Remove Seconds/ Milliseconds from Date convert to

问题:

I have a date object that I want to

1. remove the miliseconds/or set to 0
2. remove the seconds/or set to 0
3. Convert to ISO string

For example:

var date = new Date();
//Wed Mar 02 2016 16:54:13 GMT-0500 (EST)

var stringDate = moment(date).toISOString();
//2016-03-02T21:54:13.537Z

But what I really want in the end is

stringDate = '2016-03-02T21:54:00.000Z'

回答1:

While this is easily solvable with plain javascript (see RobG's answer), I wanted to show you the momentjs solution since you tagged your questions as momentjs:

moment().seconds(0).milliseconds(0).toISOString();

This gives you the current datetime, without seconds or milliseconds.

Working example: http://jsbin.com/bemalapuyi/edit?html,js,output

From the docs: http://momentjs.com/docs/#/get-set/

回答2:

There is no need for a library, simply set the seconds and milliseconds to zero and use the built–in toISOString method:

var d = new Date();
d.setSeconds(0,0);
document.write(d.toISOString());

Note: toISOString is not supported by IE 8 and lower, there is a pollyfil on MDN.

回答3:

A bit late here but now you can:

var date = new Date();

this obj has:

date.setMilliseconds(0);

and

date.setSeconds(0);

then call toISOString() as you do and you will be fine.

No moment or others deps.

回答4:

Pure javascript solutions to trim off seconds and milliseconds (that is remove, not just set to 0). JSPerf says the second funcion is faster.

function getISOStringWithoutSecsAndMillisecs1(date) {
  const dateAndTime = date.toISOString().split('T')
  const time = dateAndTime[1].split(':')
  
  return dateAndTime[0]+'T'+time[0]+':'+time[1]
}

console.log(getISOStringWithoutSecsAndMillisecs1(new Date()))

 
function getISOStringWithoutSecsAndMillisecs2(date) {
  const dStr = date.toISOString()
  
  return dStr.substring(0, dStr.indexOf(':', dStr.indexOf(':')+1))
}

console.log(getISOStringWithoutSecsAndMillisecs2(new Date()))

回答5:

You can use the startOf() method within moment.js to achieve what you want.

Here's an example:

var date = new Date();

var stringDateFull = moment(date).toISOString();
var stringDateMinuteStart = moment(date).startOf("minute").toISOString();

$("#fullDate").text(stringDateFull);
$("#startOfMinute").text(stringDateMinuteStart);

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.11.2/moment.js"></script>
<p>Full date: <span id="fullDate"></span></p>
<p>Date with cleared out seconds: <span id="startOfMinute"></span></p>