iteragain/dist/esm/promiseAll.js

Javascript Iterable/Iterator/Generator-function utilities.

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
import toIterator from './toIterator';
import toArray from './toArray';
/** Calls `Promise.all` on all collected values, optionally limiting concurrent in-flight promises. */
export function promiseAll(arg_1) {
    return __awaiter(this, arguments, void 0, function* (arg, { concurrency = Infinity } = {}) {
        if (concurrency <= 0)
            throw new Error('Concurrency must be positive');
        if (concurrency === Infinity)
            return Promise.all(toArray(arg));
        const results = [];
        const executing = new Set();
        const iterator = toIterator(arg);
        let next;
        while (!(next = iterator.next()).done) {
            const promise = next.value;
            results.push(promise);
            const executingPromise = Promise.resolve(promise).finally(() => {
                executing.delete(executingPromise);
            });
            executing.add(executingPromise);
            if (executing.size >= concurrency) {
                yield Promise.race(executing);
            }
        }
        return Promise.all(results);
    });
}
export default promiseAll;
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