{"id":3979,"date":"2023-02-20T04:39:48","date_gmt":"2023-02-19T19:39:48","guid":{"rendered":"https:\/\/engineering.webstudio168.jp\/?p=3979"},"modified":"2023-02-20T04:39:49","modified_gmt":"2023-02-19T19:39:49","slug":"ternary-operator","status":"publish","type":"post","link":"https:\/\/engineering.webstudio168.jp\/blog\/ternary-operator\/","title":{"rendered":"JavaScript\u306e\u4e09\u9805\u6f14\u7b97\u5b50\u304c\u5206\u304b\u308a\u306b\u304f\u304f\u3066\u767a\u72c2\u3059\u308b\u304b\u305f\u3078\uff5e\u4e09\u9805\u6f14\u7b97\u5b50\u3068\u306f\u306a\u306b\u304b\u3001\u899a\u3048\u65b9\u3068\u30e1\u30ea\u30c3\u30c8\u306f\u4f55\u304b"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/ternary-operator\/#%E3%81%9D%E3%82%82%E3%81%9D%E3%82%82%E4%B8%89%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%81%A8%E3%81%AF%E4%BD%95%E3%81%8B\" >\u305d\u3082\u305d\u3082\u4e09\u9805\u6f14\u7b97\u5b50\u3068\u306f\u4f55\u304b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/ternary-operator\/#%E4%B8%89%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%81%AE%E4%BD%BF%E3%81%84%E6%96%B9\" >\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/ternary-operator\/#%E4%B8%89%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%81%AE%E8%A6%9A%E3%81%88%E6%96%B9%E3%80%80%E6%9D%A1%E4%BB%B6%EF%BC%9F%E3%82%B7%E3%83%B3%E3%82%B3%E3%83%AD%E3%82%AE\" >\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u899a\u3048\u65b9\u3000\u6761\u4ef6\uff1f\u30b7\u30f3\u30b3\u30ed\u30ae<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/ternary-operator\/#%E3%81%A9%E3%82%93%E3%81%AA%E5%A0%B4%E9%9D%A2%E3%81%A7%E4%BE%BF%E5%88%A9%E3%81%AA%E3%81%AE%E3%81%8B%E5%85%B7%E4%BD%93%E7%9A%84%E3%81%AB\" >\u3069\u3093\u306a\u5834\u9762\u3067\u4fbf\u5229\u306a\u306e\u304b\u5177\u4f53\u7684\u306b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/ternary-operator\/#%E5%85%A5%E3%82%8C%E5%AD%90%E3%81%8C3%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%82%92%E5%AE%B3%E6%82%AA%E3%81%AB%E6%9B%BF%E3%81%88%E3%81%9F\" >\u5165\u308c\u5b50\u304c3\u9805\u6f14\u7b97\u5b50\u3092\u5bb3\u60aa\u306b\u66ff\u3048\u305f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/engineering.webstudio168.jp\/blog\/ternary-operator\/#%E3%81%BE%E3%81%A8%E3%82%81\" >\u307e\u3068\u3081<\/a><\/li><\/ul><\/nav><\/div>\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-0.js\" data-lang=\"JavaScript\"><code>(\u6761\u4ef6) ? \u771f\/true\u306e\u5834\u5408 : \u507d\/false\u306e\u5834\u5408;<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u66f8\u304d\u65b9\u306f\u6700\u9069\u89e3\u306f\u5b58\u5728\u3059\u308b\u3082\u306e\u306e\u7d76\u5bfe\u6b63\u3067\u3042\u308b\u3053\u3068\u306f\u3042\u307e\u308a\u306a\u3044\uff08\u69cb\u6587\u4ee5\u5916\u306e\u8a71\uff09\u3068\u500b\u4eba\u7684\u306b\u306f\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u6700\u305f\u308b\u3082\u306e\u304c\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u304b\u4f7f\u308f\u306a\u3044\u304b\u3084\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3059\u308b\u304b\u3057\u306a\u3044\u304b\u3067\u3001\u3053\u308c\u306f\u7d50\u5c40\u597d\u307f\u306e\u554f\u984c\u306b\u884c\u304d\u7740\u304f\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u3053\u3