{"id":23300,"date":"2017-08-08T01:50:25","date_gmt":"2017-08-07T16:50:25","guid":{"rendered":"http:\/\/www.sejuku.net\/blog\/?p=23300"},"modified":"2024-05-06T11:42:29","modified_gmt":"2024-05-06T02:42:29","slug":"javascript%e3%81%aeboolean%e3%81%aeparse%e3%83%bb%e5%88%a4%e5%ae%9a%e3%81%aetips%ef%bc%81","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/23300","title":{"rendered":"\u3010JavaScript\u5165\u9580\u3011boolean\u578b\u306e\u4f7f\u3044\u65b9(\u6587\u5b57\u5217\u5909\u63db\/\u5224\u5b9a\/\u53cd\u8ee2)"},"content":{"rendered":"

\u3053\u3093\u306b\u3061\u306f\uff01Web\u30b3\u30fc\u30c0\u30fc\u30fb\u30d7\u30ed\u30b0\u30e9\u30de\u30fc\u306e\u8c9d\u539f\uff08@touhicomu<\/a>\uff09\u3067\u3059\u3002<\/p>\n

\u4eca\u65e5\u306f\u3001JavaScript\u306eboolean\u578b<\/strong><\/span>\u3078\u306e\u5909\u63db\u3001if\u5224\u5b9a\u3001\u771f\u507d\u5024\u5224\u5b9a\u3001\u53cd\u8ee2\u306a\u3069\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001<\/p>\n

\u30fb\u6587\u5b57\u5217\u578b\u304b\u3089boolean\u578b\u3078\u306e\u5909\u63db<\/strong><\/span>
\n\u30fb\u6570\u5024\u304b\u3089boolean\u578b\u3078\u306e\u5909\u63db<\/strong><\/span>
\n\u30fb\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089boolean\u578b\u3078\u306e\u5909\u63db<\/strong><\/span><\/p>\n

\u3068\u3044\u3046\u57fa\u672c\u7684\u306a\u5185\u5bb9\u304b\u3089\u3001<\/p>\n

\u30fbboolean\u306eif\u5224\u5b9a<\/strong><\/span>
\n\u30fbboolean\u5909\u6570\u306e\u53cd\u8ee2<\/strong><\/span>
\n\u30fb\u771f\u507d\u5024\u5224\u5b9a\u30fb\u6bd4\u8f03\u30fb\u53cd\u8ee2<\/strong><\/span>
\n\u30fbBoolean\u578b\u306e\u578b\u306e\u5224\u5b9a<\/strong><\/span><\/p>\n

\u306a\u3069\u306e\u5fdc\u7528\u7684\u306a\u4f7f\u3044\u65b9\u306b\u95a2\u3057\u3066\u3082\u5b66\u7fd2\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n

\u3053\u306e\u30da\u30fc\u30b8\u3067\u3001boolean\u578b\u3092\u3088\u304f\u628a\u63e1\u3057\u3066\u81ea\u5206\u306e\u30b9\u30ad\u30eb\u3068\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\uff01<\/p>\n

boolean\u578b\u3078\u306e\u5909\u63db<\/h2>\n

Boolean\u95a2\u6570\u3067\u6587\u5b57\u5217\u578b\u304b\u3089boolean\u578b\u3078\u5909\u63db<\/h3>\n

JavaScript\u306e\u6587\u5b57\u5217<\/strong><\/span>\u3092boolean\u578b<\/strong><\/span>\u3078Boolean\u95a2\u6570\u3067\u5909\u63db\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n

\u305f\u3060\u3057\u3001\u6ce8\u610f\u304c\u5fc5\u8981\u306a\u306e\u3067\u3059\u304c\u3001Boolean\u95a2\u6570\u306f\u3001"true"\u3092true\u3001"false"\u3092false<\/strong><\/span>\u306b\u306f\u5909\u63db\u3057\u307e\u305b\u3093\u3002<\/p>\n

