JavaScript Reflect

JavaScript Reflect is a built-in object that gives access to other elements for interceptable operations. This object can be used to check whether an object has a particular property or to change or add new properties to an existing object. This object cannot be explicitly created using the new keyword and we cannot call it a function. Reflect has a set of static functions to perform operations.

Syntax:

Reflect.staticFunc()

Parameters: This object does not have fix parameters, it depends upon the static function being used with it

Return Type: The return values depend on the function being used.

Example 1: This example uses Reflect method to check and add properties in a particular object.

Output:

true
{name: 'Raj', course: 'DSA', website: 'geeksforgeeks.org', Rating: '5'}

Example 2: This example uses Reflect functions to construct a new object.

Output:

true
Details {name: 'Shobhit', course: 'DSA'}

Example 3: This example uses Reflect methods to freeze an array so that new elements cannot be added to it.

Output: Using the preventExtensions method new properties cannot be added to the array. This helps to freeze the array

(4) ['Hello', 'Welcome', 'to', 'GeeksforGeeks']
true
(4) ['Hello', 'Welcome', 'to', 'GeeksforGeeks']

Supported Browsers:

• Chrome
• Edge
• Firefox
• Opera
• Safari

We have a complete list of JavaScript Reflect methods, to check please go through the JavaScript Reflect Reference article.