{"id":17785,"date":"2019-02-08T10:30:00","date_gmt":"2019-02-08T01:30:00","guid":{"rendered":"https:\/\/labs.gree.jp\/blog\/?p=17785"},"modified":"2019-02-08T10:41:02","modified_gmt":"2019-02-08T01:41:02","slug":"strict-event-emitter-types%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%9fsocket-io%e3%81%ae%e5%8e%b3%e5%af%86%e3%81%aa%e5%9e%8b%e5%ae%9a%e7%be%a9","status":"publish","type":"post","link":"https:\/\/labs.gree.jp\/blog\/2019\/02\/17785\/","title":{"rendered":"strict-event-emitter-types\u3092\u4f7f\u3063\u305fSocket.IO\u306e\u53b3\u5bc6\u306a\u578b\u5b9a\u7fa9"},"content":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001WFS\u3067\u30b5\u30fc\u30d0\u30b5\u30a4\u30c9\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u85e4\u7530\u3067\u3059\u3002<\/p>\n<p>\u6700\u8fd1\u3001\u30b2\u30fc\u30e0\u30b5\u30fc\u30d0\u306e\u8ca0\u8377\u691c\u8a3c\u30c4\u30fc\u30eb\u3092\u3064\u304f\u3063\u3066\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u3053\u3067\u3001\u30de\u30b9\u30bf\u30fc\u30b9\u30ec\u30fc\u30d6\u69cb\u6210\u3092\u4f5c\u308b\u305f\u3081\u306bTypeScript + Socket.IO\u3092\u4f7f\u3063\u3066\u307f\u305f\u3089\u3001\u601d\u3063\u3066\u3044\u305f\u3053\u3068\u304c\u7c21\u5358\u306b\u3067\u304d\u3066\u611f\u52d5\u3057\u305f\u306e\u3067\u3001\u7d39\u4ecb\u3067\u304d\u308c\u3070\u3068\u601d\u3044\u3001\u3053\u306e\u30a8\u30f3\u30c8\u30ea\u3092\u66f8\u3044\u3066\u307f\u307e\u3057\u305f\u3002<\/p>\n<h2>\u5bfe\u8c61\u306e\u8aad\u8005<\/h2>\n<p>TypeScript\u3092\u4f7f\u3063\u3066\u3044\u3066\u3001Socket.IO\u306a\u3069\u306eEventEmitter API\u3092\u3082\u3063\u305f\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u6271\u3046\u65b9<\/p>\n<h2>strict-event-emitter-types<\/h2>\n<p>TypeScript\u3067Socket.IO\u3092\u4f7f\u3046\u4ee5\u4e0a\u3001\u30a4\u30d9\u30f3\u30c8\u306b\u578b\u3092\u3064\u3051\u305f\u3044\u3068\u306f\u601d\u3063\u3066\u3044\u305f\u306e\u3067\u3059\u304c\u3001\u81ea\u529b\u3067\u8a66\u884c\u932f\u8aa4\u3057\u3066\u3044\u308b\u3068\u6848\u5916\u4e0a\u624b\u306b\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002<\/p>\n<p>\u305d\u308c\u3067\u63a2\u3057\u3066\u307f\u308b\u3068\u3001strict-event-emitter-types\u3068\u3044\u3046\u30d1\u30c3\u30b1\u30fc\u30b8\u304c\u5b9f\u73fe\u3057\u3066\u304f\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n<p><a href=\"https:\/\/github.com\/bterlson\/strict-event-emitter-types\">https:\/\/github.com\/bterlson\/strict-event-emitter-types<\/a><\/p>\n<p>README\u306b\u8f09\u3063\u3066\u3044\u308bExample\u3092\u898b\u3066\u3044\u305f\u3060\u304d\u305f\u3044\u306e\u3067\u3059\u304c\u3001<\/p>\n<ul>\n<li>\u578b\u5ba3\u8a00\u3060\u3051\u3067\u5b9f\u88c5\u3057\u3066\u3044\u308b\u306e\u3067\u5b9f\u884c\u6642\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u7121\u3044<\/li>\n<li>1\u3064\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3067\u5ba3\u8a00\u3057\u305f\u30a4\u30d9\u30f3\u30c8\u5b9a\u7fa9\u3067\u3001on\u3001emit\u3001once\u3001addEventListener\u306a\u3069\u306eEventEmitter API\u304c\u578b\u4ed8\u304d\u3067\u5b9a\u7fa9\u3055\u308c\u308b<\/li>\n<li>\u8907\u6570\u306e\u30a4\u30d9\u30f3\u30c8\u30da\u30a4\u30ed\u30fc\u30c9\u306b\u578b\u304c\u5b9a\u7fa9\u3067\u304d\u308b<\/li>\n<li>\u672a\u5b9a\u7fa9\u30a4\u30d9\u30f3\u30c8\u304c\u30a8\u30e9\u30fc\u306b\u306a\u308b<\/li>\n<\/ul>\n<p>\u3068\u3044\u3046\u3001\u3044\u307e\u307e\u3067TypeScript\u3067\u96e3\u3057\u304b\u3063\u305f\u3053\u3068\u304c\u5b9f\u73fe\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u7279\u306b\u3001\u8907\u6570\u30a4\u30d9\u30f3\u30c8\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u578b\u5b9a\u7fa9\u306f\u3001TypeScript 