{"id":2141,"date":"2023-12-16T13:50:24","date_gmt":"2023-12-16T04:50:24","guid":{"rendered":"https:\/\/www.dogrow.net\/hp\/?p=2141"},"modified":"2023-12-17T16:50:02","modified_gmt":"2023-12-17T07:50:02","slug":"blog142","status":"publish","type":"post","link":"https:\/\/www.dogrow.net\/hp\/blog142\/","title":{"rendered":"(142) JavaScript\u3067ISBN\u304b\u3089\u66f8\u7c4d\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u3002"},"content":{"rendered":"

1. \u3084\u308a\u305f\u3044\u3053\u3068<\/h1>\n

\u66f8\u7c4d\u306e\u88cf\u8868\u7d19\u306b\u30d7\u30ea\u30f3\u30c8\u3055\u308c\u3066\u3044\u308b ISBN\u30b3\u30fc\u30c9<\/span> \u306e\u5024\u304b\u3089\u66f8\u7c4d\u60c5\u5831\u3092\u53d6\u5f97\u3057\u305f\u3044\u3002
\n\u3053\u306e\u305f\u3081\u306e Web API\u304c\u3044\u308d\u3044\u308d\u306a\u30b5\u30a4\u30c8\u3067\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u3002<\/p>\n

\u2193 ISBN\u30b3\u30fc\u30c9 \u2193
\n\"\"<\/p>\n

\u4eca\u56de\u306f Google Book API<\/a> \u3092\u4f7f\u3063\u3066 ISBN to \u66f8\u7c4d\u60c5\u5831<\/span> \u306e\u5909\u63db\u51e6\u7406\u3092\u5b9f\u73fe\u3057\u3066\u307f\u308b\u3002<\/p>\n

2. \u3084\u3063\u3066\u307f\u308b<\/h1>\n

\u5b9f\u88c5\u6e08\u307f\u306e\u30da\u30fc\u30b8\u306f\u3053\u3061\u3089\u3002
\nhttps:\/\/www.dogrow.net\/hp\/sample\/00142\/01\/<\/a><\/p>\n

(1) index.html<\/h3>\n

\u305f\u3063\u305f\u3053\u308c\u3060\u3051\u306e\u753b\u9762\u3060\u3002
\n\u30fbISBN\u30b3\u30fc\u30c9\u306e\u5165\u529b\u6b04
\n\u30fbISBN to \u66f8\u7c4d\u60c5\u5831\u306e\u5909\u63db\u5b9f\u884c\u30dc\u30bf\u30f3
\n\u30fb\u53d6\u5f97\u7d50\u679c\u306e\u8868\u793a\u6b04\uff08\u8d64\u67a0\u5185\uff09
\n\"\"<\/p>\n