\u6587\u5b57\u5217\u304c\u7a7a\u6587\u5b57""<\/strong><\/span>\u306e\u6642\u306e\u307ffalse<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u3001\u4ed6\u306e\u6587\u5b57\u5217<\/strong><\/span>\u306f\u5168\u3066true<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n

window.onload = function () {\r\n    var bool1 = Boolean("true");\r\n    var bool2 = Boolean("false");\r\n    var bool3 = Boolean("");\r\n    var bool4 = Boolean(" ");\r\n    var bool5 = Boolean("0");\r\n    var bool6 = Boolean("1");\r\n    var bool7 = Boolean("A");\r\n\r\n    console.log('Boolean("true")=' + bool1);\r\n    console.log('Boolean("false")=' + bool2);\r\n    console.log('Boolean("")=' + bool3);\r\n    console.log('Boolean(" ")=' + bool4);\r\n    console.log('Boolean("0")=' + bool5);\r\n    console.log('Boolean("1")=' + bool6);\r\n    console.log('Boolean("A")=' + bool7);\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Boolean("true") = true\r\nBoolean("false") = true\r\nBoolean("") = false\r\nBoolean(" ") = true\r\nBoolean("0") = true\r\nBoolean("1") = true\r\nBoolean("A") = true<\/pre>\n
\u4ee5\u4e0a\u306e\u3088\u3046\u306a\u5b9f\u884c\u7d50\u679c\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
parse\u95a2\u6570\u3092\u81ea\u4f5c\u3059\u308b\u65b9\u6cd5<\/h3>\n
\u6587\u5b57\u5217\u304c\u201dtrue\u201d<\/strong><\/span>\u306e\u969b\u306bboolean\u306etrue<\/strong><\/span>\u3001\u6587\u5b57\u5217\u304c\u305d\u308c\u4ee5\u5916\u306e\u5834\u5408\u306fboolean\u306efalse<\/strong><\/span>\u306b\u5909\u63db\u3059\u308bparse\u95a2\u6570<\/strong><\/span>\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u66f8\u3051\u307e\u3059\u3002<\/p>\n
window.onload = function () {\r\n    function parseStrToBoolean(str) {\r\n        \/\/ \u6587\u5b57\u5217\u3092\u5224\u5b9a\r\n        return (str == 'true') ? true : false;\r\n \r\n    }\r\n    var str1 = "true";\r\n    var str2 = "false";\r\n    console.log("bool str1 = " + parseStrToBoolean(str1));\r\n    console.log("bool str2 = " + parseStrToBoolean(str2));\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
bool str1 = true\r\nbool str2 = false<\/pre>\n
\u3053\u306e\u95a2\u6570\u3092\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3057\u3066\u4f7f\u7528\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u6570\u5024\u304b\u3089boolean\u578b\u3078\u306e\u5909\u63db<\/h3>\n
JavaScript\u306e\u6570\u5024\u578b<\/strong><\/span>\u3092boolean\u578b<\/strong><\/span>\u3078Boolean\u95a2\u6570\u3067\u5909\u63db\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n
1\u3001-1\u30010<\/strong><\/span>\u306a\u3069\u306e\u57fa\u672c\u7684\u306a\u6570\u5024\u306f\u30010\u4ee5\u5916\u306ftrue<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u30010\u306e\u5834\u5408\u306ffalse<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u3001Number.NaN<\/strong><\/span>\u306a\u3069\u306e\u6570\u5024\u30ea\u30c6\u30e9\u30eb\u306f\u3001NaN\u4ee5\u5916\u306ftrue<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u3001NaN\u306e\u5834\u5408\u306f0<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u307e\u3059\u3002<\/p>\n
window.onload = function () {\r\n    var bool10 = Boolean(1);\r\n    var bool11 = Boolean(-1);\r\n    var bool12 = Boolean(0);\r\n    var bool13 = Boolean(Number.NaN);\r\n    var bool14 = Boolean(Number.POSITIVE_INFINITY);\r\n    var bool15 = Boolean(Number.MAX_VALUE);\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Boolean(1) = true\r\nBoolean(-1) = true\r\nBoolean(0) = false\r\nBoolean(Number.NaN) = false\r\nBoolean(Number.POSITIVE_INFINITY) = true\r\nBoolean(Number.MAX_VALUE) = true<\/pre>\n
