Delay queue for javascript.

delayQueue.js

$.queue = function(queue) {
  var q = queue.sort(function(a, b) {
      return a.delay - b.delay;
    }),
    next, pre = {
      delay: 0
    };
  var run = function() {
    next = q.shift();
    if (!next) return;
    setTimeout(function() {
      next.fn();
      pre = next;
      return run();
    }, next.delay - pre.delay);
  };
  return {
    run: run
  };
}

$.queue([{
  delay: 1000,
  fn: function() {
    console.log('1---')
  }
}, {
  delay: 3000,
  fn: function() {
    console.log('2---')
  }
}, {
  delay: 2000,
  fn: function() {
    console.log('3---')
  }
}]).run();