3.0\u304b\u3089\u5c0e\u5165\u3055\u308c\u305f<a href=\"https:\/\/www.typescriptlang.org\/docs\/handbook\/release-notes\/typescript-3-0.html#tuples-in-rest-parameters-and-spread-expressions\"><em>Tuples in rest parameters and spread expressions<\/em><\/a>\u306b\u3088\u3063\u3066\u5b9f\u73fe\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u305f\u3082\u306e\u3067\u3059\u3002<\/p>\n<p>\u8a66\u3057\u306b\u3001Intellij Idea\u3067\u5148\u307b\u3069\u306eExample\u3092\u7de8\u96c6\u3057\u3066\u307f\u305f\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u304c\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u898b\u3084\u3059\u3044\u3088\u3046\u306b\u5c11\u3057\u5909\u66f4\u3057\u3066\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/strict-event-emitter-types-screenshot2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-17789\" src=\"https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/strict-event-emitter-types-screenshot2-566x400.png\" alt=\"\" width=\"566\" height=\"400\" srcset=\"https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/strict-event-emitter-types-screenshot2-566x400.png 566w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/strict-event-emitter-types-screenshot2-276x195.png 276w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/strict-event-emitter-types-screenshot2-768x542.png 768w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/strict-event-emitter-types-screenshot2-830x586.png 830w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/strict-event-emitter-types-screenshot2.png 1151w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p>\u3053\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u3067\u3082\u3001\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u6b32\u3057\u3044\u3068\u3053\u308d\u304c\u30a8\u30e9\u30fc\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u3084\u3001\u30a4\u30d9\u30f3\u30c8\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u578b\u63a8\u8ad6\u304c\u52b9\u3044\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<h2>\u4f7f\u7528\u65b9\u6cd5<\/h2>\n<p>\u7c21\u5358\u306b\u4f7f\u3044\u65b9\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h4>\u5b9a\u7fa9\u3057\u305f\u3044\u30a4\u30d9\u30f3\u30c8<\/h4>\n<p>\u3042\u308bEventEmitter\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306b\u4ee5\u4e0b\u306e\u69d8\u306a\u30a4\u30d9\u30f3\u30c8\u3092\u5b9a\u7fa9\u3057\u305f\u3044\u3068\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true\">ee.emit('multiple_payloads', 1, \"alice\", true);\nee.on('multiple_payloads', (count: number, name: string, flag: boolean) =&gt; {});\nee.emit('no_payload');\nee.on('no_payload', () =&gt; {});\nee.emit('one_payload', 1);\nee.on('one_payload', (count: number) =&gt; {});<\/pre>\n<h4>\u30a4\u30d9\u30f3\u30c8\u30ec\u30b3\u30fc\u30c9\u3092\u5b9a\u7fa9\u3059\u308b<\/h4>\n<p>\u307e\u305a\u3001\u4ee5\u4e0b\u306e\u69d8\u306b\u30a4\u30d9\u30f3\u30c8\u30ec\u30b3\u30fc\u30c9\u3068\u547c\u3070\u308c\u308b\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true \">interface EventRecords {\n    multiple_payloads: (count: number, name: string, flag: boolean) =&gt; void;\n    no_payload: void; \/\/ () =&gt; void;\n    one_payload: number; \/\/ (count: