{"id":1257,"date":"2014-11-25T00:37:27","date_gmt":"2014-11-24T15:37:27","guid":{"rendered":"http:\/\/tech.akat.info\/?p=1257"},"modified":"2014-12-23T16:14:45","modified_gmt":"2014-12-23T07:14:45","slug":"javascript","status":"publish","type":"post","link":"https:\/\/tech.akat.info\/?p=1257","title":{"rendered":"JavaScript"},"content":{"rendered":"

\u6982\u8981<\/h1>\n

\u30c9\u30c3\u30c8\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3067JavaScript\u306b\u3064\u3044\u3066\u3084\u3063\u3066\u307f\u305f
\nhttp:\/\/dotinstall.com\/lessons\/basic_javascript_v2<\/p>\n

\u7279\u5fb4<\/h1>\n

\u30d6\u30e9\u30a6\u30a6\u30b6\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u308b\u30b9\u30af\u30ea\u30d7\u30c8\u8a00\u8a9e<\/p>\n

\u304b\u3044\u3066\u307f\u308b<\/h1>\n

hello world<\/h2>\n
\r\nroot@www27032ue:\/var\/www\/htdocs\/study# cat index.html\r\n<!DOCTYPE html>\r\n<html lang="ja">\r\n<head>\r\n        <meta charset="utf-8">\r\n        <title>JavaScript\u306e\u7df4\u7fd2<\/title>\r\n<\/head>\r\n<body>\r\n        <script>\r\n                \/\/ \u30b3\u30e1\u30f3\u30c8\r\n                console.log("hello world!");\r\n        <\/script>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n
[F12]\u3067\u7ba1\u7406\u8005\u30c4\u30fc\u30eb\u3092\u8d77\u52d5\u3057\u3001\u51fa\u529b\u3092\u78ba\u8a8d\u3067\u304d\u308b
\n\"2014-11-24_233326\"<\/a><\/p>\n
\u5909\u6570<\/h2>\n
\r\nroot@www27032ue:\/var\/www\/htdocs\/study# cat index.html\r\n### \u4ee5\u4e0b\u30d8\u30c3\u30c0\u306f\u7701\u7565\u3059\u308b ###\r\n<body>\r\n        <script>\r\n        \/*\r\n                \u5909\u6570\r\n                - \u6587\u5b57\u5217\r\n                - \u6570\u5024\r\n                - \u771f\u507d\u5024\r\n                - \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\r\n                \u3000- \u914d\u5217\u30fb\u95a2\u6570\u30fb\u7d44\u307f\u8fbc\u307f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\r\n                - undefined \u5b9a\u7fa9\u3055\u308c\u3066\u3044\u306a\u3044\r\n                - null \u4f55\u3082\u306a\u3044\r\n        *\/\r\n\r\n                \/\/ var msg  = "hello world!" \u3068\u3044\u3046\u66f8\u304d\u65b9\u3082\u53ef\u80fd\r\n                \/\/ "(\u30c0\u30d6\u30eb\u30af\u30aa\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3)\u3067\u3082'(\u30b7\u30f3\u30b0\u30eb\u30af\u30aa\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3)\u3067\u3082\u9055\u3044\u306f\u306a\u3044\r\n                \/\/ \u6539\u884c\u306f\\n\u3092\u5229\u7528\u3059\u308b\r\n                var msg;\r\n                msg = "hello world!";\r\n                console.log(msg);\r\n        <\/script>\r\n<\/body>\r\n<\/pre>\n
\u6570\u5024\u8a08\u7b97<\/h2>\n
\r\nroot@www27032ue:\/var\/www\/htdocs\/study# cat index.html\r\n<body>\r\n        <script>\r\n                var x;\r\n                x = 10 * 2;\r\n                x = 10 % 3;\r\n                console.log(x);\r\n        <\/script>\r\n<\/body>\r\n<\/pre>\n
\u6761\u4ef6\u5206\u5c90<\/h2>\n
