Struct js_sys::Reflect

#[repr(transparent)]
pub struct Reflect { /* fields omitted */ }

Methods

impl Reflect

pub fn apply(
    target: &Function,
    this_argument: &JsValue,
    arguments_list: &Array
) -> Result<JsValue, JsValue>

The static Reflect.apply() method calls a target function with arguments as specified.

MDN documentation

impl Reflect

pub fn construct(
    target: &Function,
    arguments_list: &Array
) -> Result<JsValue, JsValue>

The static Reflect.construct() method acts like the new operator, but as a function. It is equivalent to calling new target(...args). It gives also the added option to specify a different prototype.

MDN documentation

impl Reflect

pub fn construct_with_new_target(
    target: &Function,
    arguments_list: &Array,
    new_target: &Function
) -> Result<JsValue, JsValue>

The static Reflect.construct() method acts like the new operator, but as a function. It is equivalent to calling new target(...args). It gives also the added option to specify a different prototype.

MDN documentation

impl Reflect

pub fn define_property(
    target: &Object,
    property_key: &JsValue,
    attributes: &Object
) -> Result<bool, JsValue>

The static Reflect.defineProperty() method is like Object.defineProperty() but returns a Boolean.

MDN documentation

impl Reflect

pub fn delete_property(target: &Object, key: &JsValue) -> Result<bool, JsValue>

The static Reflect.deleteProperty() method allows to delete properties. It is like the delete operator as a function.

MDN documentation

impl Reflect

pub fn get(target: &JsValue, key: &JsValue) -> Result<JsValue, JsValue>

The static Reflect.get() method works like getting a property from an object (target[propertyKey]) as a function.

MDN documentation

impl Reflect

pub fn get_f64(target: &JsValue, key: f64) -> Result<JsValue, JsValue>

The same as Reflect::get except the key is an f64, which is slightly faster.

impl Reflect

pub fn get_u32(target: &JsValue, key: u32) -> Result<JsValue, JsValue>

The same as Reflect::get except the key is a u32, which is slightly faster.

impl Reflect

pub fn get_own_property_descriptor(
    target: &Object,
    property_key: &JsValue
) -> Result<JsValue, JsValue>

The static Reflect.getOwnPropertyDescriptor() method is similar to Object.getOwnPropertyDescriptor(). It returns a property descriptor of the given property if it exists on the object, undefined otherwise.

MDN documentation

impl Reflect

pub fn get_prototype_of(target: &JsValue) -> Result<Object, JsValue>

The static Reflect.getPrototypeOf() method is almost the same method as Object.getPrototypeOf(). It returns the prototype (i.e. the value of the internal [[Prototype]] property) of the specified object.

MDN documentation

impl Reflect

pub fn has(target: &JsValue, property_key: &JsValue) -> Result<bool, JsValue>

The static Reflect.has() method works like the in operator as a function.

MDN documentation

impl Reflect

pub fn is_extensible(target: &Object) -> Result<bool, JsValue>

The static Reflect.isExtensible() method determines if an object is extensible (whether it can have new properties added to it). It is similar to Object.isExtensible(), but with some differences.

MDN documentation

impl Reflect

pub fn own_keys(target: &JsValue) -> Result<Array, JsValue>

The static Reflect.ownKeys() method returns an array of the target object's own property keys.

MDN documentation

impl Reflect

pub fn prevent_extensions(target: &Object) -> Result<bool, JsValue>

The static Reflect.preventExtensions() method prevents new properties from ever being added to an object (i.e. prevents future extensions to the object). It is similar to Object.preventExtensions(), but with some differences.

MDN documentation

impl Reflect

pub fn set(
    target: &JsValue,
    property_key: &JsValue,
    value: &JsValue
) -> Result<bool, JsValue>

The static Reflect.set() method works like setting a property on an object.

MDN documentation

impl Reflect

pub fn set_f64(
    target: &JsValue,
    property_key: f64,
    value: &JsValue
) -> Result<bool, JsValue>

The same as Reflect::set except the key is an f64, which is slightly faster.

impl Reflect

pub fn set_u32(
    target: &JsValue,
    property_key: u32,
    value: &JsValue
) -> Result<bool, JsValue>

The same as Reflect::set except the key is a u32, which is slightly faster.

impl Reflect

pub fn set_with_receiver(
    target: &JsValue,
    property_key: &JsValue,
    value: &JsValue,
    receiver: &JsValue
) -> Result<bool, JsValue>

The static Reflect.set() method works like setting a property on an object.

MDN documentation

impl Reflect

pub fn set_prototype_of(
    target: &Object,
    prototype: &JsValue
) -> Result<bool, JsValue>

The static Reflect.setPrototypeOf() method is the same method as Object.setPrototypeOf(). It sets the prototype (i.e., the internal [[Prototype]] property) of a specified object to another object or to null.

