compose-async

Like compose, but functions can return Promises

var composeAsync = require('compose-async');

var deleteFriends = composeAsync(deleteUsersFriends, findUserById);

deleteFriends(3453).then((deletedFriends) => /* ... */);

var composeAsync = require('compose-async');
 
function reverse(srt) {
  return str.split('').reverse().join('');
}
 
function nl2br(str) {
  return str.replace(/\n/g, '<br />');
}
 
function fetchLinkTitles(str) {
  // Async magic
  return new Promise(function(resolve, reject) {
    resolve(str.replace(
      /https?:\/\/\S+/g,
      'California man bitten while taking selfie with rattlesnake'
    ));
  });
}
 
const defaultTextFormatter = composeAsync(nl2br, fetchLinkTitles, reverse);
 
defaultTextFormatter('hello everyone check this site out https://www.reddit.com/').then(function(formatted) {
  console.log(formatted); // ekanselttar htiw eifles gnikat elihw nettib nam ainrofilaC tuo etis siht kcehc enoyreve olleh
});