\r\nroot@www27032ue:\/var\/www\/htdocs\/study# cat index.html\r\n<body>\r\n        <script>\r\n                var score = 55;\r\n                if (score > 60){\r\n                        console.log("OK");\r\n                } else if (score > 40){\r\n                        console.log("soso...");\r\n                } else {\r\n                        console.log("NG");\r\n                }\r\n        <\/script>\r\n<\/body>\r\n<\/pre>\n
\u771f\u507d\u5024<\/h2>\n
\r\nif (x) {\r\n\r\n}\r\n\r\n### x\u304c\u6587\u5b57\u5217\u306e\u5834\u5408\u3001\u4e0a\u306f\u4ee5\u4e0b\u3068\u540c\u7fa9 ###\r\nif (x !== ''){\r\n\r\n}\r\n\r\n<\/pre>\n
while\u6587<\/h2>\n
\r\nvar i = 0;\r\nwhile ( i < 10){\r\n        console.log(i);\r\n        i++;\r\n}\r\n<\/pre>\n
\u30e6\u30fc\u30b6\u306b\u30e1\u30c3\u30bb\u30fc\u30b8\u3092\u8868\u793a\u3059\u308b<\/h2>\n
\r\n\/\/ alert\u306e\u8868\u793a\r\nalert("hello");\r\n\r\n\/\/ cancel\u30dc\u30bf\u30f3\u304c\u3064\u3044\u3066\u3044\u308b\r\nvar answer = confirm("are you sure?");\r\nconsole.log(answer);\r\n\r\n\/\/ \u5909\u6570\u3092\u683c\u7d0d\u3059\u308b\r\nvar name = prompt("what's your name?","\u540d\u7121\u3057")\r\nconsole.log(name);\r\n<\/pre>\n
\"2014-12-22_214246\"<\/a><\/p>\n
\u95a2\u6570<\/h2>\n
\r\n\/\/ \u5f15\u6570\u3092\u6301\u305f\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\r\nfunction hello(name) {\r\n        console.log("hello" + name);\r\n}\r\n\r\nhello("Tom");\r\n\r\n\/\/ \u8fd4\u308a\u5024\u3092\u3082\u305f\u305b\u308b\u3053\u3068\u3082\u3067\u304d\u308b\r\nfunction hello2(name){\r\n        return "hello" + name;\r\n}\r\nvar greet = hello2("John");\r\nconsole.log(greet);\r\n<\/pre>\n
\u95a2\u6570\u305d\u306e2<\/h2>\n
\r\n\/\/ \u95a2\u6570\u3082\u30c7\u30fc\u30bf\u578b\u3067\u3042\u308b\u305f\u3081\u5909\u6570\u306b\u5165\u308c\u308b\u3053\u3068\u304c\u53ef\u80fd\r\nvar varhello = function(name) {\r\n        var msg = "hello" + name;\r\n        return msg;\r\n};\r\nvar greet = varhello("John");\r\nconsole.log(greet);\r\n<\/pre>\n
\u95a2\u6570\u305d\u306e3<\/h2>\n
\r\n\/\/ \u5373\u6642\u95a2\u6570\u3002\u5b9a\u7fa9\u3057\u3066\u5373\u5b9f\u884c\u3059\u308b\r\n(function hello(name) { \/\/ hello\u3092\u7701\u7565\u3059\u308b\u3053\u3068\u3082\u53ef\r\n        console.log("hello "+name);\r\n})("Tom");\r\n<\/pre>\n
\u30bf\u30a4\u30de\u30fc\u51e6\u7406<\/h2>\n
\r\n\/\/ setInterval : \u4e00\u5b9a\u9593\u9694\u3067\u51e6\u7406\u3092\u5b9f\u884c\u3002\u524d\u306e\u51e6\u7406\u304c\u7d42\u308f\u3063\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u306f\u6c17\u306b\u3057\u306a\u3044\r\n\/\/ setTimeout : \u4e00\u5b9a\u6642\u9593\u7d4c\u3064\u3068\u3001\u4e00\u5ea6\u3060\u3051\u51e6\u7406\u3092\u5b9f\u884c\u3002\u3002\u524d\u306e\u51e6\u7406\u304c\u5b8c\u4e86\u3057\u3066\u3044\u308b\u3068\u5b9f\u884c\u3059\u308b\r\nvar i = 0;\r\nfunction show() {\r\n        console.log(i++);\r\n}\r\n\r\nsetInterval(function(){\r\n        show();\r\n},1000);\r\n<\/pre>\n