093\u306a\u5206\u304b\u308a\u306b\u304f\u3044\u8a18\u8ff0\u3059\u3093\u306a\u300d\u6d3e\u3068\u300c\u52b9\u7387\u7684\u3067\u3044\u3044\u3058\u3083\u3093\u300d\u6d3e\u306b\u5206\u304b\u308c\u307e\u3059\u3088\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3001\u3053\u3046\u3057\u305f\u307b\u3046\u304c\u8a18\u8ff0\u304c\u30b9\u30c3\u30ad\u30ea\u3059\u308b\u3093\u3058\u3083\u306a\u3044\u304b\uff1f\u3068\u3044\u3046\u8ad6\u70b9\u306b\u81f3\u308b\u3053\u3068\u304c\u307b\u3068\u3093\u3069\u306a\u306e\u3067\u300c\u3058\u3083\u3042\u3069\u3063\u3061\u304c\u30b9\u30c3\u30ad\u30ea\u3059\u308b\u306e\uff1f\u300d\u3068\u3044\u3046\u89b3\u70b9\u3067\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u304b\u307f\u7815\u3044\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%81%9D%E3%82%82%E3%81%9D%E3%82%82%E4%B8%89%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%81%A8%E3%81%AF%E4%BD%95%E3%81%8B\"><\/span>\u305d\u3082\u305d\u3082\u4e09\u9805\u6f14\u7b97\u5b50\u3068\u306f\u4f55\u304b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u9805\u6f14\u7b97\u5b50\u306f3\u3064\u306e\u30aa\u30da\u30e9\u30f3\u30c9\u3092\u3068\u308b\u6f14\u7b97\u5b50\u3067\u3059\u3002\u6761\u4ef6\u3001\u771f\u306e\u5834\u5408\u3001\u507d\u306e\u5834\u5408\u306e\u5206\u5c90\u30921\u884c\u3067\u66f8\u304f\u3053\u3068\u304c\u51fa\u6765\u307e\u3059\u3002if()\u6587\u3067\u306f\u3001\u6539\u884c\u3092\u542b\u3081\u6700\u4f4e5\u884c\u304b\u304b\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b21\u306e\u4f8b\u3092\u898b\u3066\u898b\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-1.js\" data-lang=\"JavaScript\"><code>if(A &lt;= 5) {\n  console.log(&quot;A\u30cf5\u4ee5\u4e0a\u30c7\u30b9&quot;);\n} else {\n  console.log(&quot;A\u30cf5\u672a\u6e80\u30c7\u30b9&quot;);\n}<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u666e\u901a\u306eif()\u6587\u3067\u3059\u30025\u884c\u4f7f\u3063\u3066\u3044\u308b\u306e\u304c\u308f\u304b\u308a\u307e\u3059\u3002\uff08\u6b63\u78ba\u306b\u306f1\u884c\u306b\u3082\u51fa\u6765\u307e\u3059\u304c\u3001\u53ef\u8aad\u6027\u304c\u60aa\u304f\u4f7f\u3044\u7269\u306b\u306a\u308a\u307e\u305b\u3093\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8a66\u3057\u306b1\u884c\u306b\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-1.js\" data-lang=\"JavaScript\"><code>if(A &lt;= 5) { console.log(&quot;A\u30cf5\u4ee5\u4e0a\u30c7\u30b9&quot;); } else { console.log(&quot;A\u30cf5\u672a\u6e80\u30c7\u30b9&quot;); }<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3042\u308c\u3001\u3044\u3051\u308b\u3001\u5225\u306b\u8aad\u3081\u308b\uff01\uff08\u7b11\uff09\u3068\u3044\u3046\u3053\u3068\u3082\u7121\u3044\u4f53\u3067\u304a\u9858\u3044\u3057\u307e\u3059\u3002\u4e00\u5fdc\u898b\u306b\u304f\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u306e\u3071\u3063\u3068\u898b\u5206\u304b\u308a\u306b\u304f\u3044\u30b3\u30fc\u30c9\u3092\u3082\u3063\u3068\u30b7\u30f3\u30d7\u30eb\u306b\u3059\u308b\u306e\u304c\u4e09\u9805\u6f14\u7b97\u5b50\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%B8%89%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%81%AE%E4%BD%BF%E3%81%84%E6%96%B9\"><\/span>\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u4f7f\u3044\u65b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f7f\u3044\u65b9\u3092\u898b\u308b\u524d\u306b\u5148\u307b\u3069\u306e1\u884c\u306b\u3057\u305fif()\u6587\u3092\u898b\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-1.js\" data-lang=\"JavaScript\"><code>if(A &lt;= 5) { console.log(&quot;A\u30cf5\u4ee5\u4e0a\u30c7\u30b9&quot;); } else { console.log(&quot;A\u30cf5\u672a\u6e80\u30c7\u30b9&quot;); }<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3092\u4e09\u9805\u6f14\u7b97\u5b50\u306b\u7f6e\u304d\u63db\u3048\u308b\u3068<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-2.js\" data-lang=\"JavaScript\"><code>(A &lt;= 5) ? console.log(&quot;A\u30cf5\u4ee5\u4e0a\u30c7\u30b9&quot;) : console.log(&quot;A\u30cf5\u672a\u6e80\u30c7\u30b9&quot;);<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u898b\u3084\u3059\u3044\u306e\u304b\u898b\u3084\u3059\u304f\u306a\u3044\u306e\u304b\u5206\u304b\u308a\u3065\u3089\u3044\u4f8b\u3092\u6319\u3052\u3066\u3057\u307e\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u524d\u306e\u30b3\u30fc\u30c9\u3068\u6bd4\u3079\u308b\u3068<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>if\u304c\u6d88\u3048\u3066\u3044\u308b<\/li>\n\n\n\n<li>{}\u304c\u6d88\u3048\u3066\u3044\u308b<\/li>\n\n\n\n<li>else\u304c\u306a\u3044<\/li>\n\n\n\n<li>\u300c;\uff08\u30bb\u30df\u30b3\u30ed\u30f3\uff09\u300d\u304c\u672b\u5c3e\u306b\u4ed8\u3044\u3066\u3044\u308b\n<ul class=\"wp-block-list\"><\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a184\u70b9\u3067\u8a00\u8449\u304c\u524a\u3089\u308c\u3066\u3044\u308b\u306e\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u69cb\u6587\u3068\u3057\u3066\u8aac\u660e\u3092\u4ea4\u3048\u3066\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u66f8\u3044\u3066\u307f\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-0.js\" data-lang=\"JavaScript\"><code>(\u6761\u4ef6) ? \u771f\/true\u306e\u5834\u5408 : \u507d\/false\u306e\u5834\u5408;<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u304c\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u57fa\u672c\u5f62\u3067\u3059\u3002\u4f55\u3082\u96e3\u3057\u304f\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3067\u3082\u3001\u305d\u3046\u3044\u3046\u3053\u3068\u3058\u3083\u306a\u304f\u3066\u305d\u3082\u305d\u3082\u5206\u304b\u308a\u306b\u304f\u3044\u3093\u3060\u3088\u306a\u3041\u3001\u3063\u3066\u65b9\uff01\u3061\u3087\u3063\u3068\u5f85\u3063\u3066\u304f\u3060\u3055\u3044\u3002\u304a\u305d\u3089\u304f\u305d\u306e\u300c\u305d\u3082\u305d\u3082\u5206\u304b\u308a\u306b\u304f\u3044\u300d\u3063\u3066\u3044\u3046\u306e\u306f\u666e\u6bb5\u4f7f\u308f\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">JavaScript\uff08\u3042\u308b\u3044\u306f\u6700\u521d\u306b\u899a\u3048\u305f\u8a00\u8a9e\uff09\u3092\u52c9\u5f37\u3057\u305f\u3066\u306e\u3001\u82e5\u304b\u308a\u3057\u65e5\u3005\u3092\u601d\u3044\u51fa\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u300cif()\u6587\u3063\u3066\u306a\u3093\u3060\u3088\u300d\u3063\u3066\u306a\u3063\u3066\u307e\u305b\u3093\u3067\u3057\u305f\uff1f\u300c\u5909\u6570\u3063\u3066\u306a\u3093\u3060\u3088\u300d\u3063\u3066\u306a\u3063\u3066\u307e\u305b\u3093\u3067\u3057\u305f\uff1f\u305d\u308c\u3068\u4eca\u306e\u72b6\u6cc1\u4f3