number) =&gt; void;\n}<\/pre>\n<p>\u30a4\u30d9\u30f3\u30c8\u540d\u3068\u30a4\u30d9\u30f3\u30c8\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u30de\u30c3\u30d7\u3067\u3059\u3002<\/p>\n<p>\u57fa\u672c\u306f\u3001\u30a4\u30d9\u30f3\u30c8\u540d\u3068\u95a2\u6570\u578b\u306e\u30de\u30c3\u30d7\u3067\u3001\u8907\u6570\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u578b\u3092\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4e0a\u8a18\u3067\u306fmultiple_payloads\u304c\u8a72\u5f53\u3057\u307e\u3059\u3002<\/p>\n<p>\u3082\u3057\u3001\u30da\u30a4\u30ed\u30fc\u30c9\u304c\u7121\u3044\u30a4\u30d9\u30f3\u30c8\u3067\u3042\u308c\u3070\u3001no_payload\u306e\u69d8\u306b\u3001\u5358\u306bvoid\u3068\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001\u3082\u30571\u3064\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u3057\u304b\u306a\u3044\u306e\u3067\u3042\u308c\u3070\u3001one_payload\u306e\u69d8\u306b\u3001\u305d\u306e\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u578b\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4>\u578b\u4ed8\u304dEventEmitter\u3092\u5b9a\u7fa9\u3059\u308b<\/h4>\n<pre class=\"lang:js decode:true\">import StrictEventEmitter from 'strict-event-emitter-types';\n\n\/\/ \u76ee\u7684\u306eEventEmitter\nimport { EventEmitter } from 'events';\n\n\/\/ \u578b\u4ed8\u304d\u306eEventEmitter\u3092\u5b9a\u7fa9\ntype MyEventEmitterType = StrictEventEmitter&lt;EventEmitter, EventRecords&gt;;\n\nconst ee: MyEventEmitterType = new EventEmitter();<\/pre>\n<p>StrictEventEmitter\u306e\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306e1\u3064\u76ee\u306b\u81ea\u5206\u304c\u4f7f\u3044\u305f\u3044EventEmitter\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u578b\u3092\u30012\u3064\u76ee\u306b\u5148\u307b\u3069\u5b9a\u7fa9\u3057\u305f\u30a4\u30d9\u30f3\u30c8\u30ec\u30b3\u30fc\u30c9\u306e\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u3092\u6e21\u3057\u307e\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3001\u4f5c\u6210\u3057\u305fEventEmitter\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u683c\u7d0d\u3057\u305f\u5909\u6570\u3092\u578b\u4ed8\u3051\u3057\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u3001MyEventEmitter\u306f\u5358\u306a\u308b\u578b\u5b9a\u7fa9\u3067\u3059\u306e\u3067\u3001<\/p>\n<pre class=\"lang:js decode:true\">const ee = new MyEventEmitterType();<\/pre>\n<p>\u306e\u3088\u3046\u306a\u4f7f\u3044\u65b9\u306f\u3057\u307e\u305b\u3093\u3002<\/p>\n<p>\u3053\u308c\u3067\u3001\u6700\u521d\u306b\u60f3\u5b9a\u3057\u305fmultiple_payloads\u3001no_payload\u3001one_payload\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u578b\u4ed8\u304d\u3067\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h4>EventEmitter\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u3059\u308b<\/h4>\n<p>\u3088\u304f\u3042\u308b\u3001EventEmitter\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u3092\u5b9f\u88c5\u3059\u308b\u5834\u5408\u3082\u7c21\u5358\u306b\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true\">class MyEventEmitter extends (EventEmitter as { new(): MyEventEmitterType }) {\n  doEmit() {\n    this.emit('multiple_payloads', 1, \"alice\", true);\n  }\n}<\/pre>\n<p>\u3053\u306e\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u3067\u3001EventEmitter\u3092\u7d99\u627f\u3057\u305f\u30af\u30e9\u30b9\u3067\u3082\u3001\u578b\u4ed8\u304d\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u5b9f\u88c5\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h2>\u975e\u5bfe\u79f0\u30a4\u30d9\u30f3\u30c8<\/h2>\n<p>\u3055\u3089\u306b\u3001strict-event-emitter-types\u3067\u306f\u3001\u9001\u308b\u30a4\u30d9\u30f3\u30c8\u3068\u53d7\u3051\u53d6\u308b\u30a4\u30d9\u30f3\u30c8\u3092\u5225\u3005\u306