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JavaScript ES5 Object Methods

  • Last Updated : 07 Jan, 2021

The ES5 Object method in javascript is used to find more methods to interact with the objects.
The ES5 Object method can do:

  • prevents enumeration
  • manipulation
  • deletion
  • prevent addition of new features
  • getters and setters

Syntax:

Object.defineProperty(object, property, {value : value})

The following Meta Data value can be true or false:

  • writable
  • enumerable
  • configurable

Example to get all properties:




<!DOCTYPE html>
<html>
  
<body>
    <div style="background-color: green;">
        <center>
            <h2>Geeksforgeeks</h2>
            <h3>The properties of the object are:</h3>
  
            <h3 id="demo"></h3>
        </center>
    </div>
  
    <script>
        var person = {
            name: "xyz",
            address: "noida",
            language: "hindi"
        }
        // Change Property
        Object.defineProperty(person, 
            "language", { enumerable: false });
  
        document.getElementById("demo").innerHTML
            = Object.getOwnPropertyNames(person);
    </script>
</body>
  
</html>



Example to get enumerable properties:




<!DOCTYPE html>
<html>
  
<body>
    <div style="background-color: green;">
        <center>
            <h2>Geeksforgeeks</h2>
            <h3>The properties of the object are:</h3>
  
            <h3 id="demo"></h3>
        </center>
    </div>
  
    <script type="text/javascript">
        var person = {
            name: "xyz",
            address: "noida",
            language: "hindi"
        }
  
        // Change Property
        Object.defineProperty(person, 
            "language", { enumerable: false });
  
        document.getElementById("demo")
            .innerHTML = Object.keys(person);
    </script>
</body>
  
</html>

Example to add a property:




<!DOCTYPE html>
<html>
  
<body>
    <div style="background-color: green;">
        <center>
            <h2>Geeksforgeeks</h2>
            <h3>
                The mobno property is added and 
                the value of that property is:
            </h3>
  
            <h3 id="demo"></h3>
        </center>
    </div>
  
    <script>
        var person = {
            name: "xyz",
            address: "noida",
            language: "hindi"
        }
  
        Object.defineProperty(person, 
            "mobno", { value: "979889xxxx" });
  
        // Display Properties
        document.getElementById("demo")
            .innerHTML = person.mobno;
    </script>
</body>
  
</html>




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