JavaScript Handler deleteProperty() Method

JavaScript handler.deleteProperty() method in JavaScript is a trap for the delete operator. This method returns the boolean value if the delete was successful.

Syntax: 

const p = new Proxy(target, {
 deleteProperty: function(target, property) {
 }
});

Parameters: This method accepts two parameters as mentioned above and described below: 

• Target: This parameter holds the target object.
• Property: This parameter holds the name of the property which is to be deleted.

Return value: This method returns a Boolean value that indicates whether the property was successfully deleted.

Below examples illustrate the handler.deleteProperty() method in JavaScript:

Example 1: In this example, we will trap a delete operator using the handler.deleteProperty() method in JavaScript.
 

Output: 

"Green"
"Color is property which is removed"
undefined
true
false

Example 2: In this example, we will trap a delete operator using the handler.deleteProperty() method in JavaScript.

Output: 

true
"prop1 property is removed."
true
false
"prop1 property is not removed."
false

Supported Browsers: The browsers supported by the handler.deleteProperty() method are listed below: 

• Google Chrome 49 and above
• Edge 12 and above
• Firefox 18 and above
• Opera 36 and above
• Safari  10 and above

We have a complete list of Javascript Proxy/handler methods, to check those go through the Javascript Proxy/handler Reference article.