{"id":1863,"date":"2019-05-07T19:03:59","date_gmt":"2019-05-07T10:03:59","guid":{"rendered":"https:\/\/lovelinux.mydns.jp\/?p=1863"},"modified":"2019-05-07T19:03:59","modified_gmt":"2019-05-07T10:03:59","slug":"create-react-app-%e3%81%a7%e4%bd%9c%e3%81%a3%e3%81%9f%e7%92%b0%e5%a2%83%e3%81%a7%e3%80%81productionstagingxxx%e3%81%aa%e3%81%a9%e3%82%92-process-env%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6%e5%88%87","status":"publish","type":"post","link":"https:\/\/lovelinux.mydns.jp\/?p=1863","title":{"rendered":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b"},"content":{"rendered":"<p>create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b<br \/>\n\u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb<\/p>\n<p>production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d\u3000\u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001<br \/>\nprocess.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002<\/p>\n<p>create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001<\/p>\n<p>\u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01<\/p>\n<p>\u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b<br \/>\nREACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002<\/p>\n<p>\u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002<\/p>\n<p>[bash]<br \/>\nlet const_HOST_ADDR;<br \/>\nlet const_WS_HOST_ADDR;<\/p>\n<p>if (process.env.REACT_APP_CURR_ENV === &#8220;production&#8221; ){<br \/>\n  const_HOST_ADDR = &#8220;https:\/\/myapp.jp&#8221;;<br \/>\n  const_WS_HOST_ADDR = &#8220;ws:\/\/myapp.jp&#8221;;<br \/>\n}<br \/>\nelse if (process.env.REACT_APP_CURR_ENV === &#8220;staging&#8221; ){<br \/>\n  const_HOST_ADDR = &#8220;https:\/\/stg.myapp.jp&#8221;;<br \/>\n  const_WS_HOST_ADDR = &#8220;ws:\/\/stg.myapp.jp&#8221;;<br \/>\n}<br \/>\nelse {<br \/>\n  const_HOST_ADDR = &#8220;http:\/\/localhost:4000&#8221;;<br \/>\n  const_WS_HOST_ADDR = &#8220;ws:\/\/localhost:4000&#8221;;<br \/>\n}<\/p>\n<p>export const HOST_ADDR = const_HOST_ADDR;<br \/>\nexport const WS_HOST_ADDR = const_WS_HOST_ADDR;<\/p>\n<p>[\/bash]<\/p>\n<p>package.json\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7de8\u96c6\u3057\u307e\u3059\u3002<\/p>\n<p>[bash]<\/p>\n<p>{<br \/>\n  &#8220;name&#8221;: &#8220;front&#8221;,<br \/>\n  &#8220;version&#8221;: &#8220;1.0.0&#8221;,<br \/>\n  &#8220;description&#8221;: &#8220;&#8221;,<br \/>\n  &#8220;main&#8221;: &#8220;index.js&#8221;,<br \/>\n  &#8220;scripts&#8221;: {<br \/>\n    &#8220;start&#8221;: &#8220;react-scripts start&#8221;,<br \/>\n    &#8220;build&#8221;: &#8220;REACT_APP_CURR_ENV=production react-scripts build&#8221;,<br \/>\n    &#8220;staging&#8221;: &#8220;REACT_APP_CURR_ENV=staging react-scripts build&#8221;,<br \/>\n    &#8220;test&#8221;: &#8220;react-scripts test&#8221;,<br \/>\n    &#8220;eject&#8221;: &#8220;react-scripts eject&#8221;<br \/>\n  },<br \/>\n\u3000\u3000\u3000\u30fb<br \/>\n\u3000\u3000\u3000\u30fb<br \/>\n\u3000\u3000\u3000\u4ee5\u4e0b\u7565<br \/>\n\u3000\u3000\u3000\u30fb<br \/>\n\u3000\u3000\u3000\u30fb<\/p>\n<p>[\/bash]<\/p>\n<p>production\u74b0\u5883\u306e\u30d3\u30eb\u30c9\u3092\u884c\u3044\u305f\u3044\u3068\u304d\u306f<\/p>\n<p>[bash]<br \/>\n$ npm run build<br \/>\n[\/bash]<\/p>\n<p>staging\u74b0\u5883\u306e\u30d3\u30eb\u30c9\u3092\u884c\u3044\u305f\u3044\u3068\u304d\u306f<\/p>\n<p>[bash]<br \/>\n$ npm run staging<br \/>\n[\/bash]<\/p>\n<p>\u3053\u308c\u3067\u3001\u3081\u3067\u305f\u3057\u3001\u3081\u3067\u305f\u3057\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d\u3000\u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === &#8220;production&#8221; ){ const_HOST_ADDR = &#8220;https:\/\/myapp.jp&#8221;; const_WS_HOST_ADDR = &#8220;ws:\/\/myapp.jp&#8221;; } else if (process.env.REACT_APP_CURR_ENV === &#8220;staging&#8221; ){ const_HOST_ADDR = &#8220;https:\/\/stg.myapp.jp&#8221;; const_WS_HOST_ADDR = &#8220;ws:\/\/stg.myapp.jp&#8221;; } else { const_HOST_ADDR = &#8220;http:\/\/localhost:4000&#8221;; const_WS_HOST_ADDR = &#8220;ws:\/\/localhost:4000&#8221;; } export const HOST_ADDR = const_HOST_ADDR; export const WS_HOST_ADDR = const_WS_HOST_ADDR; [\/bash] package.json\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7de8\u96c6\u3057\u307e\u3059\u3002 [bash] { &#8220;name&#8221;: &#8220;front&#8221;, &#8220;version&#8221;: &#8220;1.0.0&#8221;, &#8220;description&#8221;: &#8220;&#8221;, &#8220;main&#8221;: &#8220;index.js&#8221;, &#8220;scripts&#8221;: { &#8220;start&#8221;: &#8220;react-scripts start&#8221;, &#8220;build&#8221;: &#8220;REACT_APP_CURR_ENV=production react-scripts build&#8221;, &#8220;staging&#8221;: &#8220;REACT_APP_CURR_ENV=staging react-scripts build&#8221;, &#8220;test&#8221;: &#8220;react-scripts test&#8221;, &#8220;eject&#8221;: &#8220;react-scripts eject&#8221; }, \u3000\u3000\u3000\u30fb \u3000\u3000\u3000\u30fb \u3000\u3000\u3000\u4ee5\u4e0b\u7565 \u3000\u3000\u3000\u30fb \u3000\u3000\u3000\u30fb [\/bash] production\u74b0\u5883\u306e\u30d3\u30eb\u30c9\u3092\u884c\u3044\u305f\u3044\u3068\u304d\u306f [bash] $ npm run build [\/bash] staging\u74b0\u5883\u306e\u30d3\u30eb\u30c9\u3092\u884c\u3044\u305f\u3044\u3068\u304d\u306f [bash] $ npm run staging [\/bash] \u3053\u308c\u3067\u3001\u3081\u3067\u305f\u3057\u3001\u3081\u3067\u305f\u3057\u3002<\/p>\n","protected":false},"author":1,"featured_media":1864,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_uf_show_specific_survey":0,"_uf_disable_surveys":false,"footnotes":""},"categories":[77],"tags":[86],"class_list":{"0":"post-1863","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-react","8":"tag-react"},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d \u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === &quot;production&quot; ){ const_HOST_ADDR = &quot;https:\/\/myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/myapp.jp&quot;; } else if (process.env.REACT_APP_CURR_ENV === &quot;staging&quot; ){ const_HOST_ADDR = &quot;https:\/\/stg.myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/stg.myapp.jp&quot;; } else { const_HOST_ADDR = &quot;http:\/\/localhost:4000&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/localhost:4000&quot;; } export const\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"hiroshi\"\/>\n\t<meta name=\"google-site-verification\" content=\"fo5n0bjUdcitu1FsBTJqqwL580wBLhhCM51IEogDt9Y\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/lovelinux.mydns.jp\/?p=1863\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_GB\" \/>\n\t\t<meta property=\"og:site_name\" content=\"Love Linux | enjoy using linux for programming flatform\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b\" \/>\n\t\t<meta property=\"og:description\" content=\"create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d \u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === &quot;production&quot; ){ const_HOST_ADDR = &quot;https:\/\/myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/myapp.jp&quot;; } else if (process.env.REACT_APP_CURR_ENV === &quot;staging&quot; ){ const_HOST_ADDR = &quot;https:\/\/stg.myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/stg.myapp.jp&quot;; } else { const_HOST_ADDR = &quot;http:\/\/localhost:4000&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/localhost:4000&quot;; } export const\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/lovelinux.mydns.jp\/?p=1863\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2019-05-07T10:03:59+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-05-07T10:03:59+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b\" \/>\n\t\t<meta name=\"twitter:description\" content=\"create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d \u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === &quot;production&quot; ){ const_HOST_ADDR = &quot;https:\/\/myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/myapp.jp&quot;; } else if (process.env.REACT_APP_CURR_ENV === &quot;staging&quot; ){ const_HOST_ADDR = &quot;https:\/\/stg.myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/stg.myapp.jp&quot;; } else { const_HOST_ADDR = &quot;http:\/\/localhost:4000&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/localhost:4000&quot;; } export const\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#article\",\"name\":\"create-react-app \\u3067\\u4f5c\\u3063\\u305f\\u74b0\\u5883\\u3067\\u3001production\\\/staging\\\/xxx\\u306a\\u3069\\u3092 process.env\\u3092\\u4f7f\\u3063\\u3066\\u5207\\u308a\\u66ff\\u3048\\u308b\",\"headline\":\"create-react-app \\u3067\\u4f5c\\u3063\\u305f\\u74b0\\u5883\\u3067\\u3001production\\\/staging\\\/xxx\\u306a\\u3069\\u3092 process.env\\u3092\\u4f7f\\u3063\\u3066\\u5207\\u308a\\u66ff\\u3048\\u308b\",\"author\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?author=1#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/#person\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/wp-content\\\/uploads\\\/2019\\\/05\\\/react-beta.png\",\"width\":1440,\"height\":800},\"datePublished\":\"2019-05-07T19:03:59+09:00\",\"dateModified\":\"2019-05-07T19:03:59+09:00\",\"inLanguage\":\"en-GB\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#webpage\"},\"articleSection\":\"React, react\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/lovelinux.mydns.jp\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=2#listItem\",\"name\":\"\\u30d7\\u30ed\\u30b0\\u30e9\\u30df\\u30f3\\u30b0\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=2#listItem\",\"position\":2,\"name\":\"\\u30d7\\u30ed\\u30b0\\u30e9\\u30df\\u30f3\\u30b0\",\"item\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=2\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=77#listItem\",\"name\":\"React\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=77#listItem\",\"position\":3,\"name\":\"React\",\"item\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=77\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#listItem\",\"name\":\"create-react-app \\u3067\\u4f5c\\u3063\\u305f\\u74b0\\u5883\\u3067\\u3001production\\\/staging\\\/xxx\\u306a\\u3069\\u3092 process.env\\u3092\\u4f7f\\u3063\\u3066\\u5207\\u308a\\u66ff\\u3048\\u308b\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=2#listItem\",\"name\":\"\\u30d7\\u30ed\\u30b0\\u30e9\\u30df\\u30f3\\u30b0\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#listItem\",\"position\":4,\"name\":\"create-react-app \\u3067\\u4f5c\\u3063\\u305f\\u74b0\\u5883\\u3067\\u3001production\\\/staging\\\/xxx\\u306a\\u3069\\u3092 process.env\\u3092\\u4f7f\\u3063\\u3066\\u5207\\u308a\\u66ff\\u3048\\u308b\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?cat=77#listItem\",\"name\":\"React\"}}]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?author=1#author\",\"url\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?author=1\",\"name\":\"hiroshi\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#authorImage\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/e7c5ca03ae8cd5b5d36ac0f62f59c26d34fd667afa57dafb4978790c04c5146f?s=96&d=mm&r=g\",\"width\":96,\"height\":96,\"caption\":\"hiroshi\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#webpage\",\"url\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863\",\"name\":\"create-react-app \\u3067\\u4f5c\\u3063\\u305f\\u74b0\\u5883\\u3067\\u3001production\\\/staging\\\/xxx\\u306a\\u3069\\u3092 process.env\\u3092\\u4f7f\\u3063\\u3066\\u5207\\u308a\\u66ff\\u3048\\u308b\",\"description\":\"create-react-app\\u3057\\u305f\\u74b0\\u5883\\u3067\\u306f\\u3001start\\\/build\\\/test \\u306e\\u74b0\\u5883\\u306f\\u3067\\u304d\\u3066\\u3001\\u30d3\\u30eb\\u30c9\\u3059\\u308b\\u3068\\u304d\\u306b \\u5fc5\\u8981\\u306a\\u74b0\\u5883\\u5909\\u6570\\u304c process.env.NODE_ENV \\u306b\\u30bb\\u30c3\\u30c8\\u3055\\u308c\\u307e\\u3059\\u304c\\u30fb\\u30fb\\u30fb production\\u74b0\\u5883\\u306e\\u3068\\u304d\\u3001staging\\u306e\\u3068\\u304d \\u3068\\u5207\\u308a\\u66ff\\u3048\\u305f\\u3044\\u3068\\u304d\\u306b\\u3001 process.env.NODE_ENV\\u3067\\u306f\\u3046\\u307e\\u304f\\u884c\\u304d\\u307e\\u305b\\u3093\\u3002 create-react-app\\u3057\\u305f\\u74b0\\u5883\\u3067\\u306f\\u3001 \\u300cREACT_APP_xxxxxxx\\u300d \\u3068\\u3044\\u3046\\u74b0\\u5883\\u5909\\u6570\\u3092\\u4f7f\\u3046\\u3053\\u3068\\u304c\\u3067\\u304d\\u307e\\u3059\\uff01 \\u306a\\u306e\\u3067\\u3001\\u74b0\\u5883\\u5909\\u6570\\u306b REACT_APP_CURR_ENV \\u3068\\u3044\\u3046\\u5909\\u6570\\u3092\\u7528\\u610f\\u3057\\u307e\\u3059\\u3002 \\u3067\\u3001\\u74b0\\u5883\\u6bce\\u306b\\u9055\\u3046\\u8a2d\\u5b9a\\u306a\\u3069\\u306f\\u3001\\u3054\\u304f\\u50c5\\u304b\\u3060\\u3068\\u601d\\u3046\\u306e\\u3067\\u3001\\u79c1\\u306e\\u5834\\u5408\\u3053\\u3093\\u306ajavascript\\u3092\\u4f5c\\u3063\\u3066\\u5bfe\\u5fdc\\u3057\\u3066\\u307e\\u3059\\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === \\\"production\\\" ){ const_HOST_ADDR = \\\"https:\\\/\\\/myapp.jp\\\"; const_WS_HOST_ADDR = \\\"ws:\\\/\\\/myapp.jp\\\"; } else if (process.env.REACT_APP_CURR_ENV === \\\"staging\\\" ){ const_HOST_ADDR = \\\"https:\\\/\\\/stg.myapp.jp\\\"; const_WS_HOST_ADDR = \\\"ws:\\\/\\\/stg.myapp.jp\\\"; } else { const_HOST_ADDR = \\\"http:\\\/\\\/localhost:4000\\\"; const_WS_HOST_ADDR = \\\"ws:\\\/\\\/localhost:4000\\\"; } export const\",\"inLanguage\":\"en-GB\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#breadcrumblist\"},\"author\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?author=1#author\"},\"creator\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?author=1#author\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/wp-content\\\/uploads\\\/2019\\\/05\\\/react-beta.png\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863\\\/#mainImage\",\"width\":1440,\"height\":800},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/?p=1863#mainImage\"},\"datePublished\":\"2019-05-07T19:03:59+09:00\",\"dateModified\":\"2019-05-07T19:03:59+09:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/#website\",\"url\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/\",\"name\":\"Love Linux\",\"description\":\"enjoy using linux for programming flatform\",\"inLanguage\":\"en-GB\",\"publisher\":{\"@id\":\"https:\\\/\\\/lovelinux.mydns.jp\\\/#person\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","description":"create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d \u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === \"production\" ){ const_HOST_ADDR = \"https:\/\/myapp.jp\"; const_WS_HOST_ADDR = \"ws:\/\/myapp.jp\"; } else if (process.env.REACT_APP_CURR_ENV === \"staging\" ){ const_HOST_ADDR = \"https:\/\/stg.myapp.jp\"; const_WS_HOST_ADDR = \"ws:\/\/stg.myapp.jp\"; } else { const_HOST_ADDR = \"http:\/\/localhost:4000\"; const_WS_HOST_ADDR = \"ws:\/\/localhost:4000\"; } export const","canonical_url":"https:\/\/lovelinux.mydns.jp\/?p=1863","robots":"max-image-preview:large","keywords":"","webmasterTools":{"google-site-verification":"fo5n0bjUdcitu1FsBTJqqwL580wBLhhCM51IEogDt9Y","miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#article","name":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","headline":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","author":{"@id":"https:\/\/lovelinux.mydns.jp\/?author=1#author"},"publisher":{"@id":"https:\/\/lovelinux.mydns.jp\/#person"},"image":{"@type":"ImageObject","url":"https:\/\/lovelinux.mydns.jp\/wp-content\/uploads\/2019\/05\/react-beta.png","width":1440,"height":800},"datePublished":"2019-05-07T19:03:59+09:00","dateModified":"2019-05-07T19:03:59+09:00","inLanguage":"en-GB","mainEntityOfPage":{"@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#webpage"},"isPartOf":{"@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#webpage"},"articleSection":"React, react"},{"@type":"BreadcrumbList","@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp#listItem","position":1,"name":"Home","item":