Javascript getTime() returns 与时间对象本身不同的时间

Question

Javascript getTime() returns 与时间对象本身不同的时间。

function doTime(){
  var data = [];
  var newDate = new Date('2020-01-01');

  for (var i = 0; i < 10; i++) {
    newDate.setTime(newDate.getTime() + (1000 * 60 * 60));
    console.log(newDate);                //<<----these times are not the same for some reason, why?
    data.push({'date': newDate});        //<<----these times are not the same for some reason, why?
    }
  console.log(data);
  }

和输出！！

Wed Jan 01 2020 03:00:00 GMT+0200 (Eastern European Standard Time)
Wed Jan 01 2020 04:00:00 GMT+0200 (Eastern European Standard Time)
Wed Jan 01 2020 05:00:00 GMT+0200 (Eastern European Standard Time)
Wed Jan 01 2020 06:00:00 GMT+0200 (Eastern European Standard Time)
Wed Jan 01 2020 07:00:00 GMT+0200 (Eastern European Standard Time)
................

(10) [{…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}, {…}]
0: {date: Wed Jan 01 2020 12:00:00 GMT+0200 (Eastern European Standard Time)}
1: {date: Wed Jan 01 2020 12:00:00 GMT+0200 (Eastern European Standard Time)}
2: {date: Wed Jan 01 2020 12:00:00 GMT+0200 (Eastern European Standard Time)}
3: {date: Wed Jan 01 2020 12:00:00 GMT+0200 (Eastern European Standard Time)}
4: {date: Wed Jan 01 2020 12:00:00 GMT+0200 (Eastern European Standard Time)}
................

顺便说一句，我已经用稍微不同的代码解决了这个问题，但是有人可以解释为什么会这样吗？

Answer 1

您没有在循环中创建新的引用，因此您每次都在改变相同的 newDate。您还调用了 console.log，因此此时它已转换为其控制台格式。

Javascript getTime() returns 与时间对象本身不同的时间

Javascript getTime() returns different time than time object itself

javascript

date

gettime