Retry n times

retry.js

/**
 * @example
 *.try {
 *     const result = await retry((attempt) => {
 *         if ( Math.ceil(Math.random() >= .5) ) {
 *             return 'ok';
 *         }
 *
 *.        console.log('-> nope');
 *         throw new Error('Failed after ' + attempt + ' tries');
 *     }, 5);
 *.    console.log('-> success', result);
 * } catch(err) {
 *     console.log('-> failed', err);
 * }
 *
 * @param callback
 * @param maxAttempts (default: 2)
 * @param delayInSeconds (default: .1)
 * @returns {Promise<unknown>}
 */
export async function retry(callback, maxAttempts = 2, delayInSeconds = .1) {
    const execute = async (attempt) => {
        try {
            return await callback(attempt);
        } catch (err) {
            if (attempt === maxAttempts) {
                throw new Error(err);
            } else {
                return await new Promise((resolve) => setTimeout(() => resolve(execute(++attempt)), delayInSeconds));
            }
        }
    };
  
    return await execute(1);
}