#promises code explainers

typescript

type RetryOptions = {
  retries?: number;
  timeoutMs?: number;
  baseDelayMs?: number;

Retry with timeout and backoff in TypeScript

promises retry exponential-backoff

Intermediate 10 steps

javascript

import Papa from 'papaparse';
 
const MAX_SIZE = 5 * 1024 * 1024;

Validating and parsing CSV uploads in the browser

promises csv-parsing validation

Intermediate 8 steps

javascript

async function* fetchPages(baseUrl, maxPages) {
  let page = 1;
  while (page <= maxPages) {
    const data = await mockFetch(`${baseUrl}?page=${page}`);

Paginated APIs with async generators

async-iterators generators pagination

Advanced 7 steps

javascript

const PENDING = 'pending';
const FULFILLED = 'fulfilled';
const REJECTED = 'rejected';

Building a Promise from scratch

promises state-machine microtasks

Advanced 10 steps