\r\n\/\/ 3\u3092\u8868\u793a\u3057\u305f\u3089\u7d42\u4e86\u3059\u308b\r\nvar i = 0;\r\nfunction show() {\r\n        console.log(i++);\r\n        var tid = setTimeout(function(){\r\n                show();\r\n        },1000);\r\n        if (i > 3){\r\n                clearTimeout(tid);\r\n        }\r\n}\r\nshow();\r\n<\/pre>\n
\u914d\u5217<\/h2>\n
\r\nvar score = [100, 300, 500];\r\nconsole.log(score[0]);\r\nconsole.log(score);\r\n<\/pre>\n
\"2014-12-22_225338\"<\/a><\/p>\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/h2>\n
\u540d\u524d\u3068\u5024\u304c\u30b0\u30eb\u30fc\u30d7\u5316\u3055\u308c\u3066\u3044\u308b<\/p>\n
\r\nvar user = {\r\n        email: "shimizu.r.hiroaki@gmail.com",\r\n        score: 80\r\n};\r\n\r\nconsole.log(user["email"]);\r\nconsole.log(user.score);\r\nconsole.log(user);\r\n<\/pre>\n
\"2014-12-22_225850\"<\/a><\/p>\n
\r\nvar user = {\r\n        email: "shimizu.r.hiroaki@gmail.com",\r\n        score: 80,\r\n        greet: function(name) { \/\/ \u95a2\u6570\u306e\u3053\u3068\u3092\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30e1\u30bd\u30c3\u30c9\u3002this\u3067\u81ea\u5206\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u6307\u3059\r\n                console.log("hello," + name + " from " + this.email);\r\n        }\r\n};\r\nuser.greet("Tom");\r\n<\/pre>\n
\"2014-12-22_230945\"<\/a><\/p>\n
\u7d44\u307f\u8fbc\u307f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/h2>\n
javascript\u304c\u7528\u610f\u3057\u3066\u3044\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/p>\n
\r\nvar s = new String("shimizu");\r\n\/\/ \u5b9f\u306f\u3001var s = "shimizu"; \u3067\u3082\u540c\u3058\u3053\u3068\u304c\u3067\u304d\u308b(\u6587\u5b57\u5217\u30ea\u30c6\u30e9\u30eb)\r\nconsole.log(s.length);\r\nconsole.log(s.replace("i","I"));\r\n<\/pre>\n
\r\nvar d = new Date(2014, 1, 11, 10 ,20 ,30);\r\nconsole.log(d.getFullYear());\r\nconsole.log(d.getMonth());\r\n<\/pre>\n
DOM<\/h2>\n
\u30d6\u30e9\u30a6\u30b6\u81ea\u8eab\u3082\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u3042\u308a\u3001\u64cd\u4f5c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/p>\n
\r\n\/\/ \u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u8868\u793a\r\nconsole.dir(window);\r\n<\/pre>\n
window.document – \u4eca\u958b\u3044\u3066\u3044\u308b\u30da\u30fc\u30b8\u306e\u3053\u3068
\nJavascript\u3067\u66f8\u304d\u63db\u3048\u308b\u3053\u3068\u3067\u52d5\u7684\u306b\u30da\u30fc\u30b8\u3092\u5909\u66f4\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b
\ndocument \u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306e\u547d\u4ee4\u3092document object model (DOM)\u3068\u547c\u3076
\n\u4ee5\u4e0b\u306b\u3064\u3044\u3066\u3001\u6587\u5b57\u5217\u3068\u8272\u3092\u5909\u66f4\u3057\u3066\u3044\u308b<\/p>\n
\r\n<!DOCTYPE html>\r\n<html lang="ja">\r\n<head>\r\n        <meta charset="utf-8">\r\n        <title>JavaScript\u306e\u7df4\u7fd2<\/title>\r\n<\/head>\r\n<body>\r\n        <h1>\u898b\u51fa\u3057<\/h1>\r\n        <p id="msg">\u3053\u3093\u306b\u3061\u306f<\/p>\r\n        <script>\r\n        var e = document.getElementById('msg');\r\n        e.textContent = 'hello!';\r\n        e.style.color = 'red';\r\n\r\n        <\/script>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n
