\u7406\u3092\u8a18\u8ff0\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n index.js<\/p>\n index.html <\/p>\n \u30b5\u30fc\u30d0\u30fc\u3092\u518d\u8d77\u52d5\u3001localhost:3000\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u3068\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u30ed\u30b0\u306b \u7d9a\u3044\u3066\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u3067input\u306b\u30c6\u30ad\u30b9\u30c8\u3092\u5165\u529b\u3001\u9001\u4fe1\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3068\u30b5\u30fc\u30d0\u30fc\u5074\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\u3059\u308b\u30a4\u30d9\u30f3\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<\/p>\n index.js<\/p>\n index.html<\/p>\n \u30b5\u30fc\u30d0\u30fc\u3092\u518d\u8d77\u52d5\u3001localhost:3000\u306b\u30a2\u30af\u30bb\u30b9\u3057\u307e\u3059\u3002input\u306b\u9069\u5f53\u306a\u6587\u5b57\u5217\u3092\u5165\u529b\u3001\u9001\u4fe1\u30dc\u30f3\u30bf\u30f3\u3092\u62bc\u3059\u3068\u30b5\u30fc\u30d0\u30fc\u5074\u306b\u5165\u529b\u3055\u308c\u305f\u6587\u5b57\u5217\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n \u6700\u5f8c\u306b\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u5168\u3066\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5bfe\u3057\u3066\u5165\u529b\u3057\u305f\u6587\u5b57\u5217\u3092\u8868\u793a\u3067\u304d\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002<\/p>\n index.js<\/p>\n index.html<\/p>\n \u672c\u8a18\u4e8b\u5192\u982d\u306egif\u306e\u3088\u3046\u306a\u6319\u52d5\u306b\u306a\u3063\u305f\u3089\u5b8c\u6210\u3067\u3059\uff01\u304a\u75b2\u308c\u69d8\u3067\u3057\u305f\u3002\u4eca\u56de\u6271\u3063\u305f\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306f\u3001github<\/a>\u306b\u4e0a\u3052\u3066\u3042\u308b\u306e\u3067\u3001\u30af\u30ed\u30fc\u30f3\u3057\u3066\u6c17\u8efd\u306b\u7acb\u3061\u4e0a\u3052\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\non()<\/code> \u3068 emit()<\/code> \u306e\u307f\u306b\u7d5e\u3063\u3066\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n\/\/ \u30b5\u30fc\u30d0\u30fc\nio.on("connection", (socket) => {\n \/\/ "hello" \u3068\u3044\u3046\u30a4\u30d9\u30f3\u30c8\u3092\u767a\u706b\u3055\u305b\u3001"world" \u3068\u3044\u3046\u6587\u5b57\u5217\u3092\u9001\u4fe1\u3059\u308b\n socket.emit("hello", "world");\n});\n\n\/\/ \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\n\/\/ "hello" \u3068\u3044\u3046\u30a4\u30d9\u30f3\u30c8\u3092\u53d7\u4fe1\u3067\u304d\u308b\u3088\u3046\u306b\u3059\u308b\n\/\/ \u53d6\u5f97\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u51fa\u529b\u3059\u308b\nsocket.on("hello", (message) => {\n console.log(message);\n});<\/code><\/pre>\n\u74b0\u5883\u69cb\u7bc9<\/h2>\n
simple_chat\/\n \u251c\u2500\u2500 package.json\n \u2514\u2500\u2500 src\n \u251c\u2500\u2500 index.html\n \u2514\u2500\u2500 index.js<\/code><\/pre>\n{\n "name": "simple_chat",\n "version": "1.0.0",\n "main": "index.js",\n "license": "MIT",\n "dependencies": {\n "express": "^4.17.1",\n "socket.io": "^4.3.1"\n }\n}<\/code><\/pre>\n# simple_chat\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u306b\u5165\u308b\n$ cd simple_chat\n\n# \u30e9\u30a4\u30d6\u30e9\u30ea\u30fc\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\n$ yarn install<\/code><\/pre>\nsimple_chat<\/code>\u30c7\u30a3\u30ec\u30af\u30c8\u30ea\u30fc\u914d\u4e0b\u306b\u3001node_modules<\/code>\u3068yarn.lock<\/code>\u304c\u65b0\u305f\u306b\u8ffd\u52a0\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u3072\u3068\u307e\u305a\u3053\u308c\u3067\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u304c\u4f5c\u6210\u3067\u304d\u308b\u72b6\u614b\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\u30c1\u30e3\u30c3\u30c8\u30a2\u30d7\u30ea\u3092\u4f5c\u308b<\/h2>\n
