{"id":2480,"date":"2016-05-26T10:00:51","date_gmt":"2016-05-26T01:00:51","guid":{"rendered":"http:\/\/sitest.jp\/blog\/?p=2480"},"modified":"2016-05-25T21:34:48","modified_gmt":"2016-05-25T12:34:48","slug":"%e3%80%90%e6%9c%80%e4%bd%8e%e9%99%90%e7%9f%a5%e3%81%a3%e3%81%a6%e3%81%8a%e3%81%8d%e3%81%9f%e3%81%84%e3%80%91es2015es6%e3%81%ae%e5%9f%ba%e6%9c%ac%e6%a7%8b%e6%96%87%e3%81%a8%e3%83%96%e3%83%a9%e3%82%a6","status":"publish","type":"post","link":"https:\/\/sitest.jp\/blog\/?p=2480","title":{"rendered":"\u3010\u6700\u4f4e\u9650\u77e5\u3063\u3066\u304a\u304d\u305f\u3044\u3011ES2015\/ES6\u306e\u57fa\u672c\u69cb\u6587\u3068\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u72b6\u6cc1"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\u3001SiTest\u4e8b\u696d\u90e8\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7267\u3067\u3059\u3002<\/p>\n

\u6628\u5e74\u306e6\u6708\u306bECMAScript2015\u304c\u5236\u5b9a\u3055\u308c\u307e\u3057\u305f\u306d\u3002
\n\u5236\u5b9a\u304b\u308910\u30f6\u6708\u304c\u7d4c\u904e\u3057\u3001\u6d78\u900f\u304c\u9032\u3093\u3067\u304d\u3066\u3044\u308b\u3068\u611f\u3058\u3066\u3044\u307e\u3059\u3002
\n\u4eca\u56de\u306fES2015\u306e\u57fa\u672c\u69cb\u6587\u3068\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u306e\u5bfe\u5fdc\u72b6\u6cc1\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002
\n<\/p>\n

\n

\u305d\u3082\u305d\u3082ECMAScript2015\u3068\u306f\uff1f<\/h3>\n<\/div>\n

ECMAScript\u3068\u306fJavaScript\u306e\u6a19\u6e96\u898f\u683c\u3067\u3042\u308a\u3001ECMAScript2015\u3068\u306fECMAScript\u306e\u7b2c6\u7248\u306b\u306a\u308a\u307e\u3059\u3002
\n\u5f53\u521d\u306fECMAScript6\uff08ES6\uff09\u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3001\u6b63\u5f0f\u540d\u79f0\u306fECMAScript2015\uff08ES2015\uff09\u3068\u306a\u308a\u307e\u3057\u305f\u3002
\nES2015\u304b\u3089\u66f4\u306b\u591a\u304f\u306e\u30b7\u30f3\u30bf\u30c3\u30af\u30b9\u304c\u8ffd\u52a0\u3055\u308c\u3088\u308aJavaScript\u304c\u66f8\u304d\u3084\u3059\u304f\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\n

