Struct XSignal 

pub struct XSignal<T>(/* private fields */);

A mutable value that callbacks can subscribe to.

• Derived signals
• ReactiveClosures re-compute and update HTML nodes when signals change

Implementations

impl<T> XSignal<T>

pub fn derive<U>( &self, name: impl Into<XString>, to: impl Fn(&T) -> U + 'static, from: impl Fn(&T, &U) -> Option<T> + 'static, ) -> XSignal<U>

where T: Debug + 'static, U: Debug + Eq + 'static,

pub fn view<U>( &self, name: impl Into<XString>, to: impl Fn(&T) -> U + 'static, ) -> XSignal<U>

where T: Debug + 'static, U: Debug + Eq + 'static,

impl<T> XSignal<T>

pub fn downgrade(&self) -> XSignalWeak<T>

impl<T> XSignal<T>

pub fn new(name: impl Into<XString>, value: T) -> Self

Create a new signal.

The name of the signal is used in console logs, does not have to be unique.

pub fn add_subscriber(&self, closure: impl Fn(T) + 'static) -> Consumers

where T: Clone + 'static,

Registers a callback that will trigger when the signal is updated.

pub fn get_value_untracked(&self) -> T

where T: Clone,

Gets the current value of the signal.

Reactive behavior should use XSignal::add_subscriber.

impl<T: Debug + 'static> XSignal<T>

pub fn set(&self, new_value: impl Into<T>)

where T: Eq,

Updates the signal by setting a new value.

pub fn update<R, U>(&self, compute: impl FnOnce(&T) -> U) -> R

where U: Into<UpdateSignalResult<Option<T>, R>>,

Updates the signal by computing a new value from the old one.

pub fn update_mut<R, U>(&self, compute: impl FnOnce(&mut T) -> U) -> R

where U: Into<UpdateSignalResult<T, R>>,

Updates the signal by computing a new value from the old one.

The old value is mutable and can be reused to compute the new value.

pub fn force(&self, new_value: impl Into<T>)

Updates the signal by setting a new value.

Contrary to XSignal::set, the signal triggers even if the value didn’t change.

Trait Implementations

impl<T> Clone for XSignal<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for XSignal<T>

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

Formats the value using the given formatter.

impl<T> Deref for XSignal<T>

type Target = XSignalInner<T>

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<V> From<&XSignal<V>> for MutableSignal<V>

fn from(signal: &XSignal<V>) -> Self

Converts to this type from the input type.

impl<V> From<XSignal<V>> for MutableSignal<V>

fn from(signal: XSignal<V>) -> Self

Converts to this type from the input type.

impl<T: Send> Send for XSignal<T>

Safe because Javascript is single-threaded.

impl<T: Sync> Sync for XSignal<T>

Safe because Javascript is single-threaded.