c\u3066\u3044\u307e\u305b\u3093\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3042\u308b\u7a0b\u5ea6\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u51fa\u6765\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3001\u4ed5\u4e8b\u3082\u3082\u3089\u3048\u3066\u30d0\u30ea\u30d0\u30ea\u66f8\u3051\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3002\u305d\u3093\u306a\u4e2d\u305f\u307e\u305f\u307e\u898b\u305f\u4eba\u306e\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306b\u898b\u77e5\u3089\u306c\u66f8\u304d\u65b9\u304c\u3001\u3001\u3053\u3046\u3044\u3046\u3053\u3068\u305f\u307e\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u4f55\u66f8\u3044\u3066\u308b\u306e\u304b\u5206\u304b\u3089\u3093w\u300d\u3063\u3066\u306a\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u8208\u5473\u3084\u597d\u5947\u5fc3\u304c\u82bd\u751f\u3048\u308b\u304b\u3001\u3082\u3057\u304f\u306f\u5acc\u60aa\u611f\u304c\u751f\u307e\u308c\u308b\u304b\u306f\u4eba\u305d\u308c\u305e\u308c\u3067\u3059\u3002\u82e5\u304b\u308a\u3057\u9803\u306e\u50d5\u306f\u5f8c\u8005\u3067\u300c\u3053\u3093\u306a\u56de\u308a\u304f\u3069\u3044\u66f8\u304d\u65b9\u3059\u308b\u306a\u3088\u3001if()\u6587\u4f7f\u3048if()\u6587\u3092\u300d\u3068\u3044\u3046\u5929\u90aa\u9b3c\u306a\u8003\u3048\u306b\u8972\u308f\u308c\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u304d\u3063\u3068\u3053\u306e\u6587\u7ae0\u306b\u597d\u610f\u7684\u306a\u65b9\u306f\u300cif()\u6587\u4f7f\u3048\u3088\u300d\u6d3e\u304c\u591a\u3044\u3093\u3058\u3083\u306a\u3044\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E4%B8%89%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%81%AE%E8%A6%9A%E3%81%88%E6%96%B9%E3%80%80%E6%9D%A1%E4%BB%B6%EF%BC%9F%E3%82%B7%E3%83%B3%E3%82%B3%E3%83%AD%E3%82%AE\"><\/span>\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u899a\u3048\u65b9\u3000\u6761\u4ef6\uff1f\u30b7\u30f3\u30b3\u30ed\u30ae<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">if()\u6587\u6d3e\u306e\u65b9\u306f\u3068\u308a\u3042\u3048\u305a3\u9805\u6f14\u7b97\u5b50\u3092\u5b9f\u969b\u306e\u696d\u52d9\u3067\u4f7f\u3063\u3066\u307f\u308b\u3053\u3068\u3092\u304a\u52e7\u3081\u3057\u307e\u3059\u3002\u3042\u308c\u3001\u3053\u308c\u306a\u3093\u304b\u4fbf\u5229\u306a\u3093\u3058\u3083\u3001\u3001\u3001\u307f\u3093\u306a\u3082\u4f7f\u3063\u305f\u3089\uff1f\u3063\u3066\u306a\u308b\u3053\u3068\u306e\u65b9\u304c\u591a\u3044\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3067\u3059\u304c\u3001\u3044\u3056\u4f7f\u304a\u3046\u3068\u3059\u308b\u3068\u69cb\u6587\u306e\u8a18\u53f7\u306e\u4f4d\u7f6e\u3060\u3063\u305f\u308a\u3001\u771f\u507d\u306e\u4f4d\u7f6e\u95a2\u4fc2\u304c\u304a\u307c\u308d\u3052\u3067\u30b0\u30b0\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u6bce\u56de\u3053\u308c\u3060\u3068\u3046\u30fc\u3093\u3001\u3081\u3093\u3069\u304f\u3055\u3044\u3063\u3066\u306a\u308a\u304c\u3061\u306a\u306e\u3067\u3044\u3063\u305d\u306e\u3053\u3068\u30b4\u30ed\u5408\u308f\u305b\u3067\u899a\u3048\u3066\u3057\u307e\u3044\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3070\u3063\u304b\u308a\u306f\u8a18\u53f7\u306e\u610f\u5473\u3092\u8003\u3048\u51fa\u3059\u3068\u6cbc\u306b\u30cf\u30de\u3063\u3066\u6642\u9593\u304c\u304b\u304