Struct PropertyDescriptor 

pub struct PropertyDescriptor<T = JsValue> { /* private fields */ }

Implementations

impl<T> PropertyDescriptor<T>

pub fn get_writable(&self) -> Option<bool>

impl<T> PropertyDescriptor<T>

pub fn set_writable(&self, writable: bool)

impl<T> PropertyDescriptor<T>

pub fn get_enumerable(&self) -> Option<bool>

impl<T> PropertyDescriptor<T>

pub fn set_enumerable(&self, enumerable: bool)

impl<T> PropertyDescriptor<T>

pub fn get_configurable(&self) -> Option<bool>

impl<T> PropertyDescriptor<T>

pub fn set_configurable(&self, configurable: bool)

impl<T> PropertyDescriptor<T>

where T: JsGeneric,

pub fn get_get(&self) -> Option<Function<fn() -> T>>

where Option<Function<fn() -> T>>: ErasableGenericOwn<Option<Function<fn() -> JsValue>>>,

impl<T> PropertyDescriptor<T>

where T: JsGeneric,

pub fn set_get(&self, get: Function<fn() -> T>)

where Function<fn() -> T>: ErasableGenericOwn<Function<fn() -> JsValue>>,

impl<T> PropertyDescriptor<T>

where T: JsGeneric,

pub fn get_set(&self) -> Option<Function<fn(T) -> JsValue>>

where Option<Function<fn(T) -> JsValue>>: ErasableGenericOwn<Option<Function<fn(JsValue) -> JsValue>>>,

impl<T> PropertyDescriptor<T>

where T: JsGeneric,

pub fn set_set(&self, set: Function<fn(T) -> JsValue>)

where Function<fn(T) -> JsValue>: ErasableGenericOwn<Function<fn(JsValue) -> JsValue>>,

impl<T> PropertyDescriptor<T>

pub fn get_value(&self) -> Option<T>

where Option<T>: ErasableGenericOwn<Option<JsValue>>,

impl<T> PropertyDescriptor<T>

pub fn set_value(&self, value: &T)

where T: ErasableGenericBorrow<JsValue>,

impl PropertyDescriptor

pub fn new<T>() -> PropertyDescriptor<T>

pub fn new_value<T>(value: &T) -> PropertyDescriptor<T>

where T: JsGeneric,

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

👎Deprecated:

Use Object::hasOwn instead.

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 to_js_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

Methods from Deref<Target = JsValue>

pub const NULL: JsValue

pub const UNDEFINED: JsValue

pub const TRUE: JsValue

pub const FALSE: JsValue

pub fn into_serde<T>(&self) -> Result<T, Error>

where T: for<'a> Deserialize<'a>,

👎Deprecated:

causes dependency cycles, use serde-wasm-bindgen or gloo_utils::format::JsValueSerdeExt instead

Invokes JSON.stringify on this value and then parses the resulting JSON into an arbitrary Rust value.

This function is deprecated, due to creating a dependency cycle in some circumstances. Use serde-wasm-bindgen or gloo_utils::format::JsValueSerdeExt instead.

This function will first call JSON.stringify on the JsValue itself. The resulting string is then passed into Rust which then parses it as JSON into the resulting value.

Usage of this API requires activating the serde-serialize feature of the wasm-bindgen crate.

Errors

Returns any error encountered when parsing the JSON into a T.

pub fn as_f64(&self) -> Option<f64>

Returns the f64 value of this JS value if it’s an instance of a number.

If this JS value is not an instance of a number then this returns None.

pub fn is_string(&self) -> bool

Tests whether this JS value is a JS string.

pub fn as_string(&self) -> Option<String>

If this JS value is a string value, this function copies the JS string value into Wasm linear memory, encoded as UTF-8, and returns it as a Rust String.

To avoid the copying and re-encoding, consider the JsString::try_from() function from js-sys instead.

If this JS value is not an instance of a string or if it’s not valid utf-8 then this returns None.

