{"id":1931,"date":"2021-08-20T07:13:09","date_gmt":"2021-08-19T22:13:09","guid":{"rendered":"https:\/\/suzutukiblog.com\/?p=1931"},"modified":"2023-01-06T01:31:14","modified_gmt":"2023-01-05T16:31:14","slug":"javascript0","status":"publish","type":"post","link":"https:\/\/suzutukiblog.com\/index.php\/2021\/08\/20\/javascript0\/","title":{"rendered":"JavaScript\u5b66\u7fd2\u306e\u307e\u3068\u30810(\u5909\u6570\uff64\u95a2\u6570\uff64\u30e1\u30bd\u30c3\u30c9\u3068\u30d7\u30ed\u30d1\u30c6\u30a3\u30fc)"},"content":{"rendered":"

1:JavaScript\u306e\u57fa\u790e\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u307f\u305f<\/h3>\n

HTML\u306e\u8a18\u8ff0<\/h3>\n
\n
<body>\r\n  <h1>JavaScript\u57fa\u790e<\/h1>\r\n  <script src=\"main.js\"><\/script>\r\n<\/body><\/code><\/pre>\n<\/div>\n
main.js\u306e\u8a18\u8ff0<\/h3>\n
\n
\/\/ var, let, const\r\n\/\/ var\u306f\u4e0a\u66f8\u304d\u3067\u304d\u308b\r\n\/\/ var name = 'Tom';\r\n\/\/ console.log('hello' + name);\r\n\r\n\/\/ let\u3082\u4e0a\u66f8\u304d\u3067\u304d\u308b\u3088\r\nlet name = 'Pon';\r\nname = 'Tim'\r\nconsole.log('hello' + name);\r\n\/\/ \u3042\u3068\u304b\u3089\u4e0a\u66f8\u304d\u3067\u304d\u306a\u3044\u306e\u3067\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3088\r\n\/\/ const nam = 'Yan';\r\n\/\/ nam = 'Tim';\r\n\r\n\/\/ \u30c7\u30fc\u30bf\u578b\u306f Number, String, Boolean, Undefined, Null, Symbol\r\n\/\/ \u52d5\u7684\u578b\u4ed8\u3051\u8a00\u8a9e\r\n\/\/ Ruby\u3068\u4f3c\u3066\u3044\u308b\u70b9\u304c\u3042\u308b\u306a\r\nlet variable = 'str';\r\n  variable = 12;\r\n  variable = false;\r\n\/\/ variable = undefined;\r\n\/\/ variable = null;\r\n\r\n\/\/ \u5b9f\u969b\u306b\u78ba\u8a8d\u3059\u308b\u306b\u306f\uff1f\r\n  console.log(typeof variable);\r\n\/\/ \u30dd\u30a4\u30f3\u30c8\u4e0a\u66f8\u304d\u7981\u6b62\u306fconst\u3067\u5b9a\u7fa9\u3057\u3088\u3046\uff01<\/code><\/pre>\n<\/div>\n
\u691c\u8a3c\u3057\u3066\u5b9f\u884c\u7d50\u679c\u3092\u78ba\u304b\u3081\u308b\u3068\u30fb\u30fb\u30fb<\/h3>\n
\n
helloTom main.js:4:9\r\nhelloPon main.js:9:9\r\nboolean main.js:21:9\r\nUncaught TypeError: invalid assignment to const 'nam'<\/code><\/pre>\n<\/div>\n
\u2191\u304c\u306a\u305c\u51fa\u529b\u3055\u308c\u305f\u304b\uff1f<\/h3>\n
let\u3067name\u306e\u4e2d\u8eab\u3092’pon’\u304b\u3089\u2019Tim’\u306b\u4e0a\u66f8\u304d\u3057\u305f\u306e\u3067helloTim\u3068\u51fa\u529b\u3055\u308c\u305f<\/p>\n
let\u3067variable\u306e\u4e2d\u8eab\u304c\u6700\u5f8c\u306bfalse\u306b\u306a\u3063\u305f\u306e\u3067\u30c7\u30fc\u30bf\u578b\u306eboolean\u304ctypeof\u3067\u51fa\u529b\u3055\u308c\u305f<\/p>\n
\u307e\u3068\u3081<\/h3>\n
var\u3068let\u306f\u4e0a\u66f8\u304d\u3067\u304d\u308b\u304cconst\u306f\u3067\u304d\u306a\u3044<\/p>\n
\u5b9f\u969b\u306b\u78ba\u8a8d\u3059\u308b\u306b\u306fconsole.log\u306a\u3069\u3092\u99c6\u4f7f\u3057\u3088\u3046
\nconsole.log(typeof variable);\u306a\u3069\u306e\u3088\u3046\u306b<\/p>\n
2:\u95a2\u6570\u306b\u3064\u3044\u3066<\/h3>\n
HTML\u306e\u8a18\u8ff0\u306f1\u3068\u540c\u3058\u306a\u306e\u3067\u7701\u7565<\/p>\n
main.js\u306e\u8a18\u8ff0<\/h3>\n
\n