\r\n<!DOCTYPE html>\r\n<html>\r\n<head>\r\n  <meta charset="UTF-8">\r\n  <link rel="stylesheet" href="style.css" \/>\r\n  <script src="script.js"><\/script>\r\n  <title>Blog No.142-01 Google Books API<\/title>\r\n<\/head>\r\n<body>\r\n<input type="text" name="isbn" value="9784297126858" \/>\r\n<input id="btnStartQuery"  type="button" value="Execute ISBN Query"  \/>\r\n<div id="result"><\/div>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n
(2) style.css<\/h3>\n
\u88c5\u98fe\u306f\u7279\u306b\u306a\u3057\u3002
\n\u53d6\u5f97\u3057\u305f\u66f8\u7c4d\u60c5\u5831\u306e\u8868\u793a\u6b04\u3092\u8d64\u67a0\u3067\u56f2\u3063\u305f\u3060\u3051\u3002<\/p>\n
\r\n#result{\r\n  border:2px solid #F00;\r\n}\r\n<\/pre>\n
(3) script.js<\/h3>\n
1\u884c\u76ee<\/span>\uff1aDOM\u751f\u6210\u901a\u77e5\u306b\u3066\u51e6\u7406\u3092\u5b9f\u88c5\u3059\u308b\u3002
\n8\u884c\u76ee<\/span>\uff1a\u30dc\u30bf\u30f3\u62bc\u4e0b\u6642\u306b\u8d77\u52d5\u3059\u308b\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3092\u767b\u9332\u3059\u308b\u3002
\n12\u884c\u76ee<\/span>\uff1afetch()\u3092\u4f7f\u3063\u3066HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u767a\u884c\u3059\u308b\u3002
\n13\u884c\u76ee<\/span>\uff1a\u3010\u30c1\u30a7\u30fc\u30f3#1\u3011\u53d7\u4fe1\u30c7\u30fc\u30bf\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u3001\u3053\u308c\u3092 JSON\u3068\u3057\u3066\u69cb\u6587\u89e3\u6790\u3057\u3001\u305d\u306e\u7d50\u679c\u3092 JavaScript\u30aa\u30d6\u30b8\u30a7\u30af\u30c8(A)\u306b\u5909\u63db\u3059\u308b\u3002
\n14\u884c\u76ee<\/span>\uff1a\u3010\u30c1\u30a7\u30fc\u30f3#2\u3011(A)\u3092\u5f15\u6570\u3068\u3057\u3066\u53d7\u3051\u3001\u3053\u308c\u3092\u95a2\u6570\u5185(\u30a2\u30ed\u30fc\u95a2\u6570\u3067\u8a18\u8ff0)\u3067\u51e6\u7406\u3059\u308b\u3002
\n33\u884c\u76ee<\/span>\uff1a\u30c1\u30a7\u30fc\u30f3#1, #2\u3067\u767a\u751f\u3057\u305f\u4f8b\u5916\u3092\u30ad\u30e3\u30c3\u30c1\u3059\u308b\u3002<\/p>\n
\r\ndocument.addEventListener("DOMContentLoaded", function() {\r\n  \/\/ \u4f7f\u7528\u3059\u308b DOM Object\u3092\u4e8b\u524d\u53d6\u5f97\u3057\u3066\u304a\u304f\u3002\r\n  const btnStartQuery  = document.getElementById("btnStartQuery");\r\n  const inpIsbn        = document.querySelector('input[name="isbn"]');\r\n  const divResult      = document.getElementById("result");\r\n\r\n  \/\/ [execute ISBN query]\u30dc\u30bf\u30f3\u62bc\u4e0b\u6642\u306e\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u3092\u767b\u9332\u3059\u308b\u3002\r\n  btnStartQuery.addEventListener("click", function() {\r\n    \/\/ ISBN\u30b3\u30fc\u30c9\u5165\u529b\u6b04\u306b\u30bb\u30c3\u30c8\u3055\u308c\u3066\u3044\u308b\u5024\u3092\u53d6\u5f97\u3059\u308b\u3002\r\n    let isbn = inpIsbn.value;\r\n    \/\/ Google Books API\u3092\u4f7f\u3063\u3066\u66f8\u7c4d\u60c5\u5831\u3092\u53d6\u5f97\u3059\u308b\u3002\r\n    fetch(`https:\/\/www.googleapis.com\/books\/v1\/volumes?q=isbn:${isbn}`)\r\n      .then(resp => resp.json())\r\n      .then(data => {\r\n        \/\/ \u66f8\u7c4d\u30c7\u30fc\u30bf\u306e\u89e3\u6790\u3068\u8868\u793a\r\n        if (data.items && data.items.length > 0) {\r\n          var book = data.items[0].volumeInfo;\r\n          console.log('book:', book);\r\n          console.log('# of Authors:', book.authors.length);\r\n          book.authors.forEach(function(e){\r\n            console.log('Author:', e);     \/\/ \u8457\u8005\r\n          });\r\n          divResult.innerHTML = `\r\n              \u30bf\u30a4\u30c8\u30eb: ${book.title}<br \/>\r\n              \u8457\u8005:     ${book.authors}<br \/>\r\n              \u51fa\u7248\u793e:   ${book.publisher}\r\n          `;\r\n        } else {\r\n          divResult.innerHTML = `${isbn}\u306e\u66f8\u7c4d\u60c5\u5831\u304c\u898b\u3064\u304b\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002`;\r\n          console.log('No book found with that ISBN.');\r\n        }\r\n      })\r\n      .catch(error => {\r\n        console.error('Error fetching data:', error);\r\n      });\r\n  });\r\n});\r\n<\/pre>\n