UTF-16 vs UTF-8

JavaScript strings in general are encoded as UTF-16, but Rust strings are encoded as UTF-8. This can cause the Rust string to look a bit different than the JS string sometimes. For more details see the documentation about the str type which contains a few caveats about the encodings.

pub fn as_bool(&self) -> Option<bool>

Returns the bool value of this JS value if it’s an instance of a boolean.

If this JS value is not an instance of a boolean then this returns None.

pub fn is_null(&self) -> bool

Tests whether this JS value is null

pub fn is_undefined(&self) -> bool

Tests whether this JS value is undefined

pub fn is_null_or_undefined(&self) -> bool

Tests whether this JS value is null or undefined

pub fn is_symbol(&self) -> bool

Tests whether the type of this JS value is symbol

pub fn is_object(&self) -> bool

Tests whether typeof self == "object" && self !== null.

pub fn is_array(&self) -> bool

Tests whether this JS value is an instance of Array.

pub fn is_function(&self) -> bool

Tests whether the type of this JS value is function.

pub fn is_bigint(&self) -> bool

Tests whether the type of this JS value is bigint.

pub fn js_typeof(&self) -> JsValue

Applies the unary typeof JS operator on a JsValue.

MDN documentation

pub fn js_in(&self, obj: &JsValue) -> bool

Applies the binary in JS operator on the two JsValues.

MDN documentation

pub fn is_truthy(&self) -> bool

Tests whether the value is “truthy”.

pub fn is_falsy(&self) -> bool

Tests whether the value is “falsy”.

pub fn loose_eq(&self, other: &JsValue) -> bool

Compare two JsValues for equality, using the == operator in JS.

MDN documentation

pub fn bit_not(&self) -> JsValue

Applies the unary ~ JS operator on a JsValue.

MDN documentation

pub fn unsigned_shr(&self, rhs: &JsValue) -> u32

Applies the binary >>> JS operator on the two JsValues.

MDN documentation

pub fn checked_div(&self, rhs: &JsValue) -> JsValue

Applies the binary / JS operator on two JsValues, catching and returning any RangeError thrown.

MDN documentation

pub fn pow(&self, rhs: &JsValue) -> JsValue

Applies the binary ** JS operator on the two JsValues.

MDN documentation

pub fn lt(&self, other: &JsValue) -> bool

Applies the binary < JS operator on the two JsValues.

MDN documentation

pub fn le(&self, other: &JsValue) -> bool

Applies the binary <= JS operator on the two JsValues.

MDN documentation

pub fn ge(&self, other: &JsValue) -> bool

Applies the binary >= JS operator on the two JsValues.

MDN documentation

pub fn gt(&self, other: &JsValue) -> bool

Applies the binary > JS operator on the two JsValues.

MDN documentation

pub fn unchecked_into_f64(&self) -> f64

Applies the unary + JS operator on a JsValue. Can throw.

MDN documentation

Trait Implementations

impl<T> AsRef<JsValue> for PropertyDescriptor<T>

fn as_ref(&self) -> &JsValue

Converts this type into a shared reference of the (usually inferred) input type.

impl<T> AsRef<Object> for PropertyDescriptor<T>

fn as_ref(&self) -> &Object

Converts this type into a shared reference of the (usually inferred) input type.

impl<T> AsRef<PropertyDescriptor<T>> for PropertyDescriptor<T>

fn as_ref(&self) -> &PropertyDescriptor<T>

Converts this type into a shared reference of the (usually inferred) input type.

impl<T> Clone for PropertyDescriptor<T>

where T: Clone,

fn clone(&self) -> PropertyDescriptor<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T> Debug for PropertyDescriptor<T>

where T: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for PropertyDescriptor

fn default() -> PropertyDescriptor

Returns the “default value” for a type.

impl<T> Deref for PropertyDescriptor<T>

type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object

Dereferences the value.

impl<T> ErasableGeneric for PropertyDescriptor<T>

type Repr = JsValue

The singular concrete type that all generic variants can be transmuted on

impl From<JsValue> for PropertyDescriptor

fn from(obj: JsValue) -> PropertyDescriptor

Converts to this type from the input type.

impl<T> From<PropertyDescriptor<T>> for JsValue

fn from(obj: PropertyDescriptor<T>) -> JsValue

Converts to this type from the input type.

impl<T> From<PropertyDescriptor<T>> for Object

fn from(obj: PropertyDescriptor<T>) -> Object

Converts to this type from the input type.

impl<T> FromWasmAbi for PropertyDescriptor<T>

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: <PropertyDescriptor<T> as FromWasmAbi>::Abi, ) -> PropertyDescriptor<T>

Recover a Self from Self::Abi.

impl<T> IntoJsGeneric for PropertyDescriptor<T>

where PropertyDescriptor<T>: JsGeneric,

type JsCanon = PropertyDescriptor<T>

The canonical JsGeneric form of this type.

fn to_js(self) -> PropertyDescriptor<T>

Produce the canonical JsGeneric value for self.

impl<T> IntoWasmAbi for PropertyDescriptor<T>

type Abi = <JsValue as IntoWasmAbi>::Abi

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

fn into_abi(self) -> <PropertyDescriptor<T> as IntoWasmAbi>::Abi

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

impl<'a, T> IntoWasmAbi for &'a PropertyDescriptor<T>

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

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

fn into_abi(self) -> <&'a PropertyDescriptor<T> as IntoWasmAbi>::Abi

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

impl<T> JsCast for PropertyDescriptor<T>

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) -> PropertyDescriptor<T>

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

fn unchecked_from_js_ref(val: &JsValue) -> &PropertyDescriptor<T>

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

fn has_type<T>(&self) -> bool

where T: JsCast,

Test whether this JS value has a type T.

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.

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.

fn unchecked_into<T>(self) -> T

where T: JsCast,

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

fn unchecked_ref<T>(&self) -> &T

where T: JsCast,

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

fn is_instance_of<T>(&self) -> bool

where T: JsCast,

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

fn is_type_of(val: &JsValue) -> bool

Performs a dynamic check to see whether the JsValue provided is a value of this type.

impl<T> LongRefFromWasmAbi for PropertyDescriptor<T>

type Abi = <JsValue as LongRefFromWasmAbi>::Abi

Same as RefFromWasmAbi::Abi

type Anchor = PropertyDescriptor<T>

Same as RefFromWasmAbi::Anchor

unsafe fn long_ref_from_abi( js: <PropertyDescriptor<T> as LongRefFromWasmAbi>::Abi, ) -> <PropertyDescriptor<T> as LongRefFromWasmAbi>::Anchor

Same as RefFromWasmAbi::ref_from_abi

impl<T> OptionFromWasmAbi for PropertyDescriptor<T>

fn is_none(abi: &<PropertyDescriptor<T> as FromWasmAbi>::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<T> OptionIntoWasmAbi for PropertyDescriptor<T>

fn none() -> <PropertyDescriptor<T> as IntoWasmAbi>::Abi

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

impl<'a, T> OptionIntoWasmAbi for &'a PropertyDescriptor<T>

fn none() -> <&'a PropertyDescriptor<T> as IntoWasmAbi>::Abi

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

impl<T> Promising for PropertyDescriptor<T>

type Resolution = PropertyDescriptor<T>

The type that this value resolves to.

impl<T> RefFromWasmAbi for PropertyDescriptor<T>

type Abi = <JsValue as RefFromWasmAbi>::Abi

The Wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<PropertyDescriptor<T>>

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: <PropertyDescriptor<T> as RefFromWasmAbi>::Abi, ) -> <PropertyDescriptor<T> as RefFromWasmAbi>::Anchor

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

impl<T> UpcastFrom<PropertyDescriptor<T>> for JsValue

impl<T, __UpcastTarget0> UpcastFrom<PropertyDescriptor<T>> for PropertyDescriptor<__UpcastTarget0>

where __UpcastTarget0: UpcastFrom<T>,

impl<T, __UpcastTarget0> UpcastFrom<PropertyDescriptor<T>> for JsOption<PropertyDescriptor<__UpcastTarget0>>

where __UpcastTarget0: UpcastFrom<T>,

impl<T> UpcastFrom<PropertyDescriptor<T>> for Object

impl<T> UpcastFrom<PropertyDescriptor<T>> for JsOption<Object>