\/\/ ()\u5185\u3092\u5f15\u6570\u3068\u547c\u3076\r\nfunction hi(name, age) {\r\n\/\/\u3000 let name = 'Tarou';\r\n\u3000 console.log('hi' + name + age);\r\n\/\/  \u95a2\u6570\u304c\u5b9f\u884c\u3055\u308c\u305f\u7d50\u679c(\u623b\u308a\u5024)\u3092\u8868\u793a\r\n return name + age;\r\n }\r\n\r\n hi('Tarou ', 10);\r\n const returnVal = hi('Tarou2 ', 20);\r\n console.log(returnVal);\r\n\r\n\/\/ \u3053\u3061\u3089\u306e\u3084\u308a\u65b9\u3067\u3082OK\r\nconst hello = function (name, age) {\r\n  console.log('hello' + name + age);\r\n    return name + age;\r\n}\r\n\r\n  hello('Tarou ', 10);\r\n  const returnKey = hello('Tarou ', 10);\r\n  console.log(returnKey);\r\n  const returnVal2 = hello('Tarou2 ', 20);\r\n  console.log(returnVal2);\r\n\r\n\/\/ \u95a2\u6570\u540d\u3092\u3082\u305f\u306a\u3044\u95a2\u6570\u3092\u7121\u540d\u95a2\u6570\u3068\u547c\u3073\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3067\u51fa\u308b\r\n\/\/ function(name, age) {\r\n\/\/ console.log('hello' + name + age);\r\n\/\/ return name + age;\r\n\/\/ }<\/code><\/pre>\n<\/div>\n
\r\n<\/strong><\/pre>\n
\u691c\u8a3c(\u30b3\u30f3\u30bd\u30fc\u30eb)\u3057\u3066\u5b9f\u884c\u7d50\u679c\u3092\u78ba\u304b\u3081\u308b\u3068\u30fb\u30fb\u30fb<\/h3>\n
\n
highTarou 10 main.js:5:11\r\nhighTarou2 20 main.js:5:11\r\nTarou2 20 main.js:11:10\r\nhelloTarou 10 main.js:15:13\r\nhello Tarou 10 main.js:15:13\r\nTarou 10 main.js:21:9\r\nhello Tarou2 20 main.js:15:13\r\nTarou2 20<\/code><\/pre>\n<\/div>\n
\u2191\u304c\u306a\u305c\u51fa\u529b\u3055\u308c\u305f\u304b\uff1f<\/h3>\n
    \n
  1. (‘hi’ + name + age)\u3067hiTarou 10\u304c\u51fa\u529b\u3055\u308c\u305f<\/strong><\/li>\n
  2.  console.log(returnVal);\u3067\u95a2\u6570hi\u304c\u547c\u3073\u51fa\u3055\u308c\u3066<\/strong><\/strong>\n
    \n
    console.log(‘high’ + name + age);\u306e\u90e8\u5206\u304c\u51fa\u529b\u3055\u308c\u305f<\/div>\n<\/div>\n<\/li>\n
  3. \n
    \n
    return name + age;\u306e\u90e8\u5206\u304c\u51fa\u529b\u3055\u308c\u305f<\/div>\n<\/div>\n<\/li>\n
  4. \n
    \n
    console.log(‘hello’ + name + age);\u306e\u90e8\u5206\u304c\u51fa\u529b\u3055\u308c\u305f<\/div>\n<\/div>\n<\/li>\n
  5. \u95a2\u6570hello\u304c\u547c\u3073\u51fa\u3055\u308c\u3066\n
    \n
    console.log(‘hello’ + name + age);\u306e\u90e8\u5206\u304c\u51fa\u529b\u3055\u308c\u305f<\/div>\n<\/div>\n<\/li>\n
  6. \n
    \n
    return name + age;\u306e\u90e8\u5206\u304c\u51fa\u529b\u3055\u308c\u305f<\/div>\n<\/div>\n<\/li>\n
  7. \u95a2\u6570hello\u304c\u547c\u3073\u51fa\u3055\u308c\u3066\n
    \n
    console.log(‘hello’ + name + age);\u306e\u90e8\u5206\u304c\u51fa\u529b\u3055\u308c\u305f(\u305f\u3060\u3057\u5f15\u6570\u304c\u9055\u3046)<\/div>\n<\/div>\n<\/li>\n
  8. \n
    \n
    return name + age;\u306e\u90e8\u5206\u304c\u51fa\u529b\u3055\u308c\u305f(\u305f\u3060\u3057\u5f15\u6570\u304c\u9055\u3046)<\/div>\n<\/div>\n<\/li>\n<\/ol>\n
    \u307e\u3068\u3081<\/h3>\n
    \u5909\u6570\u306e\u4e2d\u306b\u95a2\u6570\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u95a2\u6570\u540d\u3092\u6301\u305f\u306a\u3044\u7121\u540d\u95a2\u6570\u304c\u3042\u308b\u3002<\/p>\n