3. \u88dc\u8db3\u8aac\u660e<\/h1>\n
(1) \u56fd\u7acb\u56fd\u4f1a\u56f3\u66f8\u9928\u306e Web API\u306f JavaScript\u304b\u3089\u306f\u4f7f\u3048\u306a\u3044<\/h3>\n
Google Books API\u306e\u5fdc\u7b54\u30c7\u30fc\u30bf\u3092\u898b\u308b\u3068\u3001\u51fa\u7248\u8005\u3084\u30b8\u30e3\u30f3\u30eb\u306a\u3069\u306e\u60c5\u5831\u304c\u63d0\u4f9b\u3055\u308c\u306a\u3044\u3053\u3068\u304c\u591a\u3044\u3002
\n\u3053\u306e\u305f\u3081\u3001\u66f8\u7c4d\u60c5\u5831\u304c\u5145\u5b9f\u3057\u3066\u3044\u308b\u56fd\u4f1a\u56f3\u66f8\u9928\u306eWeb API\u3092\u4f7f\u3044\u305f\u3044\u306e\u3060\u304c…
\nCORS\u5236\u7d04\u306e\u305f\u3081\u3001\u56fd\u4f1a\u56f3\u66f8\u9928\u306e Web API\u3092 JavaScript\u304b\u3089\u5229\u7528\u3067\u304d\u306a\u3044\u3002<\/span><\/p>\n
CORS : Cross-Origin Resource Sharing \u203b\u30b3\u30fc\u30ba\u3068\u767a\u97f3\u3059\u308b\u3002<\/span>
\nOrigin : Web\u30da\u30fc\u30b8\u306e\u30c0\u30a6\u30f3\u30ed\u30fc\u30c9\u5143\u306e\u30c9\u30e1\u30a4\u30f3\u3001\u30dd\u30fc\u30c8\u756a\u53f7\u3001\u30b9\u30ad\u30fc\u30e0(http. https)\u306e\u3053\u3068\u3002<\/p>\n
JavaScript\u3067\u56fd\u7acb\u56fd\u4f1a\u56f3\u66f8\u9928\u306e Web API\u306b\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u9001\u308b\u3068\u3001\u5177\u4f53\u7684\u306b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u52d5\u4f5c\u3092\u3057\u3066\u3044\u308b\u3002
\n1.\u3010Web\u30d6\u30e9\u30a6\u30b6\u3011JavaScript\u304b\u3089\u56fd\u4f1a\u56f3\u66f8\u9928 Web API\u306b\u5bfe\u3057\u3066 HTTP\u30ea\u30af\u30a8\u30b9\u30c8\u3092\u767a\u884c
\n2.\u3010\u56fd\u4f1a\u56f3\u66f8\u9928Web\u30b5\u30fc\u30d0\u3011Web API\u306e\u5fdc\u7b54\u30c7\u30fc\u30bf\u3092\u8fd4\u9001
\n\u3000\u3000\u203b\u3053\u306e\u3068\u304d\u3001HTTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u306b Access-Control-Allow-Origin \u30d8\u30c3\u30c0\u304c\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u3002<\/span>
\n3.\u3010Web\u30d6\u30e9\u30a6\u30b6\u3011\u30c7\u30fc\u30bf\u3092\u53d7\u4fe1\u3059\u308b\u304c\u3001HTTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u5185\u306b CORS\u60c5\u5831\u304c\u7121\u3044\u305f\u3081\u3001\u3053\u308c\u3092\u30e6\u30fc\u30b6\u30fc\u30a2\u30d7\u30ea(=JavaScript\u30d7\u30ed\u30b0\u30e9\u30e0\uff09\u306b\u6e21\u3055\u306a\u3044\u3002
\n\u3000\u3000\u2192 Web API\u304c\u6a5f\u80fd\u3057\u306a\u3044\u3088\u3046\u306b\u898b\u3048\u3066\u3044\u308b\u3002<\/p>\n
\u56e0\u307f\u306b\u3001JavaScript\u304b\u3089\u306e Web API\u5b9f\u884c\u304c\u6210\u529f\u3059\u308b\u5834\u5408\u3001
\nWeb\u30b5\u30fc\u30d0\u304b\u3089\u306e HTTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u5185\u306b Access-Control-Allow-Origin: *<\/span> \u304c\u542b\u307e\u308c\u3066\u3044\u308b\u3002<\/p>\n
CORS(Cross-Origin Resource Sharing)\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u30b5\u30a4\u30c8\u3092\u53c2\u7167\u3055\u308c\u305f\u3044\u3002
\nhttps:\/\/aws.amazon.com\/jp\/what-is\/cross-origin-resource-sharing\/<\/a><\/p>\n
CORS\u5236\u7d04\u3092\u56de\u907f\u3057\u3066 JavaScript\u304b\u3089\u306e Web API\u5229\u7528\u3092\u53ef\u80fd\u306b\u3059\u308b\u306b\u306f\uff1f<\/span>
\n\u7b561\uff1a\u4f7f\u3063\u3066\u3044\u308bWeb\u30d6\u30e9\u30a6\u30b6\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8a2d\u5b9a\u3092\u7de9\u548c\u3057\u3001CORS\u5236\u7d04\u3092\u30c1\u30a7\u30c3\u30af\u7121\u306b\u8a2d\u5b9a\u5909\u66f4\u3059\u308b\u3002 \u203b\u5371\u967a\uff1f<\/span>