\n
const express = require('express');\nconst http = require('http');\n\nconst app = express();\nconst server = http.Server(app);\n\nconst PORT = 3000;\n\n\/\/ \u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u306e\u8a2d\u5b9a\u3002'\/' \u306b\u30ea\u30af\u30a8\u30b9\u30c8\u304c\u3042\u3063\u305f\u5834\u5408 src\/index.html \u3092\u8fd4\u3059\napp.get('\/', (req, res) => {\n res.sendFile(__dirname + '\/index.html');\n});\n\n\/\/ 3000\u756a\u30dd\u30fc\u30c8\u3067HTTP\u30b5\u30fc\u30d0\u30fc\u3092\u8d77\u52d5\nserver.listen(PORT, () => {\n console.log(`listening on port ${PORT}`);\n});<\/code><\/pre>\n<html>\n <body>\n <h1>simple chat<\/h1>\n <input id="inputText" type="text">\n <input id="sendButton" type="submit">\n <ul id="messageList" \/>\n <\/body>\n<\/html><\/code><\/pre>\n$ node src\/index.js<\/code><\/p>\nlistening on port 3000<\/code> \u3068\u3044\u3046\u30ed\u30b0\u304c\u51fa\u529b\u3055\u308c\u3001\u30d6\u30e9\u30a6\u30b6\u3067 http:\/\/localhost:3000\/<\/a> \u3092\u958b\u304f\u3068 \u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n![\"\"](\"https:\/\/weseek.co.jp\/tech\/wp-content\/uploads\/2021\/11\/617b69f57aa1b79b71954fd5.png\")
<\/p>\nconst express = require('express');\nconst http = require('http');\n\n\/\/ Socket.io\u3092\u30a4\u30f3\u30dd\u30fc\u30c8\nconst socketIo = require('socket.io');\n\nconst app = express();\nconst server = http.Server(app);\n\n\/\/ \u521d\u671f\u5316\nconst io = socketIo(server);\n\nconst PORT = 3000;\n\napp.get('\/', (req, res) => {\n res.sendFile(__dirname + '\/index.html');\n});\n\nserver.listen(PORT, () => {\n console.log(`listening on port ${PORT}`);\n});\n\n\/\/ \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u306e\u30b3\u30cd\u30af\u30b7\u30e7\u30f3\u304c\u78ba\u7acb\u3057\u305f\u3089'connected'\u3068\u3044\u3046\u8868\u793a\u3055\u305b\u308b\nio.on('connection', (socket) => {\n console.log('connected');\n});<\/code><\/pre>\n<html> \n <body>\n <h1>simple chat<\/h1>\n <input id="inputText" type="text">\n <input id="sendButton" type="submit">\n <ul id="messageList" \/>\n\n <!-- \u30e9\u30a4\u30d6\u30e9\u30ea\u306e\u8aad\u307f\u8fbc\u307f -->\n <script src="\/socket.io\/socket.io.js"><\/script>\n <script>\n \/\/ \u30b5\u30fc\u30d0\u30fc\u3078\u63a5\u7d9a\n const socket = io();\n <\/script>\n <\/body>\n<\/html><\/code><\/pre>\nconnected<\/code>\u304c\u51fa\u529b\u3055\u308c\u3066\u3044\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\nconst express = require('express');\nconst http = require('http');\nconst socketIo = require('socket.io');\n\nconst app = express();\nconst server = http.Server(app);\nconst io = socketIo(server);\n\nconst PORT = 3000;\n\napp.get('\/', (req, res) => {\n res.sendFile(__dirname + '\/index.html');\n});\n\nserver.listen(PORT, () => {\n console.log(`listening on port ${PORT}`);\n});\n\nio.on('connection', (socket) => {\n console.log('user connected');\n\n \/\/ 'sendMessage' \u3068\u3044\u3046\u30a4\u30d9\u30f3\u30c8\u540d\u3067\u53d7\u4fe1\u3067\u304d\u308b\n \/\/ \u7b2c\u4e00\u5f15\u6570\u306b\u306f\u53d7\u4fe1\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u5165\u308a\u3001\u30ed\u30b0\u306b\u51fa\u529b\u3059\u308b\n