JavaScript Reflect.deleteProperty() Method

The Reflect.deleteProperty() method allows to delete a property on an object. If the method returns true, that means deleting the property is successful. Otherwise, it returns false.

Syntax:

Parameters:

target: It is the target object on which to delete the property.

propertyKey: It is the name of the property to be deleted.

Return value:

A Boolean represents that the property was successfully deleted or not.

Exceptions:

A TypeError, if the target is not an Object.

Browser Support:

Chrome	49
Edge	12
Firefox	42
Opera	36

Example 1

var array1 = [1, 2, 3, 4, 5];
Reflect.deleteProperty(array1, '3');
document.writeln (array1);

Output:

1,2,3,,5

Example 2

const obj = {a: 1};
Object.freeze (obj );
document.writeln ( Reflect.deleteProperty ( obj , "a" ) ); 

Output:

false

Example 3

const obj = {a: 1, b:6, c:5};
document.writeln ( Reflect.deleteProperty ( obj , "a" ) );
document.writeln ( Reflect.deleteProperty ( obj , "b" ) );
document.writeln ( Reflect.deleteProperty ( obj , "c" ) );

Output: