Struct js_sys::Map

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

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Implementations

impl Map[−]

pub fn clear(&self)[−]

The clear() method removes all elements from a Map object.

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impl Map[−]

pub fn delete(&self, key: &JsValue) -> bool[−]

The delete() method removes the specified element from a Map object.

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impl Map[−]

pub fn for_each(&self, callback: &mut dyn FnMut(JsValue, JsValue))[−]

The forEach() method executes a provided function once per each key/value pair in the Map object, in insertion order.

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impl Map[−]

pub fn get(&self, key: &JsValue) -> JsValue[−]

The get() method returns a specified element from a Map object.

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impl Map[−]

pub fn has(&self, key: &JsValue) -> bool[−]

The has() method returns a boolean indicating whether an element with the specified key exists or not.

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impl Map[−]

pub fn new() -> Map[−]

The Map object holds key-value pairs. Any value (both objects and primitive values) maybe used as either a key or a value.

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impl Map[−]

pub fn set(&self, key: &JsValue, value: &JsValue) -> Map[−]

The set() method adds or updates an element with a specified key and value to a Map object.

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impl Map[−]

pub fn size(&self) -> u32[−]

The value of size is an integer representing how many entries the Map object has. A set accessor function for size is undefined; you can not change this property.

MDN documentation

impl Map[−]

pub fn entries(&self) -> Iterator[−]

The entries() method returns a new Iterator object that contains the [key, value] pairs for each element in the Map object in insertion order.

MDN documentation

impl Map[−]

pub fn keys(&self) -> Iterator[−]

The keys() method returns a new Iterator object that contains the keys for each element in the Map object in insertion order.

MDN documentation

impl Map[−]

pub fn values(&self) -> Iterator[−]

The values() method returns a new Iterator object that contains the values for each element in the Map object in insertion order.

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).

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

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

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

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

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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 Map[+]

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fn as_ref(&self) -> &JsValue[−]

Performs the conversion.

impl AsRef<Map> for Map[+]

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fn as_ref(&self) -> &Map[−]

Performs the conversion.

impl AsRef<Object> for Map[+]

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fn as_ref(&self) -> &Object[−]

Performs the conversion.

impl Clone for Map[+]

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fn clone(&self) -> Map[−]

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)[−]

Performs copy-assignment from source.

impl Debug for Map[+]

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

Formats the value using the given formatter.

impl Deref for Map[+]

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type Target = Object

The resulting type after dereferencing.

fn deref(&self) -> &Object[−]

Dereferences the value.

impl Eq for Map

impl From<JsValue> for Map[+]

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fn from(obj: JsValue) -> Map[−]

Performs the conversion.

impl From<Map> for JsValue[+]

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fn from(obj: Map) -> JsValue[−]

Performs the conversion.

impl From<Map> for Object[+]

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fn from(obj: Map) -> Object[−]

Performs the conversion.

impl FromWasmAbi for Map[+]

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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) -> Self[−]

Recover a Self from Self::Abi.

impl IntoWasmAbi for Map[+]

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type Abi = <JsValue as IntoWasmAbi>::Abi

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

fn into_abi(self) -> Self::Abi[−]

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

impl<'a> IntoWasmAbi for &'a Map[+]

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

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

fn into_abi(self) -> Self::Abi[−]

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

impl JsCast for Map[+]

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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.

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 OptionFromWasmAbi for Map[+]

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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 OptionIntoWasmAbi for Map[+]

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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 Map[+]

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fn none() -> Self::Abi[−]

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

impl PartialEq<Map> for Map[+]

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fn eq(&self, other: &Map) -> bool[−]

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Map) -> bool[−]

This method tests for !=.

impl RefFromWasmAbi for Map[+]

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type Abi = <JsValue as RefFromWasmAbi>::Abi

The wasm ABI type references to Self are recovered from.

type Anchor = ManuallyDrop<Map>

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) -> Self::Anchor[−]

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

impl StructuralEq for Map

impl StructuralPartialEq for Map

impl WasmDescribe for Map[+]

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fn describe()