A function to be executed later, usually by scalajs-react in response to some kind of event.
The purpose of this class is to lift effects into the type system, and use the compiler to ensure safety around callbacks (without depending on an external library like Cats).
() => Unit
is replaced by Callback
. Similarly, ReactEvent => Unit
is replaced by ReactEvent => Callback
.
Type parameters
- A
-
The type of result produced when the callback is invoked.
Attributes
- Since
-
0.10.0
- Companion
- object
- Graph
-
- Supertypes
-
class AnyValtrait Matchableclass Any
- Self type
-
CallbackTo[A]
Members list
Value members
Concrete methods
Creates a new callback that returns true
when both this and the given callback return true
.
Creates a new callback that returns true
when both this and the given callback return true
.
Attributes
Alias for >>
.
Alias for >>
.
Where >>
is often associated with Monads, *>
is often associated with Applicatives.
Attributes
Sequence actions, discarding the value of the second argument.
Sequence actions, discarding the value of the second argument.
Attributes
Sequence a callback to run before this, discarding any value produced by it.
Sequence a callback to run before this, discarding any value produced by it.
Attributes
Convenient version of <<
that accepts an Option
Convenient version of <<
that accepts an Option
Attributes
Alias for tap
.
Alias for tap
.
Attributes
Sequence a callback to run after this, discarding any value produced by this.
Sequence a callback to run after this, discarding any value produced by this.
Attributes
Alias for flatMap
.
Alias for flatMap
.
Attributes
Turns this into an AsyncCallback that runs whenever/wherever it's called; setTimeout
isn't used.
Turns this into an AsyncCallback that runs whenever/wherever it's called; setTimeout
isn't used.
In order words, this.toAsyncCallback.toCallback
== this
.
Attributes
Schedules this to run asynchronously (i.e. uses a setTimeout
).
Schedules this to run asynchronously (i.e. uses a setTimeout
).
Exceptions will be handled by the AsyncCallback such that this.async.toCallback
will never throw an exception.
Attributes
Wraps this callback in a try-catch and returns either the result or the exception if one occurs.
Wraps this callback in a try-catch and returns either the result or the exception if one occurs.
Attributes
Creates an debounce boundary over the underlying computation.
Creates an debounce boundary over the underlying computation.
Save the result of this as a val
somewhere because it relies on internal state that must be reused.
Attributes
Creates an debounce boundary over the underlying computation.
Creates an debounce boundary over the underlying computation.
Save the result of this as a val
somewhere because it relies on internal state that must be reused.
Attributes
Creates an debounce boundary over the underlying computation.
Creates an debounce boundary over the underlying computation.
Save the result of this as a val
somewhere because it relies on internal state that must be reused.
Attributes
Run asynchronously after a delay of a given duration.
Run asynchronously after a delay of a given duration.
Attributes
Run asynchronously after a delay of a given duration.
Run asynchronously after a delay of a given duration.
Attributes
Run asynchronously after a startInMilliseconds
ms delay.
Run asynchronously after a startInMilliseconds
ms delay.
Attributes
Runs this computation in the background.
Runs this computation in the background.
Attributes
Function distribution. See CallbackTo.liftTraverse(f).id
for the dual.
Function distribution. See CallbackTo.liftTraverse(f).id
for the dual.
Attributes
Wraps this callback in a try-finally
block and runs the given callback in the finally
clause, after the current callback completes, be it in error or success.
Wraps this callback in a try-finally
block and runs the given callback in the finally
clause, after the current callback completes, be it in error or success.
Attributes
Log to the console before this callback starts, and after it completes.
Log to the console before this callback starts, and after it completes.
Does not change the result.
Attributes
Log the duration of this callback's execution.
Log the duration of this callback's execution.
Attributes
Log the duration of this callback's execution.
Log the duration of this callback's execution.
Value parameters
- name
-
Prefix to appear the log output.
Attributes
Log the duration of this callback's execution.
Log the duration of this callback's execution.
Attributes
Logs the result of this callback as it completes.
Logs the result of this callback as it completes.
Attributes
Logs the result of this callback as it completes.
Logs the result of this callback as it completes.
Value parameters
- name
-
Prefix to appear the log output.
Attributes
Logs the result of this callback as it completes.
Logs the result of this callback as it completes.
Attributes
Return a version of this callback that will only execute once, and reuse the result for all other invocations.
Return a version of this callback that will only execute once, and reuse the result for all other invocations.
Attributes
Convenience-method to run additional code before this callback.
Convenience-method to run additional code before this callback.
Attributes
Limits the number of invocations in a given amount of time.