\u57fa\u672c\u7684\u306b\u300c\u5024\u304c\u306a\u3044\u300d\u3053\u3068\u3092\u793a\u30590\u3068NaN\u306e\u5834\u5408\u306ffalse\u306b\u5909\u63db\u3055\u308c\u308b<\/strong><\/span>\u3068\u899a\u3048\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304b\u3089boolean\u578b\u3078\u306e\u5909\u63db<\/h3>\n
JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b<\/strong><\/span>\u3092boolean\u578b<\/strong><\/span>\u3078Boolean\u95a2\u6570\u3067\u5909\u63db\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n
\u57fa\u672c\u7684\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u578b<\/strong><\/span>\u3092Boolean\u95a2\u6570\u3067\u5909\u63db\u3059\u308b\u3068\u3001bool\u5024\u306f\u3059\u3079\u3066true<\/strong><\/span>\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
window.onload = function () {\r\n   var bool20 = Boolean({ array: "abc" });\r\n    var bool21 = Boolean(new Object(1));\r\n    var bool22 = Boolean(new Object(null));\r\n    var bool23 = Boolean(new String("abc"));\r\n    var bool24 = Boolean(new String(""));\r\n    var bool25 = Boolean(new String(null));\r\n    var bool26 = Boolean(new Number(100));\r\n    var bool27 = Boolean(new Number(-1));\r\n    var bool28 = Boolean(new Number(0));\r\n    var bool29 = Boolean(new Number(Number.NaN));\r\n    var bool30 = Boolean(new Boolean(true));\r\n    var bool31 = Boolean(new Boolean(false));\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
Boolean({ array: "abc" }) = true\r\nBoolean(new Object(1)) = true\r\nBoolean(new Object(null)) = true\r\nBoolean(new String("abc")) = true\r\nBoolean(new String("")) = true\r\nBoolean(new String(null)) = true\r\nBoolean(new Number(100)) = true\r\nBoolean(new Number(-1)) = true\r\nBoolean(new Number(0)) = true\r\nBoolean(new Number(Number.NaN)) = true\r\nBoolean(new Boolean(true)) = true\r\nBoolean(new Boolean(false)) = true<\/pre>\n
new Boolean(false)<\/strong><\/span> \u3068\u6307\u5b9a\u3057\u3066\u3082\u3001true<\/strong><\/span>\u306b\u5909\u63db\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
boolean\u3068\u5404\u7a2e\u578b\u306e\u6bd4\u8f03\u30fb\u578b\u5224\u5b9a<\/h2>\n
boolean\u306eif\u5224\u5b9a<\/h3>\n
boolean<\/strong><\/span>\u3092\u4f7f\u3063\u3066if\u6587\u3067\u5206\u5c90<\/strong><\/span>\u3055\u305b\u3001\u51e6\u7406\u3092\u5207\u308a\u5206\u3051\u308b\u57fa\u672c\u306e\u4f7f\u3044\u65b9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
\u6b21\u7bc0\u3067\u3001boolean\u306e\u76f4\u5024\u3067\u306f\u306a\u304f\u3001boolean\u578b\u306e\u5909\u6570\u3092\u4f7f\u3063\u305f\u4f8b\u3082\u898b\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
window.onload = function () {\r\n    if (true) {\r\n        console.log('1st if( true ) is true.')\r\n    } else {\r\n        console.log('1st if( true ) is false.')\r\n    }\r\n\r\n    if (false) {\r\n        console.log('2nd if( false ) is true.')\r\n    } else {\r\n        console.log('2nd if( false ) is false.')\r\n    }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
1st if( true ) is true.\r\n2nd if( false ) is false.<\/pre>\n
if\u6587\u306e\u30ab\u30c3\u30b3\u300c()\u300d\u5185\u304ctrue\u306e\u5834\u5408\u306ftrue\u3068\u5224\u5b9a<\/strong><\/span>\u3055\u308c\u3001false\u306e\u5834\u5408\u306ffalse\u3068\u5224\u5b9a<\/strong><\/span>\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
boolean\u5909\u6570\u306e\u53cd\u8ee2<\/h3>\n
\u4eca\u5ea6\u306fboolean\u578b<\/strong><\/span>\u306e\u5909\u6570\u3092\u4f7f\u3063\u3066if\u6587<\/strong><\/span>\u3067\u5224\u5b9a\u3057\u3066\u307f\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u3001\u4eca\u56de\u306f\u5426\u5b9a\u8ad6\u7406\u6f14\u7b97\u5b50\u300c!\u300d<\/strong><\/span>\u3092\u4f7f\u3044\u3001bool\u5024\u3092\u53cd\u8ee2<\/strong><\/span>\u3055\u305b\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u300c!!\u300d<\/strong><\/span>\u3068\u3059\u308b\u3068\u3001bool\u5024\u306e\u53cd\u8ee2\u306e\u53cd\u8ee2<\/strong><\/span>\u3092\u884c\u3046\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
