Live Code Editor Version 2.0

The constructor Property RUN

<!DOCTYPE html>
<html>
    <head>
        <meta charset="utf-8">
    </head>
    <body>
        <h1>Học lập trình miễn phí tại freetuts.net</h1>
        <p id="result"></p>
  
        <button onclick="myFunction()">Run</button>
        
        <script>
            function myFunction() {
                var content = '"Freetut" - ' + "Freetut".constructor + "<br>";
                content += "3.14 - " + 3.14.constructor + "<br>";
                content += "NaN - " + NaN.constructor + "<br>";
                content += "false - " + false.constructor + "<br>";
                content += "[1,2,3,4] - " + [1,2,3,4].constructor + "<br>";
                content += "{name:'John', age:34} - " 
                + {name:'John', age:34}.constructor + "<br>";
                content += "Date() - " + (new Date()).constructor + "<br>";
                content += "function () {} - " + (function () {}).constructor + "<br>";
                document.getElementById("result").innerHTML = content;
            }
        </script>
    </body>
</html>