Javascriptでカレンダーをうまく表示させたい。

#実現したいこと
2023/1までのカレンダーを表示したいのですが、2022/12と2023/1が表示しません。どなたかご教示いただければ幸いです。
#発生している問題

#コード

//html
<!doctype html>
<html>
<head>
<title>sample</title>
<meta charset="utf-8" />
<link rel="stylesheet" type="text/css" href="css/cal.css">
</head>
<body>
 <div id="cal21" class="cal_wrapper"> 10</div>
 <div id="cal22" class="cal_wrapper"> 11</div>
 <div id="cal23" class="cal_wrapper"> 12</div>
 <div id="cal24" class="cal_wrapper"> 1</div>   
<script type="text/javascript" charset="UTF-8" src="js/cal.js"></script>
</body>
</html>

//css
div.cal_wrapper {
 padding: 10px 0px;}
div.cal_wrapper table.cal tr td {
 font-size: 10px; text-align: center; padding: 2px;}
div.cal_wrapper table.cal tr.headline {
 background-color: #EEE;}

//js
// charset UTF-8
var calObj = new Array();
//
calObj[0] = new Object();
calObj[0].defaultMonth = 0;
calObj[0].daysClass = new Object();
calObj[0].xDaysLater = new Array();
calObj[0].xDays = new Array();
calObj[0].week = new Array();
calObj[0].month = new Object();
calObj[0].backward = '';
calObj[0].click = false;
calObj[0].priority = new Array('week','xDay','xDaysLater','day','backward');
//
calObj[21] = cal_clone(calObj[0]);
calObj[21].defaultMonth = 21; 
calObj[22] = cal_clone(calObj[0]);
calObj[22].defaultMonth = 22; 
calObj[23] = cal_clone(calObj[0]);
calObj[23].defaultMonth = 23; 
calObj[24] = cal_clone(calObj[0]);
calObj[24].defaultMonth = 24; 
//
calObj.calendars = new Array();
calObj.days = new Array(0,31,28,31,30,31,30,31,31,30,31,30,31);
calObj.weekName = new Array("日","月","火","水","木","金","土");
calObj.monthName = new Array('','1月','2月','3月','4月','5月','6月','7月','8月','9月','10月','11月','12月');
calObj.date = new Date();
calObj.date = new Date(calObj.date.getFullYear() + "/" + (calObj.date.getMonth() + 1) + "/" + calObj.date.getDate() + " 00:00:00");
calObj.day = calObj.date.getDate();
calObj.month = 1;
calObj.year = calObj.date.getFullYear();
calObj.currentList = null;

function cal_init(){	
	
var d = window.document;
var tagObj = d.getElementsByTagName("div");
var calToday = new Date();
for(var i=0;i<tagObj.length;i++){
if(tagObj[i].className == "cal_wrapper"){
var calId = Number(tagObj[i].id.substring(3,tagObj[i].id.length));
calObj.calendars.push(calId);
if(0 < (calObj.month + calObj[calId].defaultMonth) && (calObj.month + calObj[calId].defaultMonth) < 13)
calObj[calId].currentMonth = new Date((calObj.year)+"/"+(1 + calObj[calId].defaultMonth)+"/"+"1 00:00:00");
else 
calObj[calId].currentMonth = new Date((calObj.year+1)+"/"+((calObj.month + calObj[calId].defaultMonth)%12)+"/"+"1 00:00:00");
cal_create(calId);
}
}
}
function cal_create(calId){
var d = window.document;
var day = calObj[calId].currentMonth.getDate();
var month = calObj[calId].currentMonth.getMonth() + 1;
var year = calObj[calId].currentMonth.getFullYear();
var week = calObj[calId].currentMonth.getDay();
var tdTextListArr = new Array();
var bisDay = 0;
var MonthDays = calObj.days[month];
var WeekCnt = new Array();
if(month == 2){
if(year % 100 == 0 || year % 4 != 0){
if(year % 400 != 0)
bisDay = 0;
else
bisDay = 1;
}
else if(year % 4 == 0)
bisDay = 1;
else
bisDay = 0;
}
MonthDays += bisDay;
var calHTML = "<table border='0' cellspacing='0' cellpadding='0' class='cal'>";
calHTML += "<tr><th colspan='7'>";

calHTML += "<p>" + year + "年" + calObj.monthName[month] + "</p></th></tr>";
calHTML += "<tr class='headline'>";
for(var i=0;i<calObj.weekName.length;i++)
calHTML += "<td>" + calObj.weekName[i] + "</td>";
calHTML += "</tr><tr>";
for(var i=0;i<week;i++)
calHTML += "<td>&nbsp;</td>";
for(dayCnt=1;dayCnt<=(calObj.days[month]+bisDay);dayCnt++){
var dayStr = year + "/" + month + "/" + dayCnt;
var dayStrN = month + "/" + dayCnt;
if(WeekCnt[week] == undefined)
WeekCnt[week] = 0;
WeekCnt[week]++;
 
var monStr = '' + month + '-' + week + '-' + WeekCnt[week];
var weekStr = '' + week + '-' + WeekCnt[week];
//alert(weekStr);

