import type { MeasureUnit } from '../value/value-type';
import type { StyleReader } from './read-style';
/**
 * Builds the "px per 1 unit" function for one element+property context, used by
 * a value type's `convert` to rebase across units. Reads happen at most once per
 * unit (memoized) and only when that unit is actually requested; an unmeasurable
 * unit (no parent, zero/auto computed basis, unknown unit) returns null, which
 * makes the caller snap rather than mix incompatible units.
 */
export declare function createMeasure(element: Element, property: string, read: StyleReader): MeasureUnit;
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