TanTan
e311ca3275
Build NapCat Artifacts / Windows Loader Test (push) Canceled after 0s
Build NapCat Artifacts / Type Check & Test (push) Canceled after 0s
Build NapCat Artifacts / Build NapCat.Framework (push) Canceled after 0s
Build NapCat Artifacts / Build NapCat.Shell (push) Canceled after 0s
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
import { collectMotionValues, motionValue } from './index.mjs';
|
|
import { subscribeValue } from './subscribe-value.mjs';
|
|
|
|
/**
|
|
* Create a `MotionValue` that transforms the output of other `MotionValue`s by
|
|
* passing their latest values through a transform function.
|
|
*
|
|
* Whenever a `MotionValue` referred to in the provided function is updated,
|
|
* it will be re-evaluated.
|
|
*
|
|
* ```jsx
|
|
* const x = motionValue(0)
|
|
* const y = transformValue(() => x.get() * 2) // double x
|
|
* ```
|
|
*
|
|
* @param transformer - A transform function. This function must be pure with no side-effects or conditional statements.
|
|
* @returns `MotionValue`
|
|
*
|
|
* @public
|
|
*/
|
|
function transformValue(transform) {
|
|
const collectedValues = [];
|
|
/**
|
|
* Open session of collectMotionValues. Any MotionValue that calls get()
|
|
* inside transform will be saved into this array.
|
|
*/
|
|
collectMotionValues.current = collectedValues;
|
|
const initialValue = transform();
|
|
collectMotionValues.current = undefined;
|
|
const value = motionValue(initialValue);
|
|
subscribeValue(collectedValues, value, transform);
|
|
return value;
|
|
}
|
|
|
|
export { transformValue };
|