reflect-util

A module that provides additional methods not found on %Reflect%.

API

apply( target, thisArg, args )

Same as %Reflect.apply%.

call( target, thisArg, ...args )

Same as %Reflect.apply%, except it uses rest parameters.

bindApply( target [ , thisArg [ , ...args ] ] )

Equivalent to %Function.prototype.apply%.bind.

bindCall( target [ , thisArg [ , ...args ] ] )

Equivalent to %Function.prototype.call%.bind.

construct( target, args [ , newTarget ] )

Same as %Reflect.construct%.

defineProperties ( target, propertyAttributeMap )

Same as %Object.defineProperties%, except it doesn't throw when setting a property fails.

Parameters:

Param	Type	Description
target	object	Object on which to add or modify the properties. This can be a native JavaScript object or a DOM object.
propertyAttributeMap	Partial<PropertyDescriptorMap> & ThisType<any>	JavaScript object that contains one or more descriptor objects. Each descriptor object describes a data property or an accessor property.

Returns:

Whether setting all properties was successful.

Throws:

Error type	Description
TypeError	If either argument isn't an object.

defineProperty ( target, propertyKey, attributes )

Same as %Reflect.defineProperty%.

deleteProperty ( target, propertyKey, attributes )

Same as %Reflect.deleteProperty%.

get ( target, propertyKey [ , receiver ] )

Same as %Reflect.get%.

getInheritedPropertyDescriptor ( target, propertyKey )

Gets the possibly inherited property descriptor of the specified object.

Parameters:

Param	Type	Description
target	object	Object that contains the property on itself or in its prototype chain.
propertyKey	PropertyKey	The property name.

Returns:

The value, or undefined, if it isn't an own property of target.

Throws:

Error type	Description
TypeError	If target isn't an object.

getOwnPropertyDescriptor ( target, propertyKey )

Same as %Reflect.getOwnPropertyDescriptor%.

getOwnPropertyDescriptors ( target )

Same as %Object.getOwnPropertyDescriptors%, except it throws a TypeError if target isn't an object.

getOwnPropertyKeys ( target )

Same as %Reflect.ownKeys%.

getOwnPropertyNames ( target )

Same as %Object.getOwnPropertyNames%, except it throws a TypeError if target isn't an object.

getOwnPropertySymbols ( target )

Same as %Object.getOwnPropertySymbols%, except it throws a TypeError if target isn't an object.

getOwnPropertyValue ( target, propertyKey [ , receiver ] )

Same as %Reflect.get%, but only checks target's own properties.

getPrototypeOf ( target )

Same as %Reflect.getPrototypeOf%.

has ( target, propertyKey )

Same as %Reflect.has%.

hasOwnProperty ( target, propertyKey )

Same as %Object.prototype.hasOwnProperty%.call, except it throws if target isn't an object.

isConstructor ( target )

Checks whether target is a constructor.

Parameters:

Param	Type	Description
target	any	Any value to check.

Returns:

Whether target can be called with the new operator or Reflect.construct.

See:

• The Reflect.isCallable() / Reflect.isConstructor() TC39 proposal
• tc39/ecma262#1798 (comment)

isExtensible ( target )

Same as %Reflect.isExtensible%.

isObject ( target )

Same as is-true-object.

isPrototypeOf ( proto, target )

Same as %Object.prototype.isPrototypeOf%.call, except it throws if proto isn't an object.

isSameValue ( value1, value2 )

Same as %Object.is%.

preventExtensions ( target )

Same as %Reflect.preventExtensions%.

set ( target, propertyKey, value [ , receiver ] )

Same as %Reflect.set%.

setPrototypeOf ( target, proto )

Same as %Reflect.setPrototypeOf%.