taggedjs/js/state/promise.function.js

tagged template reactive html

import { createTrigger } from './callback.function.js';
import { getContextInCycle } from '../tag/cycles/setContextInCycle.function.js';
import { setUseMemory } from './setUseMemory.object.js';
import { state } from './state.function.js';
const emptyCallback = () => undefined;
/** Attach a promise to the render cycle so resolve triggers a re-render. */
export function promise(target) {
    const context = getContextInCycle();
    const callbackState = state({ callback: emptyCallback });
    const promiseState = state({ current: undefined });
    const trigger = state(() => createTrigger(context, setUseMemory.stateConfig, callbackState));
    if (promiseState.current !== target) {
        promiseState.current = target;
        const currentPromise = target;
        target.then(() => {
            if (promiseState.current !== currentPromise) {
                return;
            }
            trigger();
        });
    }
}
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