Live Code Editor Version 2.0

The delete 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>
            var car = {
                name: "Lamborghini galardo",
                color: "black",
                cost: 300000,
                country: "Italy" 
            }
            var content = 'name - ' + car.name + '<br>';
            content = content +  'color - ' + car.color + '<br>';
            content = content +  'cost - ' + car.cost + ' $ <br>';
            content = content +  'country - ' + car.country + '<br>';
            document.getElementById("result").innerHTML = content;
            function myFunction() {
                delete car.country;
                var content = 'name - ' + car.name + '<br>';
                content = content +  'color - ' + car.color + '<br>';
                content = content +  'cost - ' + car.cost + ' $ <br>';
                content = content +  'country - ' + car.country + '<br>';
                document.getElementById("result").innerHTML = content;
            };
        </script>
    </body>
</html>