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undefined์ฒดํฌ

 (1)
javascript ๊ณต๋ฐฑ ๋ฐ null ์ฒดํฌ ๋ฉ”๋ชจ javascript ๊ณต๋ฐฑ ๋ฐ null ์ฒดํฌ์ถ”๊ฐ€!! ์ž๋ฃŒํ˜•์— ์ƒ๊ด€์—†์ด ๊ฐ’์˜ ์กด์žฌ ์œ ๋ฌด ํ™•์ธ, true:์žˆ์Œ, false:์—†์Œ ([], {} ๋„ ๋นˆ๊ฐ’) ์•„๋ž˜๋Š” ์˜ˆ์ œ์ž…๋‹ˆ๋‹ค. //์ž๋ฃŒํ˜•์— ์ƒ๊ด€์—†์ด ๊ฐ’์˜ ์กด์žฌ ์œ ๋ฌด ํ™•์ธ, true:์žˆ์Œ, false:์—†์Œ ([], {} ๋„ ๋นˆ๊ฐ’) function isExist(val) { if (val == "" || val == null || val == undefined || val == "undefined" || (val != null && typeof val == "object" && !Object.keys(val).length)) { return false; } else { return true; } } var ckVal = $.cookie('CookieValue'); i..

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