js 执行完setTimeout再接着执行函数

Posted 2020-08-30 侧耳倾听的世界

var counter = 0;
function increase(){
  var d = jQuery.Deferred();
  var doIncrease = function() {
    if(counter < 10){
        counter++;
        setTimeout(doIncrease, 1000);
    } else {
      d.resolve();
    }
  };
  doIncrease();
  return d.promise();
};

increase().then(function() {
  alert(counter);
});

请看这个例子，是在setTimeOut都执行完之后再alert(counter);