10 examples of 'javascript get last day of month' in JavaScript

64
function endofmonth() {
65
    var curr = new Date; // get current date
66
    var lastday = new Date(curr.setDate(30));
67
    var result = lastday.getFullYear()+"-"+(lastday.getMonth() + 1) + "-"
68
        + lastday.getDate();
69
    return result;
70
}

202
function last_month_day() {
203
    var list = [];
204
    var date = getFormatDate(new Date());
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    var year = date.split("-")[0];
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    var mouth = date.split("-")[1];
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    var day = date.split("-")[2]-1;
208
    for (var i=0;i<30;i++){
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        var objM = mouth;
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        var objD = day-i;
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        if(objD<=0){
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            objD = objD+30;
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            objM = mouth -1;
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            objM = "0"+objM
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        }
216
217
        var obj = year+"-"+objM +"-"+objD;
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        list.push(obj)
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    }
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    return list;
221
}

42
export function getDaysInMonth (d) {
43
  const resultDate = getFirstDayOfMonth(d);
44
45
  resultDate.setMonth(resultDate.getMonth() + 1);
46
  resultDate.setDate(resultDate.getDate() - 1);
47
48
  return resultDate.getDate();
49
}

96
function getDaysInMonth(d) {
97
  var resultDate = getFirstDayOfMonth(d);
98
  resultDate.setMonth(resultDate.getMonth() + 1);
99
  resultDate.setDate(resultDate.getDate() - 1);
100
  return resultDate.getDate();
101
}

44
function getDaysInMonth(year, month) {
45
	return 32 - new Date(UTC(year, month, 32)).getUTCDate();
46
};

15
function firstDay(month, year) {
16
    var day = new Date(year, month - 1, 1).getDay();
17
    return (day === 0) ? 7 : day;
18
}

12
getLastMonday(): Date {
13
  let nowDate: Date = this.clock.getDate();
14
  let dayOfWeek = nowDate.getDay() ? nowDate.getDay() : 7;
15
  let daysOffsetInMillis = (dayOfWeek - 1) * WeekCalculator.MILLIS_IN_DAY;
16
  let lastMonday = new Date(nowDate.getTime() - daysOffsetInMillis);
17
18
  lastMonday.setHours(0);
19
  lastMonday.setMinutes(0);
20
  lastMonday.setSeconds(0);
21
  lastMonday.setMilliseconds(0);
22
23
  return lastMonday;
24
}

165
function last_year_month() {
166
  var list = [];
167
  var date = getFormatDate(new Date());
168
  var year = date.split("-")[0];
169
  var mouth = date.split("-")[1];
170
  for (var i=0;i<12;i++){
171
      var objM = mouth-i;
172
      var objY = year;
173
      if(objM<=0){
174
          objM = objM+12;
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          objY = year -1;
176
      }
177
      if(objM<10){
178
          objM = "0"+objM;
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      }
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      var obj = objY +"-"+objM;
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      list.push(obj)
182
183
  }
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  return list;
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}

167
function getLastDayOfMonth(date) {
168
  return date && moment(date).endOf('month');
169
}

120
export function getLastDayOfMonth(date) {
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  return date && moment(date).endOf('month');
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}