[Javascript] - 자바스크립트 앞뒤 공백 제거 ( trim )

var $thisTitle = "                앞뒤 짜르기 정규표현식                ";

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$thisTitle = $thisTitle.replace(/^\s*/, "");

$thisTitle = $thisTitle.replace(/\s*$/, "");

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$thisTitle = $thisTitle.replace(/(^\s*)|(\s*$)/, "");

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alert( $thisTitle );