    \u5f15\u6570\u3068\u623b\u308a\u5024\u306b\u3064\u3044\u3066\u3060\u3044\u305f\u3044\u7406\u89e3\u3067\u304d\u305f<\/p>\n
    3:\u30e1\u30bd\u30c3\u30c9\u3068\u30d7\u30ed\u30d1\u30c6\u30a3\u30fc<\/h3>\n
    HTML\u306e\u8a18\u8ff0\u306f1\u3068\u540c\u3058\u306a\u306e\u3067\u7701\u7565<\/p>\n
    main.js\u306e\u8a18\u8ff0<\/h3>\n
    \n
    let hello = 'Hello World';\r\n\/\/ \u30d7\u30ed\u30d1\u30c6\u30a3\r\n\/\/ \u6587\u5b57\u5217\u306e\u9577\u3055(\u4f55\u6587\u5b57\u542b\u307e\u308c\u3066\u3044\u308b\u304b\uff1f)\u3092\u8868\u793a\r\n  console.log(hello.length);\r\n\/\/ \u30e1\u30bd\u30c3\u30c9\r\n\/\/ \u6587\u5b57\u3092\u5927\u6587\u5b57\u306b\u3059\u308b(HELLO WORLD)\r\n  console.log(hello.toUpperCase());\r\n\/\/ \u4e0e\u3048\u3089\u308c\u305f\u6570\u5b57\u306e\u5206\u3060\u3051\u6587\u5b57\u3092\u5207\u308a\u53d6\u308b\r\n  console.log(hello.substring(0, 5));\r\n\u3000\u3000 console.log(hello.slice(0, 5));\r\n\/\/ \u7a7a\u6587\u5b57\u306b\u3059\u308b\u3068\r\n  console.log(hello.split(''));\r\n\/\/ \u7a7a\u767d(\u534a\u89d2\u30b9\u30da\u30fc\u30b9)\u3092\u8db3\u3059\u3068\r\n  console.log(hello.split(' '));<\/code><\/pre>\n<\/div>\n
    \u691c\u8a3c\u3057\u3066\u5b9f\u884c\u7d50\u679c\u3092\u78ba\u304b\u3081\u308b\u3068\u30fb\u30fb\u30fb<\/h3>\n
    \n
    \n
    11 main.js:4:9\r\nHELLO WORLD main.js:7:9\r\nHello main.js:9:9\r\nHello main.js:10:9\r\nArray(11) [ \"H\", \"e\", \"l\", \"l\", \"o\", \" \", \"W\", \"o\", \"r\", \"l\", \u2026 ]\r\n\u25b6main.js:12:9\r\n\u25b6Array [ \"Hello\", \"World\" ]<\/code><\/pre>\n<\/div>\n
    <\/span><\/p>\n<\/div>\n
    \u2191\u304c\u306a\u305c\u51fa\u529b\u3055\u308c\u305f\u304b\uff1f<\/h3>\n
      \n
    1. .length\u3067\u6587\u5b57\u5217\u306e\u9577\u3055\u304c\u51fa\u529b\u3055\u308c\u305f\u3002<\/li>\n
    2. .toUpperCase\u3067\u6587\u5b57\u5217\u306e\u5927\u6587\u5b57\u3067\u51fa\u529b\u3055\u308c\u305f\u3002<\/li>\n
    3. .substring\u30675\u6587\u5b57\u5206\u307e\u3067\u51fa\u529b\u3055\u308c\u305f\u3002<\/li>\n
    4. .slice\u30675\u6587\u5b57\u5206\u307e\u3067\u51fa\u529b\u3055\u308c\u305f<\/li>\n
    5. split\u30671\u6587\u5b57\u305a\u3064””\u3067\u56f2\u308f\u308c\u305f<\/li>\n
    6. Hello\u3068World\u3067\u5206\u3051\u3066””\u3067\u56f2\u308f\u308c\u305f<\/li>\n<\/ol>\n
      \u307e\u3068\u3081<\/h3>\n
      console.log(hello.length);\u306e\u3088\u3046\u306b\u53d6\u5f97\u3067\u304d\u308b\u3082\u306e\u304c\u30d7\u30ed\u30d1\u30c6\u30a3<\/p>\n
      console.log(hello.toUpperCase());\u306e\u3088\u3046\u306b\u7279\u5b9a\u306e\u51e6\u7406\u3092\u3059\u308b\u306e\u306f\u30e1\u30bd\u30c3\u30c9<\/p>\n
      \u305d\u306e1\u306b\u7d9a\u304f<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
      1:JavaScript\u306e\u57fa\u790e\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u307f\u305f HTML\u306e\u8a18\u8ff0 <body> <h1>JavaScript\u57fa\u790e<\/h1> <script src=”main.js”>& […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[17,27],"tags":[],"class_list":["post-1931","post","type-post","status-publish","format-standard","hentry","category-javascript","category-programming-note"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t