如何在Moment.js中区分一个月和一个月的第一天

Question

In moment I am parsing dates from CSV, with the option to add formatting.

Sometimes the dates are dates and will be handled as points in time. Sometimes the dates are fragments, describing a year, a month and so on. This will be handled as a range.

See the following code:

var a = moment('Jun 2014');
var b = moment('01-06-2014');

//output
a.toDate(); // Sun Jun 01 2014 00:00:00 GMT+0200 (CEST)
b.toDate(); // Sun Jun 01 2014 00:00:00 GMT+0200 (CEST)

I understand that a missing day will be interpreted as day 0 (or 1) but is there any way for me to differentiate between the date 1st June and the month June when parsing dates?

Answer 1

Maybe it would be easiest to wrap your date parsing in another function that attaches metadata to the result. Here's a rough idea:

function parseDate(d) {
  var ret = moment(d);

  if(d.indexOf('-') === -1) {
    ret.monthOnly = true;
  }

  return ret;
}