#[repr(transparent)]
pub struct Symbol { /* fields omitted */ }
The Symbol.hasInstance well-known symbol is used to determine
if a constructor object recognizes an object as its instance.
The instanceof operator's behavior can be customized by this symbol.
MDN documentation
The Symbol.isConcatSpreadable well-known symbol is used to configure
if an object should be flattened to its array elements when using the
Array.prototype.concat() method.
MDN documentation
The Symbol.iterator well-known symbol specifies the default iterator
for an object. Used by for...of.
MDN documentation
The Symbol.match well-known symbol specifies the matching of a regular
expression against a string. This function is called by the
String.prototype.match() method.
MDN documentation
The Symbol.replace well-known symbol specifies the method that
replaces matched substrings of a string. This function is called by the
String.prototype.replace() method.
For more information, see RegExp.prototype[@@replace]() and
String.prototype.replace().
MDN documentation
The Symbol.search well-known symbol specifies the method that returns
the index within a string that matches the regular expression. This
function is called by the String.prototype.search() method.
For more information, see RegExp.prototype[@@search]() and
String.prototype.search().
MDN documentation
The well-known symbol Symbol.species specifies a function-valued
property that the constructor function uses to create derived objects.
MDN documentation
The Symbol.split well-known symbol specifies the method that splits a
string at the indices that match a regular expression. This function is
called by the String.prototype.split() method.
For more information, see RegExp.prototype[@@split]() and
String.prototype.split().
MDN documentation
The Symbol.toPrimitive is a symbol that specifies a function valued
property that is called to convert an object to a corresponding
primitive value.
MDN documentation
The Symbol.toStringTag well-known symbol is a string valued property
that is used in the creation of the default string description of an
object. It is accessed internally by the Object.prototype.toString()
method.
MDN documentation
The Symbol.for(key) method searches for existing symbols in a runtime-wide symbol registry with
the given key and returns it if found.
Otherwise a new symbol gets created in the global symbol registry with this key.
MDN documentation
The Symbol.keyFor(sym) method retrieves a shared symbol key from the global symbol registry for the given symbol.
MDN documentation
The toString() method returns a string representing the specified Symbol object.
MDN documentation
The Symbol.unscopables well-known symbol is used to specify an object
value of whose own and inherited property names are excluded from the
with environment bindings of the associated object.
MDN documentation
The valueOf() method returns the primitive value of a Symbol object.
MDN documentation
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.
Tests whether this JS value is a JS 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.
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.
Tests whether this JS value is null
Tests whether this JS value is undefined
Tests whether the type of this JS value is symbol
Tests whether typeof self == "object" && self !== null.
Tests whether the type of this JS value is function.
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
The resulting type after dereferencing.
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
The wasm ABI type that this converts from when coming back out from the ABI boundary. 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
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
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
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 is an instance of the 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
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
🔬 This is a nightly-only experimental API. (try_from)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from)
Immutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (try_from)
The type returned in the event of a conversion error.
🔬 This is a nightly-only experimental API. (try_from)
Mutably borrows from an owned value. Read more
🔬 This is a nightly-only experimental API. (get_type_id)
this method will likely be replaced by an associated static
Same as IntoWasmAbi::into_abi, except that it may throw and never return in the case of Err. Read more