\n\u7b562\uff1a\u30b5\u30fc\u30d0\u30fc\u7ba1\u7406\u8005\u306b HTTP\u30ec\u30b9\u30dd\u30f3\u30b9\u30d8\u30c3\u30c0\u306b CORS\u60c5\u5831\u3092\u57cb\u3081\u8fbc\u3080\u3088\u3046\u306b\u4f9d\u983c\u3059\u308b\u3002<\/p>\n
(2) \u30a2\u30ed\u30fc\u95a2\u6570\u304b\u3089\u7121\u540d\u95a2\u6570\u3078\u306e\u7f6e\u304d\u63db\u3048<\/h3>\n
\u4e0a\u8a18\u306e script.js\u5185\u306e fetch()\u95a2\u6570\u914d\u4e0b\u3067\u306f\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u3002
\n\u3053\u308c\u3092\u7121\u540d\u95a2\u6570\u3067\u66f8\u304d\u63db\u3048\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3002<\/p>\n
Before<\/span> : \u30a2\u30ed\u30fc\u95a2\u6570<\/p>\n
\r\nfetch("http:\/\/example.com\/webapi")\r\n  .then(resp => resp.json())\r\n  .then(data => {\r\n    \/\/ do something\r\n    \/\/ \u6b21\u306b\u9023\u9396\u3055\u305b\u308b\u306a\u3089\u3070\u3001retun\u3067 Promise\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3053\u3068\u3002\r\n  })\r\n  .catch(error => {\r\n    \/\/ do something\r\n  });\r\n});\r\n<\/pre>\n
After<\/span> : \u7121\u540d\u95a2\u6570<\/p>\n
\r\nfetch("http:\/\/example.com\/webapi")\r\n  .then(function(resp){\r\n    \/\/ retun\u3067 JSON\u89e3\u6790\u7d50\u679c\u3092 body\u306b\u6301\u3064 Response\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3002\u2192 \u6b21\u306b\u9023\u9396\r\n    return resp.json();\r\n  })\r\n  .then(function(data){\r\n    \/\/ do something\r\n    \/\/ \u6b21\u306b\u9023\u9396\u3055\u305b\u308b\u306a\u3089\u3070\u3001retun\u3067 Promise\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u3053\u3068\u3002\r\n  })\r\n  .catch(function(error){\r\n    \/\/ do something\r\n  });\r\n});\r\n<\/pre>\n
(3) \u30a2\u30ed\u30fc\u95a2\u6570\u306e\u5f15\u6570\u3068\u623b\u308a\u5024\uff08\u5358\u4e00\u5f0f\u306e\u5834\u5408\uff09<\/h3>\n
\u30a2\u30ed\u30fc\u95a2\u6570\u306e\u672c\u4f53\u304c\u5358\u4e00\u306e\u5f0f\u306e\u5834\u5408\u3001\u4e2d\u62ec\u5f27\u3068 return \u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3092\u7701\u7565\u3067\u304d\u308b<\/span>\u3002<\/p>\n
\r\nconst square = x => x * x;\r\n<\/pre>\n
\u4ee5\u4e0b\u3068\u540c\u3058\u3002<\/p>\n
\r\nfunction square(x){\r\n  return x * x;\r\n}\r\n<\/pre>\n
(4) \u30a2\u30ed\u30fc\u95a2\u6570\u306e\u5f15\u6570\u3068\u623b\u308a\u5024\uff08\u8907\u6570\u306e\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u304c\u3042\u308b\u5834\u5408\uff09<\/h3>\n
\u8907\u6570\u306e\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u3068\u306f\u3001\u547d\u4ee4\u304c\u8907\u6570\u884c\u3042\u308b\u3068\u3044\u3046\u3053\u3068\u3002
\n\u6b21\u306e\u4f8b\u3067\u306f\u5f15\u6570\u304c 2\u500b\u3042\u308b\u305f\u3081\u3001\u5f15\u6570\u306e\u5ba3\u8a00\u3092 () \u3067\u56f2\u3080\u5fc5\u8981\u304c\u3042\u308b\u3002<\/p>\n
\r\nconst add = (x, y) => {\r\n  const sum = x + y;\r\n  return sum;\r\n};\r\n<\/pre>\n
\u4ee5\u4e0b\u3068\u540c\u3058\u3002<\/p>\n
\r\nfunction add(x, y){\r\n  const sum = x + y;\r\n  return sum;\r\n}\r\n<\/pre>\n
(5) JavaScript\u306e Promise\u30af\u30e9\u30b9<\/h3>\n
fetch\u95a2\u6570\u306f Promise\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u8fd4\u3059\u305f\u3081\u3001.then\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u30ec\u30b9\u30dd\u30f3\u30b9\u3092\u51e6\u7406\u3059\u308b\u3002
\nMDN\u516c\u5f0f\u30b5\u30a4\u30c8\u306e Promise\u306e\u8aac\u660e\u306f\u3053\u3061\u3089 \u203b\u8981\u719f\u8aad<\/a><\/p>\n
\u7406\u89e3\u3059\u3079\u304d\u30dd\u30a4\u30f3\u30c8\u3092\u4ee5\u4e0b\u306b\u5217\u6319\u3059\u308b\u3002\uff08\u500b\u4eba\u7684\u306a\u610f\u898b\uff09<\/p>\n