{"id":1468,"date":"2025-06-01T08:23:09","date_gmt":"2025-05-31T23:23:09","guid":{"rendered":"https:\/\/itstudy365.com\/blog\/?p=1468"},"modified":"2025-06-02T06:16:58","modified_gmt":"2025-06-01T21:16:58","slug":"%e7%8f%be%e5%a0%b4%e3%81%a7%e4%bd%bf%e3%81%88%e3%82%8bchrome-devtools%e5%ae%9f%e8%b7%b5%e3%82%ac%e3%82%a4%e3%83%89-%e7%ac%ac8%e7%ab%a0%ef%bc%9anetwork%e3%83%91%e3%83%8d%e3%83%ab%e3%81%a7%e3%81%aehttp","status":"publish","type":"post","link":"https:\/\/itstudy365.com\/blog\/2025\/06\/01\/%e7%8f%be%e5%a0%b4%e3%81%a7%e4%bd%bf%e3%81%88%e3%82%8bchrome-devtools%e5%ae%9f%e8%b7%b5%e3%82%ac%e3%82%a4%e3%83%89-%e7%ac%ac8%e7%ab%a0%ef%bc%9anetwork%e3%83%91%e3%83%8d%e3%83%ab%e3%81%a7%e3%81%aehttp\/","title":{"rendered":"\u73fe\u5834\u3067\u4f7f\u3048\u308bChrome DevTools\u5b9f\u8df5\u30ac\u30a4\u30c9 \u7b2c8\u7ae0\uff1aNetwork\u30d1\u30cd\u30eb\u3067\u306eHTTP\u901a\u4fe1\u78ba\u8a8d"},"content":{"rendered":"\n<button id=\"bb1\" type=\"button\" value=\"Play\" 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<\/p>\n\n\n\n<p>Web\u30a2\u30d7\u30ea\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u64cd\u4f5c\u306b\u5fdc\u3058\u3066\u30b5\u30fc\u30d0\u30fc\u3068\u901a\u4fe1\u3057\u3001\u30c7\u30fc\u30bf\u3092\u53d6\u5f97\u30fb\u9001\u4fe1\u3057\u3066\u3044\u307e\u3059\u3002<br><strong>\u901a\u4fe1\u304c\u5931\u6557\u3059\u308b\u3001\u671f\u5f85\u3057\u305f\u30c7\u30fc\u30bf\u304c\u53d6\u5f97\u3067\u304d\u306a\u3044\u3001CORS\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b<\/strong>\u306a\u3069\u306e\u554f\u984c\u306b\u76f4\u9762\u3057\u305f\u3068\u304d\u3001\u6700\u3082\u983c\u308c\u308b\u306e\u304c\u300cNetwork\u30d1\u30cd\u30eb\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u7ae0\u3067\u306f\u3001HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u4e2d\u8eab\u306e\u78ba\u8a8d\u3084\u30ec\u30b9\u30dd\u30f3\u30b9\u30bf\u30a4\u30e0\u306e\u5206\u6790\u3001CORS\u30a8\u30e9\u30fc\u306e\u8aad\u307f\u89e3\u304d\u65b9\u307e\u3067\u3092\u89e3\u8aac\u3057\u3001<strong>\u901a\u4fe1\u30c8\u30e9\u30d6\u30eb\u3092\u53ef\u8996\u5316\u3057\u3066\u6839\u672c\u539f\u56e0\u3092\u7a81\u304d\u6b62\u3081\u308b\u529b<\/strong>\u3092\u8eab\u306b\u3064\u3051\u307e\u3059\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">8.1 \u30ea\u30af\u30a8\u30b9\u30c8\uff0f\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u5185\u5bb9\u78ba\u8a8d<\/h3>\n\n\n\n<p>Network\u30d1\u30cd\u30eb\u3067\u306f\u3001<strong>\u30da\u30fc\u30b8\u3067\u767a\u751f\u3057\u305f\u5168\u3066\u306e\u30ea\u30af\u30a8\u30b9\u30c8\uff08HTML\/CSS\/JS\/API\u306a\u3069\uff09\u3092\u4e00\u89a7\u3067\u78ba\u8a8d<\/strong>\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u57fa\u672c\u306e\u64cd\u4f5c\uff1a<\/h4>\n\n\n\n<ol>\n<li>\u30da\u30fc\u30b8\u3092\u30ea\u30ed\u30fc\u30c9\u3057\u3066\u30ea\u30af\u30a8\u30b9\u30c8\u4e00\u89a7\u3092\u8868\u793a<\/li>\n\n\n\n<li>\u6c17\u306b\u306a\u308b\u884c\u3092\u30af\u30ea\u30c3\u30af \u2192 \u8a73\u7d30\u30da\u30a4\u30f3\u304c\u8868\u793a\u3055\u308c\u308b<\/li>\n\n\n\n<li><code>Headers<\/code>, <code>Payload<\/code>, <code>Response<\/code>, <code>Preview<\/code> \u306a\u3069\u3067\u8a73\u7d30\u78ba\u8a8d<\/li>\n<\/ol>\n\n\n\n<h4 