b\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u3064\u307e\u308a\u3001Socket.IO\u306e\u3088\u3046\u306b\u3001\u30b5\u30fc\u30d0\u304b\u3089\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3078\u9001\u308a\u305f\u3044\u30a4\u30d9\u30f3\u30c8\u3068\u3001\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u30b5\u30fc\u30d0\u3078\u9001\u308a\u305f\u3044\u30a4\u30d9\u30f3\u30c8\u304c\u5225\u3005\u306b\u5b9f\u88c5\u3055\u308c\u308b\u5834\u5408\u306b\u5bfe\u5fdc\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306b\u5b9f\u88c5\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"lang:js decode:true\">import * as SocketIOClient from 'socket.io-client';\nimport * as SocketIO from 'socket.io';\nimport StrictEventEmitter from 'strict-event-emitter-types';\n\n\/\/ \u5171\u901a\u30a4\u30d9\u30f3\u30c8\ninterface CommonEvents {\n    common1: (foo: number) =&gt; void;\n}\n\n\/\/ \u30b5\u30fc\u30d0\u304b\u3089\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3078\ninterface EventsFromServer extends CommonEvents {\n    sameName: (name: string, str: string) =&gt; void;\n    server1: () =&gt; void;\n}\n\n\/\/ \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u304b\u3089\u30b5\u30fc\u30d0\u3078\ninterface EventsFromClient extends CommonEvents {\n    sameName: (name: string, num: number) =&gt; void;\n    client1: (name: string) =&gt; void;\n}\n\n\/\/ \u30b5\u30fc\u30d0\u30b5\u30a4\u30c9\n\n\/\/ \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u901a\u4fe1\u3059\u308b\u30bd\u30b1\u30c3\u30c8\u306e\u5b9a\u7fa9\ntype ClientSocket = StrictEventEmitter&lt;SocketIOClient.Socket, EventsFromClient, EventsFromServer&gt;;\n\nconst io = SocketIO();\nio.on('connection', (clientSocket: ClientSocket \/* \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3068\u901a\u4fe1\u3059\u308b\u30bd\u30b1\u30c3\u30c8 *\/) =&gt; {\n\n    \/\/ OK!\n\n    \/\/ \u7d99\u627f\u3057\u305f\u5171\u901a\u30a4\u30d9\u30f3\u30c8\n    clientSocket.emit('common1', 1);\n\n    \/\/ \u500b\u5225\u30a4\u30d9\u30f3\u30c8\n    clientSocket.on('common1', (foo: number) =&gt; {});\n    clientSocket.emit('sameName', 'name', '1');\n    clientSocket.on('sameName', (name: string, num: number) =&gt; {});\n    clientSocket.emit('server1');\n    clientSocket.on('client1', (name: string) =&gt; {});\n\n    \/\/ NG...\n\n    \/\/ ClientSocket\u304b\u3089\u9001\u308b\u30a4\u30d9\u30f3\u30c8\u5b9a\u7fa9\u3068\u306f\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u578b\u304c\u7570\u306a\u308b\n    clientSocket.emit('sameName', 'name', 1);\n\n    \/\/ ClientSocket\u304c\u53d7\u3051\u53d6\u308b\u30a4\u30d9\u30f3\u30c8\u5b9a\u7fa9\u3068\u306f\u7570\u306a\u308b\n    clientSocket.on('sameName', (name: string, str: string) =&gt; {});\n\n    \/\/ ClientSocket\u5074\u3067\u306f\u5b9a\u7fa9\u3057\u3066\u3044\u306a\u3044\n    clientSocket.on('server1', () =&gt; {});\n\n    \/\/ ClientSocket\u5074\u3067\u306f\u5b9a\u7fa9\u3057\u3066\u3044\u306a\u3044\n    clientSocket.emit('client1', 'name');\n});\n\n\/\/ \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\n\n\/\/ \u30b5\u30fc\u30d0\u3068\u901a\u4fe1\u3059\u308b\u30bd\u30b1\u30c3\u30c8\u306e\u5b9a\u7fa9\ntype ServerSocket = StrictEventEmitter&lt;SocketIO.Socket, EventsFromServer, EventsFromClient&gt;;\n\n\/\/ \u30b5\u30fc\u30d0\u3068\u901a\u4fe1\u3059\u308b\u30bd\u30b1\u30c3\u30c8\nconst serverSocket: ServerSocket = new SocketIOClient.Socket();\n\n\/\/ OK!