b\u308a\u307e\u3059\u3002\u50d5\u306f\u4ee5\u4e0b\u306b\u4ed5\u4e8b\u306b\u6642\u9593\u3092\u4f7f\u308f\u306a\u3044\u304b\u3092\u30e2\u30c3\u30c8\u30fc\u306b\u751f\u304d\u3066\u3044\u308b\u4eba\u9593\u306a\u306e\u3067\u4e00\u77ac\u8003\u3048\u3066\u3081\u3093\u3069\u304f\u3055\u305d\u3046\u306a\u3082\u306e\u306f\u3069\u308c\u3060\u3051\u7c21\u5358\u306b\u51fa\u6765\u308b\u304b\u3092\u8003\u3048\u308b\u30af\u30bb\u304c\u3064\u3044\u3066\u3057\u307e\u3063\u3066\u3044\u307e\u3059\u3002\u3082\u3061\u308d\u3093\u597d\u304d\u306a\u8a00\u8449\u306f\u300c\u52b9\u7387\u5316\u300d\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305d\u3053\u3067\u6d3b\u8e8d\u3059\u308b\u306e\u304c\u300c\u6761\u4ef6\uff1f\u30b7\u30f3\u30b3\u30ed\u30ae\u300d\u3067\u3059\u3002\u30b7\u30f3\u30b3\u30ed\u30ae\u304c\u306a\u306b\u3092\u6307\u3059\u306e\u304b\u3001\u3069\u3093\u306a\u9670\u306e\u56e3\u4f53\u306a\u306e\u304b\u3001\u3069\u3053\u306e\u5bc6\u8f38\u7d44\u7e54\u306a\u306e\u304b\u306f\u5206\u304b\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u30b7\u30f3\u30b3\u30ed\u30ae\u306f\u30b7\u30f3\u30b3\u30ed\u30ae\u306a\u306e\u3067\u3059\u3002\u30b7\u30f3\u30b3\u30ed\u30ae\u306e\u5b58\u5728\u305d\u306e\u3082\u306e\u304c\u4eba\u3005\u306e\u306e\u751f\u6d3b\u3092\u652f\u3048\u3066\u3044\u308b\u306e\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u3044\u308b\u6642\u306b\u3001\u300c\u3053\u306e\u6761\u4ef6\u306a\u3093\u3060\u3051\u3069\u2025\u2025\u300d\u3068\u8033\u306b\u3057\u305f\u3068\u304d\u306f\u65e2\u306b\u30b7\u30f3\u30b3\u30ed\u30ae\u3067\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u300c\u6761\u4ef6?\u300d\u3068\u3044\u3063\u305f\u3089\u3082\u3046\u53cd\u5c04\u7684\u306b\u300c\u30b7\u30f3\u30b3\u30ed\u30ae\u300d\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3068\u3044\u3046\u5197\u8ac7\u306f\u3055\u3066\u304a\u304d\u3001\u300c\u6761\u4ef6\uff1f\u30b7\u30f3\u30b3\u30ed\u30ae\u300d\u306f\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u5de6\u304b\u3089\u9806\u306e\u4f4d\u7f6e\u3092\u8868\u3057\u3066\u3044\u307e\u3059\u3002\u300c\uff08<strong>\u6761\u4ef6<\/strong>\uff09<strong>? \u771f : \u507d<\/strong>;\u300d\u3067\u3059\u306d\u3002\u300c\u6761\u4ef6\uff1f\u300d\u306f\u6761\u4ef6\u306e\u5f8c\u308d\u306b\u306f\u300c?\u300d\u30af\u30a8\u30b9\u30c1\u30e7\u30f3\u30de\u30fc\u30af\u304c\u6765\u307e\u3059\u3002\u305d\u306e\u6b21\u306e\u300c\u30b7\u30f3\u30b3\u30ed\u30ae\u300d\u306f\u300c\u771f\u300d\u306e\u5834\u5408\u3001\u300c\uff1a\u300d<strong>\u30b3\u30ed<\/strong>\u30f3\u3001\u300c\u507d\u300d\u306e\u5834\u5408\u3068\u7d9a\u304d\u307e\u3059\u3002\u30b7\u30f3\u30b3\u30ed\u30ae\u306b\u306f\u300c;\uff08\u30bb\u30df\u30b3\u30ed\u30f3\uff09\u300d\u304c\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u3067\u3059\u304c\u3001JavaScript\u306e\u57fa\u672c\u30eb\u30fc\u30eb\u306e\u5206\u306e\u672b\u5c3e\u306b\u306f\u300c;\u300d\u3063\u3066\u3053\u3068\u3067\u5fc5\u305a\u4ed8\u3051\u308b\u306e\u3067\u5272\u611b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3053\u308c\u3067\u3082\u3046\u6761\u4ef6\u53cd\u5c04\u7684\u306b\u300c\u6761\u4ef6\uff1f\u300d\u300c\u30b7\u30f3\u30b3\u30ed\u30ae\u300d\u3068\u3044\u3046\u8a00\u8449\u306e\u30ad\u30e3\u30c3\u30c1\u30dc\u30fc\u30eb\u304c\u51fa\u6765\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u305f\u3002\u305c\u3072\u3001\u6761\u4ef6?