ES2015\/ES6\u306e\u57fa\u672c\u69cb\u6587<\/h3>\n<\/div>\n

let\u30fbconst\u306b\u3088\u308b\u5909\u6570\u5ba3\u8a00<\/h4>\n

\u5909\u6570\u5ba3\u8a00\u306e\u65b9\u6cd5\u306fES5\u307e\u3067\u306fvar\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u3002
\n\u305d\u306e\u305f\u3081\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u304c\u66d6\u6627\u306b\u306a\u308b\u305f\u3081\u30af\u30ed\u30fc\u30b8\u30e3\u3092\u4f7f\u7528\u3057\u3066\u30b9\u30b3\u30fc\u30d7\u306e\u5236\u9650\u3092\u3057\u3066\u3044\u307e\u3057\u305f\u3002
\nES2015\u3067\u306f\u30d6\u30e9\u30b1\u30c3\u30c8{}\u306b\u3088\u308b\u30d6\u30ed\u30c3\u30af\u30b9\u30b3\u30fc\u30d7\u304c\u5b9f\u73fe\u3055\u308c\u307e\u3057\u305f\u3002
\n\u30d6\u30e9\u30b1\u30c3\u30c8\u5185\u306blet\u3084const\u3067\u5909\u6570\u5b9a\u7fa9\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u5909\u6570\u306f\u30d6\u30e9\u30b1\u30c3\u30c8\u306e\u30b9\u30b3\u30fc\u30d7\u5185\u3067\u306e\u307f\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\nlet foo = [10, 20, 30];\n{\n  let foo = [100, 200, 300];\n  console.log(foo); \/\/ [100, 200, 300]\n}\nconsole.log(foo); \/\/ [10, 20, 30]\n<\/code><\/pre>\n
let\u306f\u518d\u5ba3\u8a00\u304c\u51fa\u6765\u306a\u3044\u5909\u6570\u5ba3\u8a00\u3067\u3059\u3002
\n\u4ee3\u5165\u306f\u51fa\u6765\u307e\u3059\u304c\u3001\u5909\u6570\u3092\u518d\u5ba3\u8a00\u3057\u305f\u5834\u5408\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n
\nvar person = {name: \"John\"};\nvar person = {name: \"Jane\"}; \/\/ var \u306f\u518d\u5ba3\u8a00\u304c\u3067\u304d\u308b\n\nlet person = {name: \"John\"}:\nperson = {name: \"Sam\"}; \/\/ \u4ee3\u5165\u306f\u554f\u984c\u306a\u3044\nlet person = {name: \"jane\"}; \/\/ \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\n<\/code><\/pre>\n
const\u306flet\u3088\u308a\u3082\u66f4\u306b\u53b3\u3057\u304f\u518d\u5ba3\u8a00\u3082\u4ee3\u5165\u3082\u51fa\u6765\u306a\u3044\u5909\u6570\u5ba3\u8a00\u3068\u306a\u308a\u307e\u3059\u3002
\n\u518d\u5ba3\u8a00\u3082\u3057\u304f\u306f\u4ee3\u5165\u3092\u3057\u305f\u5834\u5408\u30a8\u30e9\u30fc\u304c\u767a\u751f\u3057\u307e\u3059\u3002<\/p>\n
\nconst foo = 100;\nfoo = 200; \/\/ \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\nconst foo = 300; \/\/ \u30a8\u30e9\u30fc\u304c\u767a\u751f\u3059\u308b\n<\/code><\/pre>\n
class\u69cb\u6587<\/h4>\n
ES5\u307e\u3067\u306f\u30af\u30e9\u30b9\u3068\u8a00\u3046\u3082\u306e\u304c\u3042\u308a\u307e\u305b\u3093\u3067\u3057\u305f\u304c\u3001
\nprototype\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u64ec\u4f3c\u7684\u306a\u30af\u30e9\u30b9\u3092\u5b9f\u73fe\u3057\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n
\nfunction Person(name) {\n  this.name = name;\n}\nPerson.prototype.hello = function(){\n  return \"I am \" + this.name;\n}\nperson = new Person(\"Jone Doe\");\nperson.hello(); \/\/ \"I am John Doe\"\n<\/code><\/pre>\n
ES2015\u3067\u306f\u3068\u3046\u3068\u3046class\u69cb\u6587\u304c\u5b9f\u88c5\u3055\u308c\u3001\u30af\u30e9\u30b9\u306e\u7d99\u627f\u3082extends\u30ad\u30fc\u30ef\u30fc\u30c9\u3092\u4f7f\u7528\u3059\u308b\u3060\u3051\u3067\u3068\u3066\u3082\u7c21\u5358\u306b\u66f8\u304f\u3053\u3068\u304c\u51fa\u6765\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
\nclass Animal {\n  constructor(name) {\n    this.name = name;\n  }\n  speak() {\n    return this.name + \"make a noise\";\n  }\n}\nclass Cat extends Animal {\n  speak(){\n    return this.name + \"meow\";\n  }\n}\ncat = new Cat(\"tama\");\ncat.speak(); \/\/ \"tama meow\"\n<\/code><\/pre>\n
\u6587\u5b57\u5217\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30ea\u30c6\u30e9\u30eb<\/h4>\n
ES5\u3067\u306f\u6587\u5b57\u5217\u5185\u306b\u5909\u6570\u3092\u5165\u308c\u8fbc\u307f\u305f\u3044\u5834\u5408+\u3092\u4f7f\u7528\u3057\u3066\u3044\u307e\u3057\u305f\u3002
\nES2015\u304b\u3089\u306f\u30d0\u30c3\u30af\u30af\u30aa\u30fc\u30c8“\u3067\u6587\u5b57\u5217\u3092\u56f2\u3080\u3053\u3068\u3067${}\u3092\u4f7f\u7528\u3057\u305f\u5909\u6570\u5c55\u958b\u3092\u884c\u3046\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002
\n\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u30ea\u30c6\u30e9\u30eb\u306f\u591a\u304f\u306eAltJS\u3067\u306f\u5c0e\u5165\u3055\u308c\u3066\u3044\u307e\u3057\u305f\u304c\u3053\u308c\u3092ES2015\u304c\u53d6\u308a\u8fbc\u3080\u304b\u305f\u3061\u306b\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n
