#[repr(transparent)]
pub struct Function { /* fields omitted */ }
The Function
constructor creates a new Function
object. Calling the
constructor directly can create functions dynamically, but suffers from
security and similar (but far less significant) performance issues
similar to eval
. However, unlike eval
, the Function
constructor
allows executing code in the global scope, prompting better programming
habits and allowing for more efficient code minification.
MDN documentation
The apply() method calls a function with a given this value, and arguments provided as an array
(or an array-like object).
MDN documentation
The call()
method calls a function with a given this value and
arguments provided individually.
MDN documentation
The call()
method calls a function with a given this value and
arguments provided individually.
MDN documentation
The call()
method calls a function with a given this value and
arguments provided individually.
MDN documentation
The call()
method calls a function with a given this value and
arguments provided individually.
MDN documentation
The bind() method creates a new function that, when called, has its this keyword set to the provided value,
with a given sequence of arguments preceding any provided when the new function is called.
MDN documentation
The length property indicates the number of arguments expected by the function.
MDN documentation
A Function object's read-only name property indicates the function's
name as specified when it was created or "anonymous" for functions
created anonymously.
MDN documentation
The toString() method returns a string representing the source code of the function.
MDN documentation
Returns the Function
value of this JS value if it's an instance of a
function.
If this JS value is not an instance of a function then this returns
None
.
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 valueOf()
method returns the primitive value of the
specified object.
MDN documentation
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 from when coming back out from the 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 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
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
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
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
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
Mutably 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
)
🔬 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