setTimeout, setIntervalã‚’ä¹—ã£å–ã£ã¦çˆ†é€Ÿã«ã™ã‚‹ - ç´ äººãŒãƒ—ãƒã‚°ãƒ©ãƒŸãƒ³ã‚°ã‚’勉強ã—ã¦ã„ãŸãƒ–ãƒã‚°setTimeout() vs ãƒãƒƒã‚«ãƒ¼ã€ä»ç¾©ãªã戦ã„ã«ã‚ˆã‚‹ã¨ function isNativeFunction(func, name) { for (var o in func) { if (o === "toString") return false; } var match = func.toString().match(/^function (\S+)\(\)\s*{\s*\[native code\]\s*}$/); return (match && match[1] === name); } setInterval = function(){}; isNativeFunction(setInterval, 'setInterval'); // false ã§setIntervalãŒå½è£…ã•ã‚Œã¦ã„ã‚‹ã‹èª¿ã¹ã‚‰ã‚Œã‚‹ã¨æ›¸ã„ã¦ã‚ã‚‹ãŒã€ãã‚“ãªã“ã¨ã¯ãªã„。 自分ãŒæ™®æ®µä½¿ã£ã¦ã„るブラウザã¯Sa
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