Limits the number of invocations in a given amount of time.
Attributes
- Returns
-
Some if invocation was allowed, None if rejected/rate-limited
Limits the number of invocations in a given amount of time.
Limits the number of invocations in a given amount of time.
Attributes
- Returns
-
Some if invocation was allowed, None if rejected/rate-limited
Limits the number of invocations in a given amount of time.
Limits the number of invocations in a given amount of time.
Attributes
- Returns
-
Some if invocation was allowed, None if rejected/rate-limited
Limits the number of invocations in a given amount of time.
Limits the number of invocations in a given amount of time.
Attributes
- Returns
-
Some if invocation was allowed, None if rejected/rate-limited
Limits the number of invocations in a given amount of time.
Limits the number of invocations in a given amount of time.
Attributes
- Returns
-
Some if invocation was allowed, None if rejected/rate-limited
Returns a CallbackOption that requires the boolean value therein to be true.
If this completes successfully, discard the result. If any exception occurs, call printStackTrace
and continue.
If this completes successfully, discard the result. If any exception occurs, call printStackTrace
and continue.
Attributes
- Since
-
2.0.0
Discard the callback's return value, return a given value instead.
Discard the callback's return value, return a given value instead.
ret
, short for return
.
Attributes
Executes this callback, on the current thread, right now, blocking until complete. Exceptions will not be thrown, not caught. Use CallbackTo#attempt to catch exceptions.
Executes this callback, on the current thread, right now, blocking until complete. Exceptions will not be thrown, not caught. Use CallbackTo#attempt to catch exceptions.
Typically, callbacks are passed to scalajs-react and you're expected not to call this method yourself. Generally speaking, the only time you should call this method is in some other non-React code's async callback. Inside an AJAX callback is a common example. Even for those cases though, you can avoid calling this by getting direct access instead of callback-based access to your component; see the online WebSockets example: https://japgolly.github.io/scalajs-react/#examples/websockets
While it's technically safe to call CallbackTo#runNow inside the body of another Callback, it's better to just use combinators like CallbackTo#flatMap or even a Scala for-comprehension.
Attributes
Schedule for repeated execution every interval
.
Schedule for repeated execution every interval
.
Attributes
Schedule for repeated execution every interval
.
Schedule for repeated execution every interval
.
Attributes
Schedule this callback for repeated execution every interval
milliseconds.
Schedule this callback for repeated execution every interval
milliseconds.
Value parameters
- interval
-
duration in milliseconds between executions
Attributes
- Returns
-
A means to cancel the interval.
Schedule this callback for execution in interval
.
Schedule this callback for execution in interval
.
Note: in most cases delay is a better alternative.
Attributes
- Returns
-
A means to cancel the timeout.
Schedule this callback for execution in interval
.
Schedule this callback for execution in interval
.
Note: in most cases delay is a better alternative.
Attributes
- Returns
-
A means to cancel the timeout.
Schedule this callback for execution in interval
milliseconds.
Schedule this callback for execution in interval
milliseconds.
Note: in most cases delayMs is a better alternative.
Value parameters
- interval
-
duration in milliseconds to wait
Attributes
- Returns
-
A means to cancel the timeout.
When the callback result becomes available, perform a given side-effect with it.
When the callback result becomes available, perform a given side-effect with it.
Attributes
Convenience-method to run additional code after this callback.
Convenience-method to run additional code after this callback.
Attributes
Negates the callback result (so long as it's boolean).
Negates the callback result (so long as it's boolean).
Attributes
The underlying representation of this value-class
The underlying representation of this value-class
Attributes
Discard the value produced by this callback.
Discard the value produced by this callback.
Attributes
Discard the value produced by this callback.
Discard the value produced by this callback.
This method allows you to be explicit about the type you're discarding (which may change in future).
Attributes
Conditional execution of this callback.
Conditional execution of this callback.
Value parameters
- cond
-
The condition required to be
true
for this callback to execute.
Attributes
- Returns
-
Some
result of the callback executed, elseNone
.
Conditional execution of this callback. Discards the result.
Conditional execution of this callback. Discards the result.
Value parameters
- cond
-
The condition required to be
true
for this callback to execute.
Attributes
Record the duration of this callback's execution.
Record the duration of this callback's execution.
Attributes
Alias for map
.
Alias for map
.
Attributes
Creates a new callback that returns true
when either this or the given callback return true
.
Creates a new callback that returns true
when either this or the given callback return true
.
Attributes
Deprecated methods
Negates the callback result (so long as it's boolean).
Negates the callback result (so long as it's boolean).
Attributes
- Deprecated
- true