Live Code Editor Version 2.0

The instanceof Operator 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 language = ["php", "js", "css", "html"];
                var content = 'language is a string Object - ' 
                + (language instanceof String) + '<br>';

content = content + 'language is a Array Object - ' 
                + (language instanceof Array) + '<br>';

content = content + 'language is a Number Object - ' 
                + (language instanceof Number) + '<br>';

content = content + 'language is a Object Object - ' 
                + (language instanceof Object) + '<br>';

content = content + 'language is a Date Object - ' 
                + (language instanceof Date) + '<br>';

document.getElementById("result").innerHTML = content;
            }
        </script>
    </body>
</html>