window.onload = function () {\r\n    var boolvalue = true;\r\n\r\n    if (boolvalue) {\r\n        console.log('1st if( boolvalue ) is true.')\r\n    } else {\r\n        console.log('1st if( boolvaluye ) is false.')\r\n    }\r\n\r\n    if (!boolvalue) {\r\n        console.log('2nd if( ! boolvalue ) is true.')\r\n    } else {\r\n        console.log('2nd if( ! boolvalue ) is false.')\r\n    }\r\n\r\n    if (!!boolvalue) {\r\n        console.log('3rd if( !! boolvalue ) is true.')\r\n    } else {\r\n        console.log('3rd if( !! boolvalue ) is false.')\r\n    }\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
1st if( boolvalue ) is true.\r\n2nd if( ! boolvalue ) is false.\r\n3rd if( !! boolvalue ) is true.<\/pre>\n
\u6700\u521d\u306b\u5909\u6570boolvalue<\/strong><\/span>\u306btrue<\/strong><\/span>\u3092\u4ee3\u5165\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u6700\u521d\u306eif\u6587\u3067\u306ftrue\u3068\u5224\u5b9a<\/strong><\/span>\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u6b21\u306eif\u6587\u3067\u306fboolvalue\u306b\u5426\u5b9a\u6f14\u7b97\u5b50\u300c!\u300d<\/strong><\/span>\u3092\u4f7f\u7528\u3057\u307e\u3057\u305f\u306e\u3067\u3001false\u3068\u5224\u5b9a<\/strong><\/span>\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u6700\u5f8c\u306eif\u6587\u3067\u306fboolvalue\u306b\u5426\u5b9a\u6f14\u7b97\u5b50\u30922\u56de\u300c!!\u300d<\/strong><\/span>\u4f7f\u7528\u3057\u307e\u3057\u305f\u306e\u3067\u3001true -> false -> true \u3068\u306a\u308a\u3001true\u3068\u5224\u5b9a<\/strong><\/span>\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u771f\u507d\u5024\u5224\u5b9a\u30fb\u6bd4\u8f03\u30fb\u53cd\u8ee2<\/h3>\n
\u6b21\u306b\u3001boolean\u578b<\/strong><\/span>\u3068\u6587\u5b57\u5217<\/strong><\/span>\u3092\u6bd4\u8f03\u3057\u305f\u3068\u304d\u306b\u3001\u305d\u306e\u771f\u507d\u5024\u304c\u3069\u306e\u3088\u3046\u306b\u5224\u5b9a\u3055\u308c\u308b\u304b<\/strong><\/span>\u307f\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n
boolean\u578b\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u306f\u9055\u3044\u3001false\u3068\u306a\u308b\u306e\u306f\u7a7a\u6587\u5b57""<\/strong><\/span>\u4ee5\u5916\u306b"0"<\/strong><\/span>\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u3001true\u3068\u306a\u308b\u306e\u306f\u3001"1"<\/strong><\/span>\u306e\u307f\u3067\u3059\u3002<\/p>\n
window.onload = function () {\r\n    \/\/ \u771f\u507d\u5024\u5224\u5b9a\u30fb\u6bd4\u8f03\u30fb\u53cd\u8ee2\r\n    console.log('"true" == true = ' + ("true" == true));\r\n    console.log('"false" == false = ' + ("false" == false));\r\n    console.log('"" == true = ' + ("" == true));\r\n    console.log('"" == false = ' + ("" == false));\r\n    console.log('"0" == true = ' + ("0" == true));\r\n    console.log('"0" == false = ' + ("0" == false));\r\n    console.log('"1" == true = ' + ("1" == true));\r\n    console.log('"1" == false = ' + ("1" == false));\r\n    console.log('"A" == true = ' + ("A" == true));\r\n    console.log('"A" == false = ' + ("A" == false));\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
"true" == true = false\r\n"false" == false = false\r\n"" == true = false\r\n"" == false = true\r\n"0" == true = false\r\n"0" == false = true\r\n"1" == true = true\r\n"1" == false = false\r\n"A" == true = false\r\n"A" == false = false<\/pre>\n
\u6b21\u306b\u3001\u6587\u5b57\u5217\u3092\u5426\u5b9a\u6f14\u7b97\u5b50 !<\/strong><\/span> \u3067\u53cd\u8ee2<\/strong><\/span>\u3055\u305b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u53cd\u8ee2\u7d50\u679c\u304ctrue<\/strong><\/span>\uff08\u53cd\u8ee2\u5143\u306ffalse\uff09\u3068\u306a\u308b\u306e\u306f\u3001\u7a7a\u6587\u5b57""\u306e\u307f<\/strong><\/span>\u3067\u3059\u3002<\/p>\n
