{"id":106015,"date":"2017-06-30T18:30:32","date_gmt":"2017-06-30T09:30:32","guid":{"rendered":"http:\/\/www.key-p.com\/blog\/staff\/?p=106015"},"modified":"2017-09-01T18:44:52","modified_gmt":"2017-09-01T09:44:52","slug":"javascript%e3%81%ae%e3%83%86%e3%83%b3%e3%83%97%e3%83%ac%e3%83%bc%e3%83%88%e6%96%87%e5%ad%97%e5%88%97%e3%81%ae%e3%82%bf%e3%82%b0%e3%82%92%e4%bd%bf%e3%81%a3%e3%81%a6%e3%80%81%e6%95%b0%e5%80%a4%e3%82%921","status":"publish","type":"post","link":"https:\/\/www.key-p.com\/blog\/staff\/archives\/106015","title":{"rendered":"JavaScript\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u30bf\u30b0\u306b\u3064\u3044\u3066"},"content":{"rendered":"<p>\n<img loading=\"lazy\" class=\"aligncenter size-full wp-image-106071\" src=\"http:\/\/www.key-p.com\/blog\/staff\/wp-content\/uploads\/2017\/06\/20170630_template_strings.png\" alt=\"JavaScript\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u30bf\u30b0\u306b\u3064\u3044\u3066\" width=\"578\" height=\"159\" \/>t\u3067\u3059\u3002<br \/>\nJavaScript\u306eES2015\u3067\u8ffd\u52a0\u3055\u308c\u305f\u3001<a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/JavaScript\/Reference\/template_strings\" target=\"_blank\">\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217<\/a>\u306e\u30bf\u30b0\u306e\u4f7f\u3044\u65b9\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<br \/>\n<h3>\u5b9f\u884c\u74b0\u5883<\/h3>\n<ul>\n \t<li>Node v8.1.2<\/li>\n<\/ul>\n<h3>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306b\u3064\u3044\u3066<\/h3>\n\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306f\u3001\u6587\u5b57\u5217\u3092\u5b9a\u7fa9\u3059\u308b\u969b\u3001\u6587\u5b57\u5217\u306e\u4e2d\u306b\u5909\u6570\u3084\u5f0f\u3092\u8a18\u8ff0\u3057\u3066\u4f7f\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n<br \/>\n\u307e\u305a\u306f\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u57fa\u672c\u7684\u306a\u4f7f\u3044\u65b9\u3067\u3059\u3002<br \/>\n<pre class=\"toolbar:1 lang:js decode:true\" title=\"template.js\">const a = 12;\nconst b = '13';\nconst string = `a:${a} b:${b} c:${a * 2}`;\nconsole.log( string );\n<\/pre>\n<pre class=\"theme:dark-terminal toolbar:1 nums:false lang:default decode:true \" title=\"template.js\u306e\u5b9f\u884c\u7d50\u679c\">$ node template.js\na:12 b:13 c:24\n<\/pre>\n\u6587\u5b57\u5217\u3092\u3001\u30d0\u30c3\u30af\u30af\u30a9\u30fc\u30c8( ` )\u3067\u56f2\u3044\u307e\u3059\u3002\u30b7\u30f3\u30b0\u30eb\u30af\u30a9\u30fc\u30c8( ' )\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n<br \/>\n\u300c${}\u300d\u3092\u4f7f\u3046\u3068\u3001\u30d0\u30c3\u30af\u30af\u30a9\u30fc\u30c8( ` )\u3067\u56f2\u3063\u305f\u6587\u5b57\u5217\u4e2d\u306b\u3001\u5909\u6570\u3084\u5f0f\u3092\u5c55\u958b\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n<h3>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u30bf\u30b0\u306b\u3064\u3044\u3066<\/h3>\n\u6b21\u306b\u3001\u30bf\u30b0\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<br \/>\n<br \/>\n\u30bf\u30b0\u306f\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u524d\u306b\u95a2\u6570\u3092\u62ec\u5f27\u306a\u3057\u3067\u8a18\u8ff0\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<br \/>\n<br \/>\n\u3053\u306e\u3068\u304d\u6e21\u3055\u308c\u308b\u5f15\u6570\u306f\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u4e2d\u306e\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u306e\u914d\u5217(\u3053\u3053\u3067\u306f\u300caa\u300d\u300cbb\u300d\u300ccc\u300d)\u3068\u4ee3\u7528\u5f0f\u90e8\u5206(\u3053\u3053\u3067\u306f\u300c11\u300d\u300c22\u300d)\u3092\u5206\u5272\u3057\u305f\u3082\u306e\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n<br \/>\n\u3053\u306e\u5206\u5272\u3055\u308c\u305f\u8981\u7d20\u3092\u4f7f\u3063\u3066\u3001\u72ec\u81ea\u306b\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u306e\u914d\u5217(\u3053\u3053\u3067\u306f\u300caa\u300d\u300cbb\u300d\u300ccc\u300d)\u306b\u5909\u66f4\u3092\u52a0\u3048\u305f\u308a\u3001\u6587\u5b57\u5217\u3060\u3051\u3067\u306a\u304f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306a\u3069\u3001\u6587\u5b57\u5217\u4ee5\u5916\u306e\u5024\u306b\u3057\u3066\u8fd4\u3059\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<br \/>\n<pre class=\"toolbar:1 lang:js decode:true\" title=\"template-tag.js\">function tag( strings, ...values ) {\n  console.log(strings);  \/\/ \u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb\u306e\u914d\u5217\u3092\u51fa\u529b\n  console.log(values);   \/\/ \u4ee3\u7528\u5f0f\u90e8\u5206\u3092\u51fa\u529b\n  return { foo: 'bar' }; \/\/ \u6587\u5b57\u5217\u4ee5\u5916\u3092\u8fd4\u3059\u3053\u3068\u3082\u3067\u304d\u308b\n}\n\nconsole.log( tag`aa${11}bb${22}cc` );\n<\/pre>\n<pre class=\"theme:dark-terminal toolbar:1 nums:false lang:default decode:true \" title=\"template-tag.js\u306e\u5b9f\u884c\u7d50\u679c\">$ node template-tag.js\n[ 'aa', 'bb', 'cc' ]\n[ 11, 22 ]\n{ foo: 'bar' }\n<\/pre>\n\u6587\u5b57\u5217\u4e2d\u306b\u5909\u6570\u3092\u5c55\u958b\u3059\u308b\u6a5f\u80fd\u306f\u4ed6\u306e\u8a00\u8a9e\u306b\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u3053\u306e\u3088\u3046\u306a\u30bf\u30b0\u306e\u6a5f\u80fd\u306fJavaScript\u306eES2015\u3067\u521d\u3081\u3066\u898b\u307e\u3057\u305f\u3002\u304b\u3086\u3044\u3068\u3053\u308d\u306b\u624b\u304c\u5c4a\u304f\u3088\u3046\u306b\u4fbf\u5229\u3060\u306a\u3042\u3068\u601d\u3044\u307e\u3057\u305f\u3002<br \/>\n<h3>\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u30bf\u30b0\u3067\u3001\u6570\u5024\u309216\u9032\u6570\u3067\u8868\u793a\u3059\u308b<\/h3>\n\u30bf\u30b0\u6a5f\u80fd\u306e\u5b9f\u4f8b\u3068\u3057\u3066\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u4e2d\u306e\u5024\u309216\u9032\u6570\u3067\u8868\u793a\u3059\u308b\u65b9\u6cd5\u3092\u793a\u3057\u307e\u3059\u3002<br \/>\n<pre class=\"toolbar:1 lang:js decode:true\" title=\"template-tag-hex.js\">function hex( strings, ...values ) {\n  values = values.map(\n    \/\/ \u6570\u5024\u306a\u308916\u9032\u6570\u306b\u5909\u63db\u3059\u308b\n    value =&gt; Number.isFinite( value ) ? `0x${value.toString( 16 )}` : value\n  );\n  return String.raw( strings, ...values ); \/\/ \u6587\u5b57\u5217\u9023\u7d50\u51e6\u7406\u306fString.raw\u306b\u4efb\u305b\u308b\n}\n\nconst string = hex`A:${10} B:${255} C:${'nnn'}`;\nconsole.log( string ); \/\/ \u51fa\u529b\n<\/pre>\n<pre class=\"theme:dark-terminal toolbar:1 nums:false lang:default decode:true \" title=\"template-tag-hex.js\u306e\u5b9f\u884c\u7d50\u679c\">$ node template-tag-hex.js\nA:0xa B:0xff C:nnn\n<\/pre>\nhex\u3068\u3044\u3046\u95a2\u6570\u3092\u5b9a\u7fa9\u3057\u307e\u3057\u305f\u3002hex\u95a2\u6570\u306e\u4e2d\u3067\u306f\u3001values\u306e\u65b9\u3060\u3051\u309216\u9032\u6570\u306b\u5909\u63db\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n<br \/>\n\u5b9f\u884c\u7d50\u679c\u306f\u3001strings\u3068values\u3092\u4ea4\u4e92\u306b\u7d44\u307f\u5408\u305b\u3066\u3044\u307e\u3059\u304c\u3001\u96e3\u3057\u304f\u306a\u3044\u3051\u3069\u3061\u3087\u3063\u3068\u9762\u5012\u306a\u51e6\u7406\u3067\u3059\u3002<br \/>\n<br \/>\n\u305d\u3053\u3067\u3001<a href=\"https:\/\/developer.mozilla.org\/ja\/docs\/Web\/JavaScript\/Reference\/Global_Objects\/String\/raw\" target=\"_blank\">String.raw<\/a>\u3068\u3044\u3046\u7d44\u307f\u8fbc\u307f\u306e\u95a2\u6570\u3092\u7528\u3044\u307e\u3059\u3002String.raw\u306f\u3001\u30a8\u30b9\u30b1\u30fc\u30d7\u6587\u5b57\u3092\u5909\u63db\u3055\u305b\u305a\u306b\u751f\u306e\u6587\u5b57\u5217\u3092\u51fa\u529b\u3059\u308b\u306e\u3067\u4fbf\u5229\u3067\u3059\u3002\u30c7\u30d5\u30a9\u30eb\u30c8\u306e\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u95a2\u6570\u306e\u3088\u3046\u306b\u52d5\u4f5c\u3057\u9023\u7d50\u51e6\u7406\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n<br \/>\n\u3084\u3084\u3053\u3057\u3044\u9023\u7d50\u51e6\u7406\u306fString.raw\u306b\u4efb\u305b\u3066\u304a\u3051\u3070\u3001\u3053\u3053\u3067\u306f\u4ee3\u7528\u5f0f\u90e8\u5206(\u3053\u3053\u3067\u306f\u300c10\u300d\u300c255\u300d\u300cnnn\u300d)\u3092\u5909\u63db\u3059\u308b\u3053\u3068\u3060\u3051\u3092\u8003\u3048\u3089\u308c\u3066\u3001\u6c17\u6301\u3061\u304c\u697d\u3067\u3059\u3002<br \/>\n<br \/>\nJavaScript\u3067\u306f\u3001\u30d0\u30a4\u30ca\u30ea\u3092\u6271\u3046\u3053\u3068\u3082\u5897\u3048\u3066\u304d\u305f\u304b\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\n\u4f8b\u3048\u3070\u3001\u753b\u50cf\u3084\u97f3\u58f0\u3001\u81ea\u4f5c\u306e\u5f62\u5f0f\u306e\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u306e\u30d0\u30a4\u30ca\u30ea\u30d5\u30a1\u30a4\u30eb\u3092\u89e3\u6790\u3057\u3066\u3001\u30d8\u30c3\u30c0\u304b\u3089\u60c5\u5831\u3092\u53d6\u308a\u51fa\u3059\u3068\u304d\u3084\u3001\u81ea\u5206\u3067\u30d0\u30a4\u30ca\u30ea\u30d5\u30a1\u30a4\u30eb\u3092\u7d44\u307f\u7acb\u3066\u308b\u5834\u5408\u3067\u3059\u3002\u305d\u306e\u969b\u3001\u3053\u306e\u3088\u3046\u306a\u30bf\u30b0\u3092\u7528\u610f\u3057\u3066\u304a\u3051\u3070\u300116\u9032\u6570\u3067\u306e\u51fa\u529b\u3092\u7c21\u5358\u306b\u78ba\u8a8d\u3067\u304d\u308b\u306e\u3067\u3001\u30c7\u30d0\u30c3\u30b0\u306b\u4fbf\u5229\u3060\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\n<h3>\u6700\u5f8c\u306b<\/h3>\n\u6e21\u3055\u308c\u305f\u4ee3\u7528\u5f0f\u90e8\u5206\u306b\u5bfe\u3057\u3066\u52a0\u5de5\u3092\u3059\u308b\u5834\u5408\u306b\u306f\u3001\u4f7f\u3048\u308b\u6a5f\u80fd\u3060\u3068\u601d\u3044\u307e\u3059\u3002\u3046\u307e\u304f\u5229\u7528\u3067\u304d\u308b\u72b6\u6cc1\u306f\u9650\u3089\u308c\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u304c\u3001\u77e5\u3089\u306a\u3051\u308c\u3070\u4f7f\u3048\u306a\u3044\u306e\u3067\u3001\u3053\u308c\u3092\u6a5f\u306b\u5fc3\u306e\u7247\u9685\u306b\u7f6e\u3044\u3066\u3044\u305f\u3060\u304d\u305f\u3044\u3067\u3059\u3002<br \/>\n<br \/>\n<a href=\"http:\/\/www.key-p.com\/recruit\/\" target=\"new\">\u30ad\u30fc\u30fb\u30dd\u30a4\u30f3\u30c8\u3067\u306f\u3001JavaScirpt\u304c\u5927\u597d\u304d\u306a\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u52df\u96c6\u3057\u3066\u3044\u307e\u3059\u3002<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>t\u3067\u3059\u3002 JavaScript\u306eES2015\u3067\u8ffd\u52a0\u3055\u308c\u305f\u3001\u30c6\u30f3\u30d7\u30ec\u30fc\u30c8\u6587\u5b57\u5217\u306e\u30bf &hellip; <a href=\"https:\/\/www.key-p.com\/blog\/staff\/archives\/106015\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":40,"featured_media":106071,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[16],"tags":[],"jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts\/106015"}],"collection":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/users\/40"}],"replies":[{"embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/comments?post=106015"}],"version-history":[{"count":24,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts\/106015\/revisions"}],"predecessor-version":[{"id":106239,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/posts\/106015\/revisions\/106239"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/media\/106071"}],"wp:attachment":[{"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/media?parent=106015"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/categories?post=106015"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.key-p.com\/blog\/staff\/wp-json\/wp\/v2\/tags?post=106015"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}