jqueryPromise.js

function fun1(){
  var dfd=$.Deferred();
  setTimeout(function(){
    console.log('---fun1---');
    console.log((new Date()));
    dfd.resolve();
  },2000);
  return dfd.promise();
}
function fun2(){
  var dfd=$.Deferred();
  setTimeout(function(){
    console.log('---fun2---');
    console.log((new Date()));
    dfd.resolve();
  },2000);
  return dfd.promise();
}
//-----1
// fun1().done(fun2).done(function(data){
//   console.log('---done function---');
//   console.log((new Date()));
// });

//-----2
fun1().done(function(){
  fun2().done(function(data){
    setTimeout(function(){
      console.log('---done function---');
      console.log((new Date()));
    },1000)
  })
});