"https:\/\/lovelinux.mydns.jp","nextItem":{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?cat=2#listItem","name":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"}},{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?cat=2#listItem","position":2,"name":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","item":"https:\/\/lovelinux.mydns.jp\/?cat=2","nextItem":{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?cat=77#listItem","name":"React"},"previousItem":{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?cat=77#listItem","position":3,"name":"React","item":"https:\/\/lovelinux.mydns.jp\/?cat=77","nextItem":{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#listItem","name":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b"},"previousItem":{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?cat=2#listItem","name":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0"}},{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#listItem","position":4,"name":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","previousItem":{"@type":"ListItem","@id":"https:\/\/lovelinux.mydns.jp\/?cat=77#listItem","name":"React"}}]},{"@type":"Person","@id":"https:\/\/lovelinux.mydns.jp\/?author=1#author","url":"https:\/\/lovelinux.mydns.jp\/?author=1","name":"hiroshi","image":{"@type":"ImageObject","@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#authorImage","url":"https:\/\/secure.gravatar.com\/avatar\/e7c5ca03ae8cd5b5d36ac0f62f59c26d34fd667afa57dafb4978790c04c5146f?s=96&d=mm&r=g","width":96,"height":96,"caption":"hiroshi"}},{"@type":"WebPage","@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#webpage","url":"https:\/\/lovelinux.mydns.jp\/?p=1863","name":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","description":"create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d \u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === \"production\" ){ const_HOST_ADDR = \"https:\/\/myapp.jp\"; const_WS_HOST_ADDR = \"ws:\/\/myapp.jp\"; } else if (process.env.REACT_APP_CURR_ENV === \"staging\" ){ const_HOST_ADDR = \"https:\/\/stg.myapp.jp\"; const_WS_HOST_ADDR = \"ws:\/\/stg.myapp.jp\"; } else { const_HOST_ADDR = \"http:\/\/localhost:4000\"; const_WS_HOST_ADDR = \"ws:\/\/localhost:4000\"; } export const","inLanguage":"en-GB","isPartOf":{"@id":"https:\/\/lovelinux.mydns.jp\/#website"},"breadcrumb":{"@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#breadcrumblist"},"author":{"@id":"https:\/\/lovelinux.mydns.jp\/?author=1#author"},"creator":{"@id":"https:\/\/lovelinux.mydns.jp\/?author=1#author"},"image":{"@type":"ImageObject","url":"https:\/\/lovelinux.mydns.jp\/wp-content\/uploads\/2019\/05\/react-beta.png","@id":"https:\/\/lovelinux.mydns.jp\/?p=1863\/#mainImage","width":1440,"height":800},"primaryImageOfPage":{"@id":"https:\/\/lovelinux.mydns.jp\/?p=1863#mainImage"},"datePublished":"2019-05-07T19:03:59+09:00","dateModified":"2019-05-07T19:03:59+09:00"},{"@type":"WebSite","@id":"https:\/\/lovelinux.mydns.jp\/#website","url":"https:\/\/lovelinux.mydns.jp\/","name":"Love Linux","description":"enjoy using linux for programming flatform","inLanguage":"en-GB","publisher":{"@id":"https:\/\/lovelinux.mydns.jp\/#person"}}]},"og:locale":"en_GB","og:site_name":"Love Linux | enjoy using linux for programming flatform","og:type":"article","og:title":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","og:description":"create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d \u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === &quot;production&quot; ){ const_HOST_ADDR = &quot;https:\/\/myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/myapp.jp&quot;; } else if (process.env.REACT_APP_CURR_ENV === &quot;staging&quot; ){ const_HOST_ADDR = &quot;https:\/\/stg.myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/stg.myapp.jp&quot;; } else { const_HOST_ADDR = &quot;http:\/\/localhost:4000&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/localhost:4000&quot;; } export