\u30b7\u30f3\u30b3\u30ed\u30ae\u30b2\u30fc\u30e0\u3092\u304a\u53cb\u9054\u3068\u3084\u3063\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%81%A9%E3%82%93%E3%81%AA%E5%A0%B4%E9%9D%A2%E3%81%A7%E4%BE%BF%E5%88%A9%E3%81%AA%E3%81%AE%E3%81%8B%E5%85%B7%E4%BD%93%E7%9A%84%E3%81%AB\"><\/span>\u3069\u3093\u306a\u5834\u9762\u3067\u4fbf\u5229\u306a\u306e\u304b\u5177\u4f53\u7684\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u4f8b\u3092\u6319\u3052\u307e\u3057\u305f\u304c\u307e\u3060\u307e\u3060\u4f7f\u3044\u52dd\u624b\u306e\u826f\u3055\u304c\u4f1d\u308f\u3089\u306a\u3044\u306f\u305a\u306a\u306e\u3067\u3001\u4eca\u5ea6\u306f\u5b9f\u969b\u306e\u30b3\u30fc\u30c9\u3067\u793a\u3057\u3066\u307f\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-3.js\" data-lang=\"JavaScript\"><code>let hantei = true;\nlet userRank;\nlet shinkorogi = hantei ? userRank = &quot;SS&quot; : userRank = &quot;F&quot;;\nconsole.log(&#39;\u3042\u306a\u305f\u306e\u30b7\u30f3\u30b3\u30ed\u30ae\u30e9\u30f3\u30af\u306f&quot; + shinkorogi + &quot;\u3067\u3059&quot;);<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u5148\u307b\u3069\u306e\u6761\u4ef6\uff1f\u30b7\u30f3\u30b3\u30ed\u30ae\u306e\u6cd5\u5247\u306b\u5f53\u3066\u306f\u3081\u308c\u3070\u96e3\u306a\u304f\u3088\u3081\u308b\u306e\u3067\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002\u3053\u3053\u3067if()\u6587\u3092\u4f7f\u3046\u3088\u308a\u3082\u30aa\u30a4\u30b7\u30a4\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u306e\u304c\u304a\u5206\u304b\u308a\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u884c\u6570\u304c\u6291\u3048\u3089\u308c\u308b<\/li>\n\n\n\n<li>if()\u6587\u3067\u306f\u51fa\u6765\u306a\u3044\u3001\u300c\u5909\u6570\u300d\u306b\u5024\u3092\u76f4\u4ee3\u5165\u51fa\u6765\u308b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u30c7\u30e1\u30ea\u30c3\u30c8\u3068\u3057\u3066\u306f<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u3042\u307e\u308a\u7406\u89e3\u3057\u3066\u3044\u306a\u3044\u4eba\u304c\u30bd\u30fc\u30b9\u3092\u8aad\u3080\u306e\u306b\u82e6\u52b4\u3059\u308b\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u30c7\u30e1\u30ea\u30c3\u30c8\u3092\u3044\u304b\u306b\u6f70\u3059\u304b\u304c\u8ab2\u984c\u3067\u3059\u306d\u3002\u3067\u3082\u3082\u3046\u305d\u3093\u306a\u3053\u3068\u306f\u7c21\u5358\u3067\u3059\u3002\u3042\u306a\u305f\u304c\u6559\u3048\u3066\u3042\u3052\u308c\u3070\u3044\u3044\u3093\u3067\u3059\u3002\u3055\u3063\u304d\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u7fd2\u5f97\u3057\u305f\u3053\u3068\u3068\u540c\u3058\u3053\u3068\u3092\u4f7f\u3063\u3066\u5e83\u3081\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002\u6761\u4ef6\uff1f<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E5%85%A5%E3%82%8C%E5%AD%90%E3%81%8C3%E9%A0%85%E6%BC%94%E7%AE%97%E5%AD%90%E3%82%92%E5%AE%B3%E6%82%AA%E3%81%AB%E6%9B%BF%E3%81%88%E3%81%9F\"><\/span>\u5165\u308c\u5b50\u304c3\u9805\u6f14\u7b97\u5b50\u3092\u5bb3\u60aa\u306b\u66ff\u3048\u305f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9f\u306f3\u9805\u6f14\u7b97\u5b50\u3063\u3066\u5165\u308c\u5b50\u306b\u51fa\u6765\u308b\u3093\u3067\u3059\u3088\u306d\u3002<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"ternary-operator-5.js\" data-lang=\"JavaScript\"><code> condition1 ? value1\u3000: condition2 ? value2\u3000: condition3 ? value3\u3000: value4;<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f55\u66f8\u3044\u3066\u3042\u308b\u304b\u5206\u304b\u308a\u307e\u3059\u304b??