MDN documentation

Methods from Deref<Target = Object>

pub fn constructor(&self) -> Function

The constructor property returns a reference to the Object constructor function that created the instance object.

MDN documentation

pub fn has_own_property(&self, property: &JsValue) -> bool

The hasOwnProperty() method returns a boolean indicating whether the object has the specified property as its own property (as opposed to inheriting it).

MDN documentation

pub fn is_prototype_of(&self, value: &JsValue) -> bool

The isPrototypeOf() method checks if an object exists in another object's prototype chain.

MDN documentation

pub fn property_is_enumerable(&self, property: &JsValue) -> bool

The propertyIsEnumerable() method returns a Boolean indicating whether the specified property is enumerable.

MDN documentation

pub fn to_locale_string(&self) -> JsString

The toLocaleString() method returns a string representing the object. This method is meant to be overridden by derived objects for locale-specific purposes.

MDN documentation

pub fn to_string(&self) -> JsString

The toString() method returns a string representing the object.

MDN documentation

pub fn value_of(&self) -> Object

The valueOf() method returns the primitive value of the specified object.

MDN documentation

Trait Implementations

impl AsRef<JsValue> for Reflect

fn as_ref(&self) -> &JsValue

Performs the conversion.

impl AsRef<Object> for Reflect

fn as_ref(&self) -> &Object

Performs the conversion.

impl Clone for Reflect

fn clone(&self) -> Reflect

Returns a copy of the value.

default fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl From<JsValue> for Reflect

fn from(obj: JsValue) -> Reflect

Performs the conversion.

impl From<Reflect> for JsValue

fn from(obj: Reflect) -> JsValue

Performs the conversion.

impl From<Reflect> for Object

fn from(obj: Reflect) -> Object

Performs the conversion.

impl Debug for Reflect

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Deref for Reflect

type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object

Dereferences the value.

impl RefFromWasmAbi for Reflect

type Abi = <JsValue as RefFromWasmAbi>::Abi

The wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<Reflect>

The type that holds the reference to Self for the duration of the invocation of the function that has an &Self parameter. This is required to ensure that the lifetimes don't persist beyond one function call, and so that they remain anonymous.

unsafe fn ref_from_abi(js: Self::Abi, extra: &mut dyn Stack) -> Self::Anchor

Recover a Self::Anchor from Self::Abi.

impl IntoWasmAbi for Reflect

type Abi = <JsValue as IntoWasmAbi>::Abi

The wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self, extra: &mut dyn Stack) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl<'a> IntoWasmAbi for &'a Reflect

type Abi = <&'a JsValue as IntoWasmAbi>::Abi

The wasm ABI type that this converts into when crossing the ABI boundary.

fn into_abi(self, extra: &mut dyn Stack) -> Self::Abi

Convert self into Self::Abi so that it can be sent across the wasm ABI boundary.

impl WasmDescribe for Reflect

fn describe()

impl FromWasmAbi for Reflect

type Abi = <JsValue as FromWasmAbi>::Abi

The wasm ABI type that this converts from when coming back out from the ABI boundary.

unsafe fn from_abi(js: Self::Abi, extra: &mut dyn Stack) -> Self

Recover a Self from Self::Abi.

impl OptionIntoWasmAbi for Reflect

fn none() -> Self::Abi

Returns an ABI instance indicating "none", which JS will interpret as the None branch of this option.

impl<'a> OptionIntoWasmAbi for &'a Reflect

fn none() -> Self::Abi

Returns an ABI instance indicating "none", which JS will interpret as the None branch of this option.

impl OptionFromWasmAbi for Reflect

fn is_none(abi: &Self::Abi) -> bool

Tests whether the argument is a "none" instance. If so it will be deserialized as None, and otherwise it will be passed to FromWasmAbi.

impl JsCast for Reflect

fn instanceof(val: &JsValue) -> bool

Performs a dynamic instanceof check to see whether the JsValue provided is an instance of this type.

fn unchecked_from_js(val: JsValue) -> Self

Performs a zero-cost unchecked conversion from a JsValue into an instance of Self

fn unchecked_from_js_ref(val: &JsValue) -> &Self

Performs a zero-cost unchecked conversion from a &JsValue into an instance of &Self.

default fn is_instance_of<T>(&self) -> bool where
    T: JsCast, 

Test whether this JS value is an instance of the type T.

default fn dyn_into<T>(self) -> Result<T, Self> where
    T: JsCast, 

Performs a dynamic cast (checked at runtime) of this value into the target type T.

default fn dyn_ref<T>(&self) -> Option<&T> where
    T: JsCast, 

Performs a dynamic cast (checked at runtime) of this value into the target type T.

default fn unchecked_into<T>(self) -> T where
    T: JsCast, 

Performs a zero-cost unchecked cast into the specified type.

default fn unchecked_ref<T>(&self) -> &T where
    T: JsCast, 

Performs a zero-cost unchecked cast into a reference to the specified type.