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<!DOCTYPE html>
<html lang="ko">

<head>
	<meta charset="UTF-8">
	<title>JavaScript Array</title>
</head>

<body>

	<h1>constructor 프로퍼티</h1>

	<script>
		function isArray(a) {
			return a.constructor.toString().indexOf("Array") > -1;
		}

		var arr = [1, true, "JavaScript"];			// 배열 생성

		document.write(arr.constructor + "<br>");	// constructor 프로퍼티의 값 출력
		document.write(arr.constructor.toString() + "<br>");	// function Array() {[native code]}
		document.write(arr.constructor.toString().indexOf("Array") + "<br>");	// 10
		document.write(isArray(arr))				// true
	</script>
	
</body>

</html>

​x
 
<!DOCTYPE html>
<html lang="ko">
​
<head>
    <meta charset="UTF-8">
    <title>JavaScript Array</title>
</head>
​
<body>
​
    <h1>constructor 프로퍼티</h1>
​
    <script>
        function isArray(a) {
            return a.constructor.toString().indexOf("Array") > -1;
        }
​
        var arr = [1, true, "JavaScript"];          // 배열 생성
​
        document.write(arr.constructor + "<br>");   // constructor 프로퍼티의 값 출력
        document.write(arr.constructor.toString() + "<br>");    // function Array() {[native code]}
        document.write(arr.constructor.toString().indexOf("Array") + "<br>");   // 10
        document.write(isArray(arr))                // true
    </script>
    
</body>
​
</html>