\u50d5\u306f\u300cif()\u3067\u304b\u3051\u3088\u30ab\u3007\u91ce\u90ce\u300d\u3068\u601d\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u3053\u3063\u3061\u306b\u304b\u3093\u3057\u3066\u306f\u4eca\u3082if()\u63a8\u5968\u306e\u65b9\u304c\u3044\u3044\u3058\u3083\u3001\u3068\u3059\u3089\u611f\u3058\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ed5\u65b9\u306a\u3044\u306e\u3067\u3053\u308c\u3092\u8aad\u307f\u89e3\u304f\u3093\u3067\u3059\u304c\u3001\u3058\u3064\u306f\u3001\u7d50\u69cb\u5bb9\u6613\u306b\u3067\u304d\u3061\u3083\u3046\u3093\u3067\u3059\u3088\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0a\u8a18\u4f8b\u3092\u65e5\u672c\u8a9e\u306b\u3059\u308b\u3068<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">condition1\u304c\u771f\u3060\u3063\u305f\u3089value1\u306d\u3001\u507d\u3060\u3063\u305f\u3089\u3001\u3046\u30fc\u3093\u3001\u3001\u3001\u3042\u3001\u3053\u3063\u3061\u306econdition2\u3067\u6c7a\u3081\u308b\u308f\u3002condition2\u304c\u771f\u3060\u3063\u305f\u3089value2\u3067\u3002\u507d\u3060\u3063\u305f\u3089\u3001\u3046\u30fc\u3093\u3001\u6c7a\u3081\u304b\u306d\u308b\u306a\u3042\u3001\u3058\u3083condition3\u304c\u771f\u3060\u3063\u305f\u3089valu3\u3067\u3001\u507d\u3060\u3063\u305f\u3089value4\u306b\u3057\u307e\u3059\uff01\uff08\u30c9\u30e4\uff09<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u307f\u305f\u3044\u306a\u611f\u3058\u306b\u306a\u308a\u307e\u3059\u304b\u306d\u3002\u5225\u306b\u6575\u610f\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3001\u3053\u308c\u3084\u308b\u3093\u3060\u3063\u305f\u3089if()\u6587\u3067\u3088\u304f\u306d\uff1f\u3063\u3066\u306a\u308b\u3093\u3067\u3059\u3088\u306d\u3002\u3002\u3002\u305f\u3076\u3093\u540c\u3058\u8003\u3048\u306e\u65b9\u591a\u3044\u6c17\u304c\u3059\u308b\u3002\u4e0a\u306e\u30b5\u30f3\u30d7\u30eb\u3092if()\u6587\u306b\u3059\u308b\u3068\u3001<\/p>\n\n\n\n<div class=\"hcb_wrap\"><pre class=\"prism undefined-numbers lang-js\" data-file=\"if-ver.js\" data-lang=\"JavaScript\"><code> if (condition1) { return value1; }\n    else if (condition2) { return value2; }\n    else if (condition3) { return value3; }\n    else { return value4; }<\/code><\/pre><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">\u3048\u3001\u3053\u308c\u3067\u826f\u304f\u306a\u3044\uff1f\u3060\u3063\u3066\u3055\u3063\u304d\u306e\u3001condition1\u3001condition2\u3001condition3\u304c\u51fa\u308b\u305f\u3073\u306b\u300c\u6761\u4ef6\uff1f\u300d\u300c\u30b7\u30f3\u30b3\u30ed\u30ae\u2026\u3060\u3068\u300d\u304c\u51fa\u3066\u6c17\u3058\u3083\u3046\u3093\u3067\u3001\u304a\u3058\u3055\u3093\u7126\u3063\u3061\u3083\u3046\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u521d\u304b\u3089if()\u5206\u3067\u5206\u304b\u308a\u3084\u3059\u304f\u66f8\u3044\u3066\u304f\u308c\u308c\u3070\u3053\u3093\u306a\u3053\u3068\u306a\u3089\u3093\u3068\u601d\