freeze/seal/preventExtensions ã®é•ã„ã¾ã¨ã‚ - ã†ãªã®æ—¥è¨˜ECMAScript 5 ã§è¿½åŠ ã•ã‚ŒãŸã€Object.freezeã‚„Object.sealを実行ã™ã‚‹ã¨ä½•ãŒã§ããªããªã‚‹ã®ã‹ã«ã¤ã„ã¦ã€‚ ã“ã†ãªã‚‹ã€‚ preventExtensions seal freeze プãƒãƒ‘ティã®è¿½åŠ × × × プãƒãƒ‘ティã®å‰Šé™¤ â—‹ × × プãƒãƒ‘ティã®å€¤å¤‰æ›´ â—‹ â—‹ × プãƒãƒ‘ティã®å±žæ€§å¤‰æ›´ â—‹ × × 確èªã€‚ (function() { //"use strict"; // strict モードã«ã™ã‚‹ã¨ã€Firefox,Google Chrome,Safariã§ã¯flozenObjectã¸ã®å±žæ€§ã®è¿½åŠ ç‰ã§ã‚‚TypeErrorãŒç™ºç”Ÿã™ã‚‹ã‚ˆã†ã«ãªã‚‹ã€‚ // IEã§ã¯ã€éžstrict モードã¨å¤‰ã‚らãªã„動作をã™ã‚‹ã€‚ describe('Flozen Object', function() { var flozenObject; beforeEach(function(
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