\"2014-12-23_113738\"<\/a><\/p>\n
\u30a4\u30d9\u30f3\u30c8<\/h2>\n
\r\n<!DOCTYPE html>\r\n<html lang="ja">\r\n<head>\r\n        <meta charset="utf-8">\r\n        <title>JavaScript\u306e\u7df4\u7fd2<\/title>\r\n<\/head>\r\n<body>\r\n        <h1>\u898b\u51fa\u3057<\/h1>\r\n        <p id="msg">\u3053\u3093\u306b\u3061\u306f<\/p>\r\n        <button id="add">click<\/button>\r\n        <script>\r\n        document.getElementById('add').addEventListener('click',function(){\r\n        var e = document.getElementById('msg');\r\n        e.textContent = 'hello!';\r\n        e.style.color = 'red';\r\n        });\r\n        <\/script>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n
\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3068\u300c\u3053\u3093\u306b\u3061\u306f\u300d\u306e\u6587\u5b57\u3068\u8272\u304c\u5909\u5316\u3059\u308b
\n\"2014-12-23_114144\"<\/a><\/p>\n
\u304a\u307f\u304f\u3058\u3092\u4f5c\u308b<\/h2>\n
http:\/\/dotinstall.com\/lessons\/omikuji_js
\n\"2014-12-23_161114\"<\/a><\/p>\n
\r\n<!DOCTYPE html>\r\n<html lang="ja">\r\n<head>\r\n        <meta charset="utf-8">\r\n        <title>\u304a\u307f\u304f\u3058<\/title>\r\n<\/head>\r\n<body>\r\n        <h1>\u304a\u307f\u304f\u3058<\/h1>\r\n        <input type="button" value="\u3042\u306a\u305f\u306e\u904b\u52e2\u306f" onclick="getOmikuji();">\r\n        <p>\u3042\u306a\u305f\u306e\u904b\u52e2\u306f...<span id="result"><\/span><\/p>\r\n        <script>\r\n                function getOmikuji(){\r\n                        var omikuji = ["\u5927\u5409","\u4e2d\u5409","\u5c0f\u5409"];\r\n                        var result = Math.floor(Math.random() * omikuji.length);\r\n                        document.getElementById('result').innerHTML = omikuji[result];\r\n                }\r\n        <\/script>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n
\u30b9\u30ed\u30c3\u30c8\u30de\u30b7\u30fc\u30f3<\/h2>\n
\"2014-12-23_161226\"<\/a><\/p>\n
\r\n<!DOCTYPE html>\r\n<html lang="ja">\r\n<head>\r\n        <meta charset="utf-8">\r\n        <title>\u30b9\u30ed\u30c3\u30c8\u30de\u30b7\u30fc\u30f3<\/title>\r\n        <style>\r\n        .col{\r\n        float: left;\r\n        width: 100px;\r\n        text-align: center;\r\n        font-size: 32px;\r\n        }\r\n        <\/style>\r\n\r\n<\/head>\r\n\r\n<body>\r\n<div class="col">\r\n        <span id="num0">?<\/span><br>\r\n        <input type="button" value="STOP" id="stop0">\r\n<\/div>\r\n\r\n<div class="col">\r\n        <span id="num1">?<\/span><br>\r\n        <input type="button" value="STOP" id="stop1">\r\n<\/div>\r\n\r\n<div class="col">\r\n        <span id="num2">?