\n\n\/\/ \u7d99\u627f\u3057\u305f\u5171\u901a\u30a4\u30d9\u30f3\u30c8\naserverSocket.emit('common1', 1);\n\n\/\/ \u500b\u5225\u30a4\u30d9\u30f3\u30c8\nserverSocket.on('common1', (foo: number) =&gt; {});\nserverSocket.emit('sameName', 'name', 1);\nserverSocket.on('sameName', (name: string, str: string) =&gt; {});\nserverSocket.on('server1', () =&gt; {});\nserverSocket.emit('client1', 'name');\n\n\/\/ NG...\n\n\/\/ ServerSocket\u304b\u3089\u9001\u308b\u30a4\u30d9\u30f3\u30c8\u5b9a\u7fa9\u3068\u306f\u30da\u30a4\u30ed\u30fc\u30c9\u306e\u578b\u304c\u7570\u306a\u308b\nserverSocket.emit('sameName', 'name', '1');\n\n\/\/ ServerSocket\u304c\u53d7\u3051\u53d6\u308b\u30a4\u30d9\u30f3\u30c8\u5b9a\u7fa9\u3068\u306f\u7570\u306a\u308b\nserverSocket.on('sameName', (name: string, num: number) =&gt; {});\n\n\/\/ ServerSocket\u5074\u3067\u306f\u5b9a\u7fa9\u3057\u3066\u3044\u306a\u3044\nserverSocket.emit('server1'); \/\/\n\n\/\/ ServerSocket\u5074\u3067\u306f\u5b9a\u7fa9\u3057\u3066\u3044\u306a\u3044\nserverSocket.on('client1', (name: string) =&gt; {});<\/pre>\n<p>&nbsp;<\/p>\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306b\u3001\u30b5\u30fc\u30d0\u5074\u306e\u30a4\u30d9\u30f3\u30c8\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u306e\u30a4\u30d9\u30f3\u30c8\u3092\u5225\u3005\u306b\u5b9a\u7fa9\u3057\u3001\u30b5\u30fc\u30d0\/\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u305d\u308c\u305e\u308c\u306e\u30bd\u30b1\u30c3\u30c8\u5f62\u306e\u30b8\u30a7\u30cd\u30ea\u30af\u30b9\u306b\u53cd\u5bfe\u306b\u3057\u3066\u6e21\u3057\u3066\u3042\u3052\u308b\u3053\u3068\u3067\u3001\u30b5\u30fc\u30d0\u5074\u30bd\u30b1\u30c3\u30c8\u3068\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u5074\u30bd\u30b1\u30c3\u30c8\u304c\u77db\u76fe\u306a\u304fon\u3068emit\u3092\u5bfe\u5fdc\u3065\u3051\u3089\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u3053\u3061\u3089\u3082\u3001\u4e00\u90e8\u306e\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8\u3092\u8f09\u305b\u307e\u3059\u3002<\/p>\n<p><a href=\"https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/socket-io-screenshot3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-17813\" src=\"https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/socket-io-screenshot3-532x400.png\" alt=\"\" width=\"532\" height=\"400\" srcset=\"https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/socket-io-screenshot3-532x400.png 532w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/socket-io-screenshot3-266x200.png 266w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/socket-io-screenshot3-768x577.png 768w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/socket-io-screenshot3-830x624.png 830w, https:\/\/labs.gree.jp\/blog\/wp-content\/uploads\/2019\/02\/socket-io-screenshot3.png 1027w\" sizes=\"auto, (max-width: 532px) 100vw, 532px\" \/><\/a><\/p>\n<h2>\u5236\u9650<\/h2>\n<p>Socket.IO\u306f\u3001<a href=\"https:\/\/www.npmjs.com\/package\/@types\/socket.io\">@types\/socket.io<\/a>\u3068<a href=\"https:\/\/www.npmjs.com\/package\/@types\/socket.io-client\">@types\/socket.io-client<\/a>\u306eTypeScript\u5411\u3051\u578b\u5b9a\u7fa9\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u4e2d\u3067\u5b9a\u7fa9\u3057\u3066\u3042\u308b<em>connected<\/em>\u3084<em>disconnected<\/em>\u306a\u3069\u3068\u3044\u3063\u305f\u7d44\u307f\u8fbc\u307f\u30a4\u30d9\u30f3\u30c8\u306e\u5b9a\u7fa9\u304c\u7121\u304f\u306a\u308b\u305f\u3081\u3001\u518d\u5b9a\u7fa9\u3057\u3066\u3042\u3052\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3057\u305f\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u4eca\u56de\u306f\u3001EventEmitter\u306b\u578b\u3092\u3064\u3051\u308bstrict-event-emitter-types\u306e\u7d39\u4ecb\u3068\u3001\u305d\u308c\u3092Socket.IO\u3067\u4f7f\u3063\u305f\u7c21\u5358\u306a\u4f8b\u3092\u793a\u3057\u307e\u3057\u305f\u3002<\/p>\n<p>\u4ee5\u524d\u306b