const","og:url":"https:\/\/lovelinux.mydns.jp\/?p=1863","article:published_time":"2019-05-07T10:03:59+00:00","article:modified_time":"2019-05-07T10:03:59+00:00","twitter:card":"summary_large_image","twitter:title":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","twitter:description":"create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001start\/build\/test \u306e\u74b0\u5883\u306f\u3067\u304d\u3066\u3001\u30d3\u30eb\u30c9\u3059\u308b\u3068\u304d\u306b \u5fc5\u8981\u306a\u74b0\u5883\u5909\u6570\u304c process.env.NODE_ENV \u306b\u30bb\u30c3\u30c8\u3055\u308c\u307e\u3059\u304c\u30fb\u30fb\u30fb production\u74b0\u5883\u306e\u3068\u304d\u3001staging\u306e\u3068\u304d \u3068\u5207\u308a\u66ff\u3048\u305f\u3044\u3068\u304d\u306b\u3001 process.env.NODE_ENV\u3067\u306f\u3046\u307e\u304f\u884c\u304d\u307e\u305b\u3093\u3002 create-react-app\u3057\u305f\u74b0\u5883\u3067\u306f\u3001 \u300cREACT_APP_xxxxxxx\u300d \u3068\u3044\u3046\u74b0\u5883\u5909\u6570\u3092\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\uff01 \u306a\u306e\u3067\u3001\u74b0\u5883\u5909\u6570\u306b REACT_APP_CURR_ENV \u3068\u3044\u3046\u5909\u6570\u3092\u7528\u610f\u3057\u307e\u3059\u3002 \u3067\u3001\u74b0\u5883\u6bce\u306b\u9055\u3046\u8a2d\u5b9a\u306a\u3069\u306f\u3001\u3054\u304f\u50c5\u304b\u3060\u3068\u601d\u3046\u306e\u3067\u3001\u79c1\u306e\u5834\u5408\u3053\u3093\u306ajavascript\u3092\u4f5c\u3063\u3066\u5bfe\u5fdc\u3057\u3066\u307e\u3059\u3002 [bash] let const_HOST_ADDR; let const_WS_HOST_ADDR; if (process.env.REACT_APP_CURR_ENV === &quot;production&quot; ){ const_HOST_ADDR = &quot;https:\/\/myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/myapp.jp&quot;; } else if (process.env.REACT_APP_CURR_ENV === &quot;staging&quot; ){ const_HOST_ADDR = &quot;https:\/\/stg.myapp.jp&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/stg.myapp.jp&quot;; } else { const_HOST_ADDR = &quot;http:\/\/localhost:4000&quot;; const_WS_HOST_ADDR = &quot;ws:\/\/localhost:4000&quot;; } export const"},"aioseo_meta_data":{"post_id":"1863","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"breadcrumb_settings":null,"limit_modified_date":false,"ai":null,"created":"2025-08-22 21:17:57","updated":"2025-08-25 11:30:09","seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/lovelinux.mydns.jp\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/lovelinux.mydns.jp\/?cat=2\" title=\"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\">\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/lovelinux.mydns.jp\/?cat=77\" title=\"React\">React<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tcreate-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/lovelinux.mydns.jp"},{"label":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0","link":"https:\/\/lovelinux.mydns.jp\/?cat=2"},{"label":"React","link":"https:\/\/lovelinux.mydns.jp\/?cat=77"},{"label":"create-react-app \u3067\u4f5c\u3063\u305f\u74b0\u5883\u3067\u3001production\/staging\/xxx\u306a\u3069\u3092 process.env\u3092\u4f7f\u3063\u3066\u5207\u308a\u66ff\u3048\u308b","link":"https:\/\/lovelinux.mydns.jp\/?p=1863"}],"_links":{"self":[{"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=\/wp\/v2\/posts\/1863","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1863"}],"version-history":[{"count":1,"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=\/wp\/v2\/posts\/1863\/revisions"}],"predecessor-version":[{"id":1865,"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=\/wp\/v2\/posts\/1863\/revisions\/1865"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=\/wp\/v2\/media\/1864"}],"wp:attachment":[{"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1863"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1863"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lovelinux.mydns.jp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1863"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}