\u4ed6\u306f\u53cd\u8ee2\u7d50\u679c\u304c\u3059\u3079\u3066false<\/strong><\/span>\uff08\u53cd\u8ee2\u5143\u306ftrue\uff09\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n
\u53cd\u8ee2\u6f14\u7b97\u5b50\u306fBoolean\u578b\u306e\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u3068\u5bfe\u5fdc<\/strong><\/span>\u304c\u53d6\u308c\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u306d\u3002<\/p>\n
window.onload = function () {\r\n    \/\/ \u53cd\u8ee2\r\n    console.log('! "true" = ' + (!"true"));\r\n    console.log('! "false" = ' + (!"false"));\r\n    console.log('! "" = ' + (!""));\r\n    console.log('! "0" = ' + (!"0"));\r\n    console.log('! "1" = ' + (!"1"));\r\n    console.log('! "A" = ' + (!"A"));\r\n}<\/pre>\n
\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
\r\n! "true" = false\r\n! "false" = false\r\n! "" = true\r\n! "0" = false\r\n! "1" = false\r\n! "A" = false<\/pre>\n
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null\u3068undefined<\/strong><\/span>\u306e\uff12\u3064\u306ftrue\u3067\u3082false\u3067\u3082\u306a\u3044\u5024<\/strong><\/span>\u3068\u5224\u5b9a\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
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\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
1 == true = true\r\n1 == false = false\r\n0 == true = false\r\n0 == false = true\r\n1.0 == true = true\r\n1.0 == false = false\r\n0.0 == true = false\r\n0.0 == false = true\r\nnull == true = false\r\nnull == false = false\r\nundefined == true = false\r\nundefined == false = false<\/pre>\n
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\u5b9f\u884c\u7d50\u679c\u3092\u898b\u308b\u3068\u30011\u30681.0<\/strong><\/span>\u306ffalse<\/strong><\/span>\u306b\u53cd\u8ee2\uff08\u53cd\u8ee2\u5143\u306ftrue\uff09\u30010\u30680.0<\/strong><\/span>\u306ftrue<\/strong><\/span>\u306b\u53cd\u8ee2\uff08\u53cd\u8ee2\u5143\u306ffalse\uff09\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n
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\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
! 1 = false\r\n! 0 = true\r\n! 1.0 = false\r\n! 0.0 = true\r\n! null = true\r\n! undefined = true<\/pre>\n
Boolean\u578b\u306e\u578b\u306e\u5224\u5b9a(typeof)<\/h2>\n
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\u5b9f\u884c\u7d50\u679c\uff1a<\/p>\n
typeof(true) = boolean\r\ntypeof(false) = boolean\r\ntypeof(Boolean("true") = boolean\r\ntypeof(Boolean("false") = boolean\r\ntypeof(Boolean("") = boolean\r\ntypeof(Boolean(" ") = boolean\r\ntypeof(Boolean(1)) = boolean\r\ntypeof(Boolean(0)) = boolean\r\ntypeof(Boolean(null)) = boolean<\/pre>\n
\u307e\u3068\u3081<\/h2>\n
\u4eca\u56de\u306f\u3001\u300cboolean\u578b<\/strong><\/span>\u300d\u306b\u3064\u3044\u3066\u5b66\u7fd2\u3057\u307e\u3057\u305f\uff01<\/p>\n
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[…]<\/p>\n","protected":false},"author":4,"featured_media":61280,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"swell_btn_cv_data":"","footnotes":""},"categories":[2346],"tags":[600,95],"class_list":["post-23300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-javascript-study","tag-boolean","tag-javascript"],"acf":[],"yoast_head":"\n\u3010JavaScript\u5165\u9580\u3011boolean\u578b\u306e\u4f7f\u3044\u65b9(\u6587\u5b57\u5217\u5909\u63db\/\u5224\u5b9a\/\u53cd\u8ee2) | \u4f8d\u30a8\u30f3\u30b8\u30cb\u30a2\u30d6\u30ed\u30b0<\/title>\n<meta name=\"description\" content=\"\u3053\u306e\u8a18\u4e8b\u3067\u306f\u300c \u3010JavaScript\u5165\u9580\u3011boolean\u578b\u306e\u4f7f\u3044\u65b9(\u6587\u5b57\u5217\u5909\u63db\/\u5224\u5b9a\/\u53cd\u8ee2) 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