Reflect
Value members
Concrete methods
Calls the function with the specified object as the this value and the elements of specified array as the arguments.
Calls the function with the specified object as the this value and the elements of specified array as the arguments.
- Value Params
- argumentsList
An array of argument values to be passed to the function.
- target
The function to call.
- thisArgument
The object to be used as the this object.
Constructs the target with the elements of specified array as the arguments
and the specified constructor as the new.target value.
Constructs the target with the elements of specified array as the arguments
and the specified constructor as the new.target value.
- Value Params
- argumentsList
An array of argument values to be passed to the constructor.
- newTarget
The constructor to be used as the
new.targetobject.- target
The constructor to invoke.
Adds a property to an object, or modifies attributes of an existing property.
Adds a property to an object, or modifies attributes of an existing property.
- Value Params
- attributes
Descriptor for the property. It can be for a data property or an accessor property.
- propertyKey
The property name.
- target
Object on which to add or modify the property. This can be a native JavaScript object (that is, a user-defined object or a built in object) or a DOM object.
Removes a property from an object, equivalent to delete target[propertyKey],
except it won't throw if target[propertyKey] is non-configurable.
Removes a property from an object, equivalent to delete target[propertyKey],
except it won't throw if target[propertyKey] is non-configurable.
- Value Params
- propertyKey
The property name.
- target
Object from which to remove the own property.
Gets the property of target, equivalent to target[propertyKey] when receiver === target.
Gets the property of target, equivalent to target[propertyKey] when receiver === target.
- Value Params
- propertyKey
The property name.
- receiver
The reference to use as the
thisvalue in the getter function, iftarget[propertyKey]is an accessor property.- target
Object that contains the property on itself or in its prototype chain.
Gets the own property descriptor of the specified object. An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
Gets the own property descriptor of the specified object. An own property descriptor is one that is defined directly on the object and is not inherited from the object's prototype.
- Value Params
- propertyKey
The property name.
- target
Object that contains the property.
Returns the prototype of an object.
Returns the prototype of an object.
- Value Params
- target
The object that references the prototype.
Equivalent to propertyKey in target.
Equivalent to propertyKey in target.
- Value Params
- propertyKey
Name of the property.
- target
Object that contains the property on itself or in its prototype chain.
Returns a value that indicates whether new properties can be added to an object.
Returns a value that indicates whether new properties can be added to an object.
- Value Params
- target
Object to test.
Returns the string and symbol keys of the own properties of an object. The own properties of an object are those that are defined directly on that object, and are not inherited from the object's prototype.
Returns the string and symbol keys of the own properties of an object. The own properties of an object are those that are defined directly on that object, and are not inherited from the object's prototype.
- Value Params
- target
Object that contains the own properties.
Prevents the addition of new properties to an object.
Prevents the addition of new properties to an object.
- Value Params
- target
Object to make non-extensible.
- Returns
Whether the object has been made non-extensible.
Sets the property of target, equivalent to target[propertyKey] = value when receiver === target.
Sets the property of target, equivalent to target[propertyKey] = value when receiver === target.
- Value Params
- propertyKey
Name of the property.
- receiver
The reference to use as the
thisvalue in the setter function, iftarget[propertyKey]is an accessor property.- target
Object that contains the property on itself or in its prototype chain.