<\/span><br>\r\n        <input type="button" value="STOP" id="stop2">\r\n<\/div>\r\n\r\n<script>\r\n\r\n(function() {\r\nvar timers,\r\nnums,\r\nstopCount;\r\n\r\ndocument.getElementById('stop0').onclick = function() {\r\n        stopSlot(0);\r\n};\r\ndocument.getElementById('stop1').onclick = function() {\r\n        stopSlot(1);\r\n};\r\ndocument.getElementById('stop2').onclick = function() {\r\n        stopSlot(2);\r\n};\r\n\r\n\r\nfunction startSlot(){\r\n        timers = [];\r\n        nums = [];\r\n        stopCount = 0;\r\n\r\n        runSlot(0);\r\n        runSlot(1);\r\n        runSlot(2);\r\n\r\n}\r\n\r\nfunction stopSlot(n) {\r\n        \/\/ javascript \u7279\u6709\u306e\u66f8\u304d\u65b9\r\n        if (typeof nums[n] !== 'undefined') {\r\n                return;\r\n        }\r\n\r\n        clearTimeout(timers[n]);\r\n        nums[n] = document.getElementById('num'+ n).innerHTML;\r\n        stopCount++;\r\n\r\n        if (stopCount == 3){\r\n                checkSlot();\r\n        }\r\n}\r\n\r\nfunction checkSlot() {\r\n        nums.sort();\r\n        if(nums[0] == nums[1] && nums[0] == nums[2]){\r\n                alert('\u3059\u3079\u3066\u63c3\u3063\u305f');\r\n        }else if (nums[0] == nums[1] || nums[1] == nums[2]){\r\n                alert('2\u3064\u63c3\u3063\u305f');\r\n        }else{\r\n                alert('\u6b8b\u5ff5');\r\n        }\r\n}\r\n\r\nfunction runSlot(n) {\r\n        document.getElementById('num'+ n).innerHTML = Math.floor(Math.random() * 10);\r\n        timers[n] = setTimeout(function() {\r\n        runSlot(n);},50);\r\n}\r\n\r\nstartSlot();\r\n})();\r\n\r\n<\/script>\r\n\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n
5\u79d2\u3067\u6c7a\u3081\u308d<\/h2>\n
http:\/\/dotinstall.com\/lessons\/just_five_js
\n\"2014-12-23_160930\"<\/a><\/p>\n
\r\n<!DOCTYPE html>\r\n<html lang="ja">\r\n<head>\r\n        <meta charset="utf-8">\r\n        <title>5\u79d2\u3067\u6c7a\u3081\u308d\uff01<\/title>\r\n<\/head>\r\n\r\n<body>\r\n\r\n<h1>5\u79d2\u3067\u6c7a\u3081\u308d\uff01<\/h1>\r\n<p><input type="button" value="start" onclick="start();"><\/p>\r\n<p><input type="button" value="stop" onclick="stop();"><\/p>\r\n<p id="result"><\/p>\r\n\r\n<script>\r\nvar start;\r\nvar stop;\r\nvar FIVE_SECOND = 5 * 1000;\r\nfunction start() {\r\n        start = new Date().getTime();\r\n        console.log(start);\r\n}\r\n\r\nfunction stop() {\r\n        stop = new Date().getTime();\r\n        console.log(stop);\r\n\r\n        \/\/ \u5dee\u3092\u7b97\u51fa\r\n        var diff = FIVE_SECOND - (stop - start);\r\n        \/\/ \u7d50\u679c\u3092\u8868\u793a\r\n        var e = document.getElementById('result');\r\n        if (diff == 0) {\r\n                e.innerHTML= '\u3074\u3063\u305f\u308a';\r\n        } else if (diff > 0){\r\n                e.innerHTML = (diff \/ 1000) + '\u79d2\u65e9\u3044';\r\n        } else {\r\n                e.innerHTML = (diff \/ 1000) + '\u79d2\u9045\u3044';\r\n        }\r\n}\r\n<\/script>\r\n<\/body>\r\n<\/html>\r\n<\/pre>\n
\u53c2\u8003URL<\/h1>\n
\u30c9\u30c3\u30c8\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb-javascript\u95a2\u9023
\nhttp:\/\/dotinstall.com\/lessons\/basic_javascript_v2
\nhttps:\/\/developer.mozilla.org\/ja\/docs\/Web\/JavaScript<\/p>\n","protected":false},"excerpt":{"rendered":"
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