Signals
Signals are the cornerstone of reactivity in solidart
. They contain values that change over time; when you change a signal's value, it automatically updates anything that uses it.
To create a signal, let's import createSignal and call it like this:
Next create the signal with:
final counter = createSignal(0);
The argument passed to the create call is the initial value, and the return value is the signal.
To retrieve the current signal value use:
counter.value; // 0
// or
counter(); // 0
To update the current signal value you can use:
counter.value++; // increase by 1
// or
counter.value = 5; // sets the value to 5
// or
counter.update((v) => v * 2); // update based on the current value
Don't forget to call the
dispose()
method when you no longer need the signal.counter.dispose();