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var phoneNum = "010333-5555";
phoneNum = $.trim(phoneNum); // 앞뒤 공백제거
phoneNum = phoneNum.replace(/-/gi, ""); // - 하이픈 제거
phoneNum = phoneNum.replace(/^(\d{2,3})(\d{3,4})(\d{4})$/, "$1-$2-$3");
console.log(phoneNum); // 010-333-5555
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