JavaScript Reflect Reference
JavaScript Reflect is a built-in object. It gives access to other methods for interceptable operations. Like most objects in JavaScript, it is not a constructor.
Syntax:
Reflect.function()
Example: Below examples illustrate the Reflect.setPrototypeOf() method in JavaScript:
Javascript
<script> const object1 = {}; console.log(Reflect.setPrototypeOf(object1, Object.prototype)); console.log(Reflect.setPrototypeOf(object1, null)); const object2 = {}; console.log(Reflect.setPrototypeOf(Object.freeze(object2), null)); let object3 = { gfg() { return 'value'; } } let obj = { geeks() { return 'answer'; } } Object.setPrototypeOf(obj, object3); console.dir(obj); console.log(obj.geeks()); console.log(obj.gfg());</script> |
Output:
true true false "answer" "value"
Note: There are no Properties or Contructor in Reflect Object.
The complete list of JavaScript Reflect are listed below:
String Methods: JavaScript methods are actions that can be performed on objects. There are two types of String methods in JavaScript.
Static Method: If the method is called using the Reflect class itself then it is called a static method.
| Instance Methods | Description |
|---|---|
| apply() | Call a function using the specified argument. |
| construct() | It gives the added option to specify a different prototype. |
| defineProperty() | Allow the precise addition to or modification of a property on an object. |
| deleteProperty() | Returns a Boolean value which indicates whether the property was successfully deleted. |
| get() | This method always returns the value of the property. |
| getOwnPropertyDescriptor() | Get the descriptor of an object. |
| getPrototypeOf() | Return the prototype of the specified object. |
| has() | Check whether the property exists in an object or not. It works like an operator as a function. |
| isExtensible() | Check whether an object is extensible or not. |
| ownKeys() | Return an array of the target object’s own property keys and it ignores the inherited properties. |
| preventExtensions() | Prevent the future extensions to the object which means prevent from adding new properties to the object. |
| set() | Set the value of an object property. |
| setPrototypeOf() | Set the prototype of a specified object to another object or to Null. |
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