\nvar name = \"Jane\";\nconsole.log(\"I am \" + name); \/\/ ES5\nconsole.log(`I am ${name}`); \/\/ ES2015\n<\/code><\/pre>\n
\n
\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u5bfe\u5fdc\u72b6\u6cc1<\/h3>\n<\/div>\n
\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u306e\u5bfe\u5fdc\u72b6\u6cc1\u306fECMAScript6 compatibility table<\/a>\u3067\u78ba\u8a8d\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002
\n\"ES2015\u5bfe\u5fdc\u72b6\u6cc1\"<\/a>
\n\u3053\u3061\u3089\u306e\u30b5\u30a4\u30c8\u3067\u306fES5\u3084ES2015\u306b\u52a0\u3048\u6b21\u4e16\u4ee3ECMAScript\u306e\u8ffd\u52a0\u4e88\u5b9a\u6a5f\u80fd\u3084\u5bfe\u5fdc\u72b6\u6cc1\u3082\u8a18\u8f09\u3055\u308c\u3066\u3044\u307e\u3059\u3002
\n\u898b\u65b9\u3068\u3057\u3066\u306f\u7dd1\u8272\u306e\u3068\u3053\u308d\u304c\u5bfe\u5fdc\u3067\u304d\u3066\u3044\u308b\u6587\u6cd5\u3001\u8d64\u8272\u306e\u3068\u3053\u308d\u304c\u5bfe\u5fdc\u3067\u304d\u3066\u3044\u306a\u3044\u6587\u6cd5\u3068\u306a\u308a\u307e\u3059\u3002
\n\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u306e\u5bfe\u5fdc\u72b6\u6cc1\u3092\u898b\u3066\u307f\u308b\u3068Google Chrome\u3084Firefox\u3001Microsoft Edge\u306fES2015\u306e8\u5272\u4ee5\u4e0a\u306e\u5bfe\u5fdc\u304c\u7d42\u308f\u3063\u3066\u3044\u307e\u3059\u3002
\n\u305f\u3060\u3057InternetExplorer\u3084Safari\u3001\u30e2\u30d0\u30a4\u30eb\u30d6\u30e9\u30a6\u30b6\u306a\u3069\u306f\u307e\u3060\u307e\u3060\u5bfe\u5fdc\u3067\u304d\u3066\u3044\u307e\u305b\u3093\u3002
\n\u305d\u306e\u305f\u3081\u3001ES2015\u3092\u305d\u306e\u307e\u307e\u4f7f\u3063\u3066\u958b\u767a\u3059\u308b\u3068\u3044\u3046\u306e\u306f\u307e\u3060\u307e\u3060\u96e3\u3057\u305d\u3046\u3067\u3059\u3002<\/p>\n
\n
\u6700\u5f8c\u306b<\/h3>\n<\/div>\n
ECMAScript\u306fES2015\u304b\u3089\u5e74\u5358\u4f4d\u306e\u30ea\u30ea\u30fc\u30b9\u3092\u76ee\u6307\u3057\u3066\u3044\u304d\u307e\u3059\u3002
\n\u307e\u3060\u307e\u3060ES2015\u5358\u4f53\u3060\u3051\u3067\u306e\u5b9f\u6226\u6295\u5165\u306f\u96e3\u3057\u305d\u3046\u3067\u3059\u304c\u30c8\u30e9\u30f3\u30b9\u30d1\u30a4\u30eb\u3084TypeScript\u306a\u3069\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u3001
\n\u958b\u767a\u3078\u5c0e\u5165\u3059\u308b\u6577\u5c45\u304c\u3068\u3066\u3082\u4f4e\u304f\u306a\u308a\u307e\u3059\u3002
\n\u4eca\u56de\u3054\u7d39\u4ecb\u3057\u305f\u57fa\u672c\u69cb\u6587\u4ee5\u5916\u306b\u3082\u4fbf\u5229\u306a\u69cb\u6587\u304c\u591a\u6570\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u305c\u3072\u7686\u69d8\u3082\u4e00\u5ea6\u4f7f\u3063\u3066\u307f\u3066\u306f\u3069\u3046\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u3053\u3093\u306b\u3061\u306f\u3001SiTest\u4e8b\u696d\u90e8\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u7267\u3067\u3059\u3002 \u6628\u5e74\u306e6\u6708\u306bECMAScript2015\u304c\u5236\u5b9a\u3055\u308c\u307e\u3057\u305f\u306d\u3002 \u5236\u5b9a\u304b\u308910\u30f6\u6708\u304c\u7d4c\u904e\u3057\u3001\u6d78\u900f\u304c\u9032\u3093\u3067\u304d\u3066\u3044\u308b\u3068\u611f\u3058\u3066\u3044\u307e\u3059\u3002 \u4eca\u56de\u306fES2015\u306e\u57fa\u672c\u69cb\u6587\u3068\u4e3b\u8981\u30d6\u30e9\u30a6\u30b6\u306e\u5bfe\u5fdc\u72b6\u6cc1\u3092\u3054\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n","protected":false},"author":1,"featured_media":2530,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[27],"tags":[],"acf":false,"_links":{"self":[{"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/posts\/2480"}],"collection":[{"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/comments?post=2480"}],"version-history":[{"count":9,"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/posts\/2480\/revisions"}],"predecessor-version":[{"id":2570,"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/posts\/2480\/revisions\/2570"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/media\/2530"}],"wp:attachment":[{"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/media?parent=2480"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/categories?post=2480"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sitest.jp\/blog\/wp-json\/wp\/v2\/tags?post=2480"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}