u3046\u3093\u3060\u3051\u3069\u2026\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u3069\u3046\u3082\u4e09\u9805\u6f14\u7b97\u5b50\u306e\u5165\u308c\u5b50\u306f\u4f5c\u696d\u8005\u306e\u30af\u30bb\u304b\u3001\u81ea\u5df1\u6e80\u3001\u3042\u30c9\u30e4\u306b\u3057\u304b\u898b\u3066\u53d6\u308c\u306a\u304f\u3066\u3002<br>\u3067\u3082\u3001\u7686\u3055\u3093\u3001\u8aad\u3081\u307e\u3057\u305f\u3088\u306d\uff01\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u5927\u4f53\u308f\u304b\u308c\u3070\u30bd\u30fc\u30b9\u3082\u305a\u3044\u3076\u3093\u697d\u306b\u8aad\u3081\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E3%81%BE%E3%81%A8%E3%82%81\"><\/span>\u307e\u3068\u3081<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e09\u9805\u6f14\u7b97\u5b50\u306f\u5834\u5408\u306b\u3088\u3063\u3066\u306f\u975e\u5e38\u306b\u30b7\u30f3\u30d7\u30eb\u3067\u53ef\u8aad\u6027\u306b\u9577\u3051\u308b\u5834\u5408\u304c\u591a\u3044\u3088\u3046\u306b\u611f\u3058\u3066\u3044\u307e\u3059\u3002\u5165\u308c\u5b501\u56de\u306a\u3089\u8a31\u5bb9\u3059\u308b\u3063\u3066\u611f\u3058\u3067\u3059\u304b\u306d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u305f\u3060\u3001\u305d\u3082\u305d\u3082\u300c\u4e09\u9805\u6f14\u7b97\u5b50\u308f\u304b\u3089\u3093\uff01\u300d\u3068\u3044\u3046\u72b6\u614b\u304c\u3042\u307e\u308a\u3088\u308d\u3057\u304f\u306a\u3044\u306e\u3067\u4eca\u56de\u30b9\u30c3\u30ad\u30ea\u3057\u3066\u3082\u3089\u3048\u305f\u3089\u306a\u826f\u3044\u306a\u3041\u3068\u601d\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u66f8\u304d\u65b9\u306f\u6700\u9069\u89e3\u306f\u5b58\u5728\u3059\u308b\u3082\u306e\u306e\u7d76\u5bfe\u6b63\u3067\u3042\u308b\u3053\u3068\u306f\u3042\u307e\u308a\u306a\u3044\uff08\u69cb\u6587\u4ee5\u5916\u306e\u8a71\uff09\u3068\u500b\u4eba\u7684\u306b\u306f\u8003\u3048\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u6700\u305f\u308b\u3082\u306e\u304c\u4e09\u9805\u6f14\u7b97\u5b50\u3092\u4f7f\u3046\u304b\u4f7f\u308f\u306a\u3044\u304b\u3084\u3001\u30a2\u30ed\u30fc\u95a2\u6570\u306b\u3059\u308b\u304b\u3057\u306a\u3044\u304b\u3067\u3001\u3053\u308c\u306f\u7d50\u5c40\u597d\u307f\u306e\u554f\u984c\u306b\u884c\u304d\u7740\u304f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4026,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[55,43],"tags":[39,48],"class_list":["post-3979","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript","category-43","tag-39","tag-48"],"_links":{"self":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/3979","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/comments?post=3979"}],"version-history":[{"count":47,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/3979\/revisions"}],"predecessor-version":[{"id":4027,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/posts\/3979\/revisions\/4027"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/media\/4026"}],"wp:attachment":[{"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/media?parent=3979"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/categories?post=3979"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/engineering.webstudio168.jp\/blog\/wp-json\/wp\/v2\/tags?post=3979"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}