Socket.IO \u3092\u304c\u3063\u3064\u308a\u4f7f\u3063\u3066\u3044\u305f\u9803\u306f\u3001\u5b9f\u884c\u6642\u306b\u306a\u3063\u3066\u5224\u660e\u3059\u308b\u521d\u6b69\u7684\u306atypo\u3084\u30da\u30a4\u30ed\u30fc\u30c9\u30df\u30b9\u3092\u305a\u3044\u3076\u3093\u3084\u3063\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u3053\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u306b\u3088\u3063\u3066\u3001IDE\u3084\u30b3\u30f3\u30d1\u30a4\u30e9\u306e\u30b5\u30dd\u30fc\u30c8\u3092\u5341\u5206\u306b\u53d7\u3051\u3066\u5b9f\u88c5\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u305d\u3046\u3067\u3059\u3002<\/p>\n<p>\u3068\u308a\u3042\u3048\u305a\u306f\u3001\u305d\u3082\u305d\u3082\u306e\u767a\u7aef\u3067\u3042\u308b\u8ca0\u8377\u691c\u8a3c\u30c4\u30fc\u30eb\u306e\u958b\u767a\u3067\u6d3b\u7528\u3057\u3001\u5f62\u306b\u306a\u308a\u307e\u3057\u305f\u3089\u307e\u305f\u3053\u3053\u3067\u7d39\u4ecb\u3055\u305b\u3066\u3044\u305f\u3060\u3051\u305f\u3089\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u3001strict-event-emitter-types\u306e\u4e2d\u8eab\u306f\u3001TypeScript 2.8\u3067\u5c0e\u5165\u3055\u308c\u305f<em>Conditional Types<\/em>\u3084\u3001TypeScript 3.0\u3067\u5c0e\u5165\u3055\u308c\u305f<em>Tuples in rest parameters and spread expressions<\/em>\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u8907\u96d1\u306a\u578b\u5b9a\u7fa9\u306e\u584a\u3067\u3059\u3002\u3068\u3066\u3082\u9762\u767d\u3044\u306e\u3067\u3001TypeScript\u306e\u6700\u65b0\u6a5f\u80fd\u306b\u8208\u5473\u304c\u3042\u308b\u65b9\u306f\u306e\u305e\u3044\u3066\u307f\u308c\u3070\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u3067\u306f\u3001\u3088\u3044TypeScript\u30e9\u30a4\u30d5\u3092\u3002<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u3093\u306b\u3061\u306f\u3001WFS\u3067\u30b5\u30fc\u30d0\u30b5\u30a4\u30c9\u3092\u62c5\u5f53\u3057\u3066\u3044\u308b\u85e4\u7530\u3067\u3059\u3002 \u6700\u8fd1\u3001\u30b2\u30fc\u30e0\u30b5\u30fc\u30d0\u306e\u8ca0\u8377\u691c\u8a3c\u30c4\u30fc\u30eb\u3092\u3064\u304f\u3063\u3066\u308b\u306e\u3067\u3059\u304c\u3001\u305d\u3053\u3067\u3001\u30de\u30b9\u30bf\u30fc\u30b9\u30ec\u30fc\u30d6\u69cb\u6210\u3092\u4f5c\u308b\u305f\u3081\u306bTypeScript + Socket.IO\u3092\u4f7f\u3063\u3066\u307f\u305f\u3089\u3001\u601d\u3063\u3066 [&hellip;]<\/p>\n","protected":false},"author":118,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[159],"class_list":["post-17785","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","tag-typescript"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/posts\/17785","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/users\/118"}],"replies":[{"embeddable":true,"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/comments?post=17785"}],"version-history":[{"count":3,"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/posts\/17785\/revisions"}],"predecessor-version":[{"id":17822,"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/posts\/17785\/revisions\/17822"}],"wp:attachment":[{"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/media?parent=17785"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/categories?post=17785"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/labs.gree.jp\/blog\/wp-json\/wp\/v2\/tags?post=17785"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}