@humanspeak/svelte-motion/dist/utils/promise.js

Framer Motion for Svelte 5. Declarative motion.<tag> components with AnimatePresence exit animations, gestures (hover, tap, drag, focus, in-view), variants, FLIP layout animations, shared-layout transitions, spring physics, and scroll-linked motion values

/**
 * Returns true if the provided value appears to be Promise-like.
 *
 * A value is considered Promise-like if it is a non-null object that exposes a
 * callable `then` function. This conservative check avoids throwing on
 * primitives and is resilient to different Promise implementations.
 *
 * @param value Value to test.
 * @return Whether `value` is Promise-like.
 */
export const isPromiseLike = (value) => {
    return (typeof value === 'object' &&
        value !== null &&
        'then' in value &&
        typeof value.then === 'function');
};
/**
 * Narrows to objects that expose a `finished` Promise.
 *
 * Motion's `animate` may return an object with a `finished` Promise, or a
 * then-able control. This helper provides a safe type-guard for the former.
 *
 * @typeParam T Input object type.
 * @param value Value to inspect.
 * @return Whether `value.finished` is a Promise.
 */
export const hasFinishedPromise = (value) => {
    return (typeof value === 'object' &&
        value !== null &&
        'finished' in value &&
        isPromiseLike(value.finished));
};