import ConcurrencyRequest from '@jswork/concurrency-request';

const urls = [];
for (let i = 1; i <= 10; i++) {
  urls.push(`https://jsonplaceholder.typicode.com/todos/${i}`);
}

function request(opts, callback) {
  fetch(opts.data)
    .then((r) => r.json())
    .then((data) => {
      callback({ success: true, data });
    })
    .catch((data) => {
      callback({ success: false, data });
    });
}

ConcurrencyRequest.start(urls, { max: 3, request }).then((res) => {
  console.log(res);
});