the time interval in milliseconds for throttling
Optional base_equals: EqualityCheck<T>use an optional customized equality checking function. otherwise the default prev_value === new_value comparison will be used
a throttled version of the equality checking function which would prematurely return a true if called too frequently (ie within delta_time_ms interval since the last actual equality checking)
const { createState, createMemo, createEffect } = createContext()
const [A, setA] = createState(0)
const B = createMemo((id) => {
return A(id) ** 0.5
}, { equals: throttlingEquals(500) }) // at least 500ms must pass before `B` propagates itself onto `C`
const [C, fireC] = createEffect((id) => {
// SOME EXPENSIVE COMPUTATION OR EFFECT //
console.log("C says Hi!, and B is of the value:", B(id))
}, { defer: false })
// it is important that you note that `B` will be recomputed each time `setA(...)` is fired.
// it is only that `B` won't propagate to `C` (even if it changes in value) if at least 500ms have not passed
setInterval(() => setA(A() + 1), 10)
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transforms a regular equality check function (SimpleSignalConfig.equals) into a one that throttles when called too frequently.
this means that a signal composed of this as its
equalsfunction will limit propagating itself further, until at leastdelta_time_msamount of time has passed since the last time it was potentially propagated.