Partial channels: Produce true if the current value is cleared.
,Channels: Produce false with the first received value.
,Buffers: Produce a new value once a row is added or removed.
Unlike mapPure
, stores mapping locally.
Unlike mapPure
, stores mapping locally. This is currently needed as
widget objects are not immutable.
f
must not be side-effecting
Negation of isEmpty
State channels: Produce when a new child is attached and if the size changes. In Opt the size is reset if the value is cleared.
,Channels: The size is only produced in response to each received value on the channel.
,Buffers: Produce the row count once a row is added or removed.