socket.on('sendMessage', (message) => {\n console.log('Message has been sent: ', message);\n });\n});<\/code><\/pre>\n<html>\n <body>\n <h1>simple chat<\/h1>\n <input id="inputText" type="text">\n <input id="sendButton" type="submit">\n <ul id="messageList" \/>\n\n <script src="\/socket.io\/socket.io.js"><\/script>\n <script>\n\n const socket = io();\n\n const clearText = () => {\n document.getElementById('inputText').value = '';\n }\n\n \/\/ \u9001\u4fe1\u30dc\u30bf\u30f3\u306e\u30af\u30ea\u30c3\u30af\u30a4\u30d9\u30f3\u30c8\u3092\u691c\u77e5\n document.getElementById('sendButton').addEventListener('click', () => {\n\n \/\/ input\u306b\u5165\u529b\u3055\u308c\u305f\u30c6\u30ad\u30b9\u30c8\u3092\u53d6\u5f97\n let inputMessage = document.getElementById('inputText').value;\n\n if (inputMessage === '') {\n return;\n }\n\n \/\/ 'sendMessage' \u30a4\u30d9\u30f3\u30c8\u3092\u767a\u706b\u3001\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u9001\u4fe1\n socket.emit('sendMessage', inputMessage);\n\n \/\/ input \u5185\u306e\u30c6\u30ad\u30b9\u30c8\u3092\u7a7a\u306b\u3059\u308b\n clearText();\n });\n <\/script>\n <\/body>\n<\/html><\/code><\/pre>\n![\"\"](\"https:\/\/weseek.co.jp\/tech\/wp-content\/uploads\/2021\/11\/617ba3017aa1b7596b956357.gif\")
<\/p>\nconst express = require('express');\nconst http = require('http');\nconst socketIo = require('socket.io');\n\nconst app = express();\nconst server = http.Server(app);\nconst io = socketIo(server);\n\nconst PORT = 3000;\n\napp.get('\/', (req, res) => {\n res.sendFile(__dirname + '\/index.html');\n});\n\nserver.listen(PORT, () => {\n console.log(`listening on port ${PORT}`);\n});\n\nio.on('connection', (socket) => {\n console.log('user connected');\n socket.on('sendMessage', (message) => {\n console.log('Message has been sent: ', message);\n\n \/\/ 'receiveMessage' \u3068\u3044\u3046\u30a4\u30d9\u30f3\u30c8\u3092\u767a\u706b\u3001\u53d7\u4fe1\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u5168\u3066\u306e\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u306b\u5bfe\u3057\u3066\u9001\u4fe1\u3059\u308b\n io.emit('receiveMessage', message);\n });\n});<\/code><\/pre>\n<html>\n <body>\n <h1>simple chat<\/h1>\n <input id="inputText" type="text">\n <input id="sendButton" type="submit">\n <ul id="messageList" \/>\n\n <script src="\/socket.io\/socket.io.js"><\/script>\n <script>\n\n const socket = io();\n\n const clearText = () => {\n document.getElementById('inputText').value = '';\n }\n\n const addMessageList = (message) => {\n const ul = document.getElementById('messageList');\n const li = document.createElement('li');\n const text = document.createTextNode(message);\n li.appendChild(text);\n ul.appendChild(li);\n };\n\n document.getElementById('sendButton').addEventListener('click', () => {\n let inputMessage = document.getElementById('inputText').value;\n\n if (inputMessage === '') {\n return;\n }\n\n socket.emit('sendMessage', inputMessage);\n clearText();\n });\n\n \/\/ 'receiveMessage' \u30a4\u30d9\u30f3\u30c8\u306e\u767a\u706b\u3092\u691c\u77e5\n \/\/ \u7b2c\u4e00\u5f15\u6570\u306b\u306f\u53d7\u4fe1\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u5165\u308b\n socket.on('receiveMessage', (message) => {\n \/\/ \u53d7\u4fe1\u3057\u305f\u30e1\u30c3\u30bb\u30fc\u30b8\u3092ul\u30bf\u30b0\u306b\u633f\u5165\n addMessageList(message);\n });\n <\/script>\n <\/body>\n<\/html><\/code><\/pre>\n\u53c2\u8003\u306b\u3055\u305b\u3066\u3044\u305f\u3060\u3044\u305f\u8a18\u4e8b<\/h2>\n