Vidmich

!function() {
  var a = 1,
      b = 2,
      c = 3;

  console.log(a + b);
  console.log(a*b*c);
}();

Vidmich

function delay(v, t) {
  var d = jQuery.Deferred();

  setTimeout(function() {
    d.resolve(v);
  }, t);

  return d.promise();
}

Vidmich

!function() {
  var a = delay(1, 1000),
      b = delay(2, 2000),
      c = delay(3, 3000);

  console.log(a + b);
  console.log(a*b*c);
}();

Vidmich

function async(f) {
  var g = f(); // get generator
  
  function h(v, e) {
    var t = e ? g.throw(e) : g.send(v);
    if (t.done)
      return;

    if (t.value.then) {
      t.value.then(function(v) {

Vidmich

async(function*() {
  var a = yield delay(1, 1000),
      b = yield delay(2, 2000),
      c = yield delay(3, 3000);

  console.log(a + b);
  console.log(a*b*c);
});

Vidmich

async(function*() {
  var a = delay(1, 1000),
      b = delay(2, 2000),
      c = delay(3, 3000);

  a = yield a;
  b = yield b;
  console.log(a + b);

  c = yield c;

Vidmich

async(function*() {
  try {
    var a = delay(1, 1000),
        b = delay(2, 2000),
        c;

    try {
      c = delay(3, 3000);
    } catch(e) {
      // something happened with "c" calculation

Vidmich

try {
  async(function*() {
    var a = yield delay(1, 1000);
    throw new Error('some error');
  });
} catch(e) {
  console.log(e);
}

Vidmich

function async(f) {
  var d = jQuery.Deferred();

  var g = f(); // get generator
  
  function h(v, e) {
    var t;
    try {
      t = e ? g.throw(e) : g.send(v);
    } catch(e) {

Vidmich

async(function*() {
  try {
    yield async(function*() {
      var a = yield delay(1, 1000);
      throw new Error('some error');
    });
  } catch(e) {
    console.log(e);
  }
});