Struct js_sys::WeakMap[][src]

#[repr(transparent)]
pub struct WeakMap { /* fields omitted */ }
Expand description

Implementations

The WeakMap object is a collection of key/value pairs in which the keys are weakly referenced. The keys must be objects and the values can be arbitrary values.

MDN documentation

The set() method sets the value for the key in the WeakMap object. Returns the WeakMap object.

MDN documentation

The get() method returns a specified by key element from a WeakMap object.

MDN documentation

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

MDN documentation

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

MDN documentation

Methods from Deref<Target = Object>

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

MDN documentation

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

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

MDN documentation

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

MDN documentation

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

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

MDN documentation

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

MDN documentation

Trait Implementations

Performs the conversion.

Performs the conversion.

Performs the conversion.

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Returns the “default value” for a type. Read more

The resulting type after dereferencing.

Dereferences the value.

Performs the conversion.

Performs the conversion.

Performs the conversion.

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

Recover a Self from Self::Abi. Read more

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

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

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

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

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

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

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

Test whether this JS value has a type T. Read more

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

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

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

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

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

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

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

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

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

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

This method tests for !=.

The wasm ABI type references to Self are recovered from.

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. Read more

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

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Performs the conversion.

Performs the conversion.

Same as IntoWasmAbi::Abi

Same as IntoWasmAbi::into_abi, except that it may throw and never return in the case of Err. Read more

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.