Polyfill of Promise.any

Promise.any.js

/**
 * Polyfill of Promise.any
 * @param {Promise[]} promiseList
 * @returns {Promise<Object>} - First fulfilled result form one of promiseList.
 * @throws {Error} - Provide mixed error message and errors property.
 */
const promiseAny = async (promiseList) => {
    return Promise.all(promiseList.map(promise => {
        return promise.then(
            value => {
                throw value;
            },
            error => error,
        );
    })).then(
        (errorList) => {
            const mixedError = new Error(
                errorList.reduce(
                    (message, error) => {
                        return message += `\n` + error.message;
                    },
                    'Mixed Error: ',
                ),
            );
            mixedError.errors = errorList;
            throw mixedError;
        },
        result => result,
    );
};