class=\"wp-block-heading\">\u30c1\u30a7\u30c3\u30af\u30dd\u30a4\u30f3\u30c8\uff1a<\/h4>\n\n\n\n<ul>\n<li><strong>Request URL<\/strong>\uff1a\u3069\u3053\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3057\u3066\u3044\u308b\u304b<\/li>\n\n\n\n<li><strong>Request Method<\/strong>\uff1aGET \/ POST \/ PUT \/ DELETE \u306a\u3069<\/li>\n\n\n\n<li><strong>Request Payload<\/strong>\uff1a\u9001\u4fe1\u3057\u305f\u30d1\u30e9\u30e1\u30fc\u30bf\uff08POST\u306eForm\u3084JSON\u306a\u3069\uff09<\/li>\n\n\n\n<li><strong>Response<\/strong>\uff1a\u30b5\u30fc\u30d0\u30fc\u304b\u3089\u8fd4\u3063\u3066\u304d\u305f\u751f\u30c7\u30fc\u30bf\uff08JSON, HTML\u306a\u3069\uff09<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udca1 \u30e6\u30fc\u30b9\u30b1\u30fc\u30b9\uff1a<\/h4>\n\n\n\n<ul>\n<li>API\u304b\u3089\u300c\u7a7a\u306e\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u8fd4\u308b\u300d\u2192 \u5b9f\u306f\u30af\u30a8\u30ea\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u9593\u9055\u3063\u3066\u3044\u305f<\/li>\n\n\n\n<li>\u30dc\u30bf\u30f3\u62bc\u4e0b\u6642\u306b\u901a\u4fe1\u304c\u8d77\u304d\u306a\u3044 \u2192 JavaScript\u30a8\u30e9\u30fc\u3067API\u547c\u3073\u51fa\u3057\u306b\u81f3\u3063\u3066\u3044\u306a\u304b\u3063\u305f<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">8.2 \u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u3001\u30ec\u30b9\u30dd\u30f3\u30b9\u30bf\u30a4\u30e0\u3001\u30d8\u30c3\u30c0\u30fc\u306e\u7406\u89e3<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u306e\u57fa\u672c\uff1a<\/h4>\n\n\n\n<ul>\n<li><strong>200<\/strong>\uff1a\u6210\u529f<\/li>\n\n\n\n<li><strong>304<\/strong>\uff1a\u30ad\u30e3\u30c3\u30b7\u30e5\u304b\u3089\u8aad\u307f\u8fbc\u307f\uff08\u901a\u4fe1\u81ea\u4f53\u306f\u884c\u308f\u308c\u3066\u3044\u306a\u3044\uff09<\/li>\n\n\n\n<li><strong>404<\/strong>\uff1a\u30ea\u30bd\u30fc\u30b9\u304c\u898b\u3064\u304b\u3089\u306a\u3044<\/li>\n\n\n\n<li><strong>500<\/strong>\uff1a\u30b5\u30fc\u30d0\u30fc\u5185\u90e8\u30a8\u30e9\u30fc<\/li>\n\n\n\n<li><strong>403 \/ 401<\/strong>\uff1a\u8a8d\u8a3c\u30fb\u8a8d\u53ef\u30a8\u30e9\u30fc<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u30ec\u30b9\u30dd\u30f3\u30b9\u30bf\u30a4\u30e0\u78ba\u8a8d\uff1a<\/h4>\n\n\n\n<ul>\n<li>Network\u30d1\u30cd\u30eb\u306e\u300cWaterfall\uff08\u6edd\u30b0\u30e9\u30d5\uff09\u300d\u3067\u3001DNS, \u63a5\u7d9a, \u30ea\u30af\u30a8\u30b9\u30c8, \u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u6642\u9593\u3092\u8272\u5206\u3051\u3067\u78ba\u8a8d<\/li>\n\n\n\n<li>\u8868\u793a\u5217\u306b\u300cTime\u300d\u300cLatency\u300d\u300cSize\u300d\u306a\u3069\u3092\u8ffd\u52a0\u3057\u3066\u6bd4\u8f03\u5206\u6790\u3082\u53ef\u80fd<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u30d8\u30c3\u30c0\u30fc\u306e\u898b\u3069\u3053\u308d\uff1a<\/h4>\n\n\n\n<ul>\n<li><strong>Request Headers<\/strong>\uff1a<code>Authorization<\/code>\u3001<code>Content-Type<\/code> \u306a\u3069<\/li>\n\n\n\n<li><strong>Response Headers<\/strong>\uff1a<code>Content-Type<\/code>, <code>Cache-Control<\/code>, <code>Access-Control-Allow-Origin<\/code> \u306a\u3069<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udca1 \u6d3b\u7528\u4f8b\uff1a<\/h4>\n\n\n\n<ul>\n<li>\u300cAPI\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u306f\u98db\u3093\u3067\u3044\u308b\u306e\u306b\u53cd\u5fdc\u304c\u306a\u3044\u300d\u2192 <code>CORS<\/code> \u30dd\u30ea\u30b7\u30fc\u306b\u3088\u308a\u30ec\u30b9\u30dd\u30f3\u30b9\u304c\u30d6\u30ed\u30c3\u30af\u3055\u308c\u3066\u3044\u305f<\/li>\n\n\n\n<li>\u300c\u753b\u50cf\u306e\u8aad\u307f\u8fbc\u307f\u304c\u9045\u3044\u300d\u2192 \u30b5\u30fc\u30d0\u30fc\u306e <code>Cache-Control<\/code> \u30d8\u30c3\u30c0\u30fc\u304c\u6b63\u3057\u304f\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u304b\u3063\u305f<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">8.3 CORS\u30a8\u30e9\u30fc\u306e\u8aad\u307f\u89e3\u304d<\/h3>\n\n\n\n<p><strong>CORS\uff08Cross-Origin Resource Sharing\uff09\u30a8\u30e9\u30fc<\/strong>\u306f\u3001<strong>\u7570\u306a\u308b\u30aa\u30ea\u30b8\u30f3\uff08\u30c9\u30e1\u30a4\u30f3\/\u30dd\u30fc\u30c8\/\u30d7\u30ed\u30c8\u30b3\u30eb\uff09\u9593\u306e\u901a\u4fe1\u5236\u9650<\/strong>\u306b\u3088\u3063\u3066\u8d77\u3053\u308b\u30d6\u30e9\u30a6\u30b6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u6a5f\u69cb\u3067\u3059\u3002<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">\u3088\u304f\u3042\u308bCORS\u30a8\u30e9\u30fc\uff1a<\/h4>\n\n\n\n<ul>\n<li><code>Access to fetch at 'https:\/\/api.example.com' from origin 'http:\/\/localhost:3000' has been blocked...<\/code><\/li>\n\n\n\n<li>\u539f\u56e0\uff1a\u30b5\u30fc\u30d0\u30fc\u304c <code>Access-Control-Allow-Origin<\/code> \u3092\u9069\u5207\u306b\u8fd4\u3057\u3066\u3044\u306a\u3044<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">DevTools\u3067\u306e\u78ba\u8a8d\u30dd\u30a4\u30f3\u30c8\uff1a<\/h4>\n\n\n\n<ul>\n<li>Network\u30bf\u30d6\u3067\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9078\u629e\u3057\u3001\u300cResponse Headers\u300d\u306b <code>Access-Control-*<\/code> \u30d8\u30c3\u30c0\u30fc\u304c\u3042\u308b\u304b\u78ba\u8a8d<\/li>\n\n\n\n<li><code>OPTIONS<\/code> \u30e1\u30bd\u30c3\u30c9\uff08\u30d7\u30ea\u30d5\u30e9\u30a4\u30c8\u30ea\u30af\u30a8\u30b9\u30c8\uff09\u306e\u6709\u7121\u3084\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u306b\u3082\u6ce8\u610f<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\u89e3\u6c7a\u306e\u65b9\u5411\u6027\uff08\u30b5\u30fc\u30d0\u30fc\u5074\u5bfe\u5fdc\uff09\uff1a<\/h4>\n\n\n\n<ul>\n<li>\u30b5\u30fc\u30d0\u30fc\u304c <code>Access-Control-Allow-Origin: *<\/code> \u3082\u3057\u304f\u306f\u9069\u5207\u306a\u30c9\u30e1\u30a4\u30f3\u3092\u8fd4\u3059\u3088\u3046\u8a2d\u5b9a<\/li>\n\n\n\n<li><code>Access-Control-Allow-Methods<\/code>, <code>Access-Control-Allow-Headers<\/code> \u306a\u3069\u306e\u8a2d\u5b9a\u3082\u4f75\u305b\u3066\u78ba\u8a8d<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">\ud83d\udca1 \u958b\u767a\u6642\u306e\u4e00\u6642\u56de\u907f\uff1a<\/h4>\n\n\n\n<ul>\n<li>Chrome\u306e CORS \u62e1\u5f35\u3092\u4f7f\u3046\uff08\u672c\u756a\u3067\u306fNG\uff09<\/li>\n\n\n\n<li><code>proxy<\/code> \u8a2d\u5b9a\uff08\u4f8b\uff1aReact\u306e <code>vite.config.ts<\/code> \u3084 <code>webpack-dev-server<\/code>\uff09<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83e\uddd1\u200d\ud83d\udcbb \u5b9f\u8df5\u8ab2\u984c<\/h3>\n\n\n\n<p><strong>\u8ab2\u984c\uff1a\u30d0\u30c3\u30af\u30a8\u30f3\u30c9API\u3068\u306e\u901a\u4fe1\u304c\u300c\u6210\u529f\u3057\u3066\u3044\u308b\u306e\u306b\u8868\u793a\u3055\u308c\u306a\u3044\u300d\u539f\u56e0\u3092\u8abf\u67fb\u305b\u3088<\/strong><\/p>\n\n\n\n<ol>\n<li><code>Network<\/code> \u30bf\u30d6\u3067\u8a72\u5f53API\u306e\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u7279\u5b9a<\/li>\n\n\n\n<li><code>Request Payload<\/code> \u3092\u78ba\u8a8d\u3057\u3001\u9001\u4fe1\u30c7\u30fc\u30bf\u306b\u8aa4\u308a\u304c\u306a\u3044\u304b\u78ba\u8a8d<\/li>\n\n\n\n<li><code>Response<\/code> \u30bf\u30d6\u3067\u8fd4\u5374\u3055\u308c\u305fJSON\u30c7\u30fc\u30bf\u3092\u78ba\u8a8d<\/li>\n\n\n\n<li>\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u304c200\u3067\u3082\u3001<code>Preview<\/code> \u3067\u4e2d\u8eab\u304c\u7a7a\u3001\u307e\u305f\u306f\u60f3\u5b9a\u5916\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d<\/li>\n\n\n\n<li>JavaScript\u3067\u306e\u63cf\u753b\u51e6\u7406\u306b\u9032\u3093\u3067\u8abf\u67fb<\/li>\n<\/ol>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">\ud83d\udcdd \u307e\u3068\u3081<\/h3>\n\n\n\n<ul>\n<li>Network\u30d1\u30cd\u30eb\u306f\u3001<strong>HTTP\u30ea\u30af\u30a8\u30b9\u30c8\uff0f\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u3059\u3079\u3066\u3092\u53ef\u8996\u5316\u3059\u308b\u6700\u91cd\u8981\u30c4\u30fc\u30eb<\/strong><\/li>\n\n\n\n<li><strong>\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u4e2d\u8eab\u3001\u30b9\u30c6\u30fc\u30bf\u30b9\u30b3\u30fc\u30c9\u3001\u901a\u4fe1\u6642\u9593\u3001\u30d8\u30c3\u30c0\u30fc\u60c5\u5831<\/strong>\u306e\u78ba\u8a8d\u304c\u53ef\u80fd<\/li>\n\n\n\n<li>CORS\u30a8\u30e9\u30fc\u306f\u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u3067\u306f\u306a\u304f<strong>\u30b5\u30fc\u30d0\u30fc\u5074\u306e\u8a2d\u5b9a\u30df\u30b9\u3067\u8d77\u3053\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069<\/strong>\u3002\u30a8\u30e9\u30fc\u6587\u3068\u30d8\u30c3\u30c0\u30fc\u3067\u539f\u56e0\u3092\u7279\u5b9a\u3067\u304d\u308b<\/li>\n<\/ul>\n\n\n\n<p>Network\u30d1\u30cd\u30eb\u3092\u4f7f\u3044\u3053\u306a\u305b\u3070\u3001API\u9023\u643a\u306e\u5931\u6557\u306e**\u201c\u898b\u3048\u306a\u3044\u58c1\u201d\u304c\u898b\u3048\u308b\u3088\u3046\u306b\u306a\u308a\u3001\u51b7\u9759\u306b\u5bfe\u51e6\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002**<\/p>\n\n\n\n<p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[53,43],"tags":[57],"_links":{"self":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1468"}],"collection":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/comments?post=1468"}],"version-history":[{"count":1,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1468\/revisions"}],"predecessor-version":[{"id":1469,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/posts\/1468\/revisions\/1469"}],"wp:attachment":[{"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/media?parent=1468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/categories?post=1468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itstudy365.com\/blog\/wp-json\/wp\/v2\/tags?post=1468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}