var dayClass = new Object();
var dayClassText = new Object();
var currentDayDate = new Date(year + "/" + month + "/" + dayCnt + " 00:00:00");
var laterDay = Math.floor((currentDayDate.getTime() - calObj.date.getTime()) / 1000 / (60 * 60 * 24));
var tdId = "td_"+calId+"_"+year+"_"+month+"_"+dayCnt;
// backward
if(calObj[calId].backward != null && currentDayDate.getTime() < calObj.date.getTime())
dayClass["backward"] = calObj[calId].backward;
// week
if(calObj[calId].month[weekStr] != undefined)
dayClass["week"] = calObj[calId].month[weekStr];
else if(calObj[calId].month[monStr] != undefined)
dayClass["week"] = calObj[calId].month[monStr];
else if(calObj[calId].week[week] != undefined){
if(typeof(calObj[calId].week[week]) == "object" && calObj[calId].week[week][WeekCnt[week]] != undefined){
dayClass["week"] = calObj[calId].week[week][WeekCnt[week]];
 }
else if(calObj[calId].week[week] != undefined && typeof(calObj[calId].week[week]) != "object")
dayClass["week"] = calObj[calId].week[week];
}
// xDay
if(calObj[calId].xDays[dayCnt] != undefined)
dayClass["xDay"] = calObj[calId].xDays[dayCnt];
// xDaysLater
if(calObj[calId].xDaysLater[laterDay] != undefined)
dayClass["xDaysLater"] = calObj[calId].xDaysLater[laterDay];
// day
if(calObj[calId].daysClass[dayStr] != undefined)
dayClass["day"] = calObj[calId].daysClass[dayStr];
else if(calObj[calId].daysClass[dayStrN] != undefined)
dayClass["day"] = calObj[calId].daysClass[dayStrN];
		
var tdClassArr = new Array();
var tdTextArr = new Array();
var tdLinkArr = new Array();
var tdClassStr = "";
var tdTextStr = "";
var tdMouse = "";
var tdClassNames = new Object();
for(var ci=0;ci<calObj[calId].priority.length;ci++){
if(dayClass[calObj[calId].priority[ci]] != undefined){
var splitArr = new Array();
splitArr = dayClass[calObj[calId].priority[ci]].split(';');
tdClassArr.push(splitArr[0]);
tdClassNames[splitArr[0]] = true;
if(splitArr[1] != undefined){
tdTextArr.push(splitArr[1]);
var tdTextListLink = "";
if(splitArr[2] != undefined)
tdTextListLink = " onclick=\"cal_open(\'"+splitArr[2]+"\')\"";
tdTextListArr.push('<ol><li id="'+tdId+'_li" onmouseover="cal_list2day_over(this)" onmouseout="cal_list2day_out(this)" value="'+dayCnt+'"'+tdTextListLink+'>'+splitArr[1]+'</li></ol>');
}
if(splitArr[2] != undefined)
tdLinkArr.push(splitArr[2]);
}
}
if(tdTextArr.length > 0){
tdTextStr = "<span id='"+tdId+"'>";
for(var i=0;i<tdTextArr.length;i++){
tdTextStr += tdTextArr[i] + "<br />";
}
tdTextStr += "</span>";
tdMouse = " onmouseover=\"cal_disp_text(\'"+tdId+"\')\" onmouseout=\"cal_hide_text(\'"+tdId+"\')\"";
tdClassArr.push('pointer');
}
if(tdLinkArr.length > 0)
tdMouse += " onclick=\"cal_open(\'"+tdLinkArr[0]+"\')\"";
else if(calObj[calId].click){
var clickOpenURI = calObj[calId].clickURI;
clickOpenURI = clickOpenURI.replace(/_YEAR_/ig,year);
clickOpenURI = clickOpenURI.replace(/_MONTH_/ig,month);
clickOpenURI = clickOpenURI.replace(/_DAY_/ig,dayCnt);
if((calObj[calId].clickClassName != "" && tdClassNames[calObj[calId].clickClassName]) || calObj[calId].clickClassName == ""){
tdMouse += " onclick=\"cal_open(\'"+clickOpenURI+"\')\"";
tdClassArr.push('pointer');
}
}
if(tdClassArr.length > 0)
tdClassStr = " class='" + tdClassArr.join(' ') + "'";
calHTML += "<td id='"+tdId+"_td'><div"+tdClassStr+tdMouse+">" + dayCnt + tdTextStr + "</div></td>";
if(week == 6){
calHTML += "</tr>";
if(dayCnt < calObj.days[month])
calHTML += "<tr>";
week = 0;
}
else
week++;
}
while(week <= 6 && week != 0){
calHTML += "<td>&nbsp;</td>";
if(week == 6)
calHTML += "</tr>";
week++;
}
calHTML += "</table>";
d.getElementById('cal'+calId).innerHTML = calHTML;
// list
if(d.getElementById('schedule'+calId)){
d.getElementById('schedule'+calId).innerHTML = "";
if(tdTextListArr.length > 0 && d.getElementById('schedule'+calId)){
d.getElementById('schedule'+calId).innerHTML = tdTextListArr.join('');
}
}
// /list
}
function cal_list2day_over(obj){
var d = window.document;
var dayId = obj.id.substring(0,obj.id.indexOf('_li'));
if(d.getElementById(calObj.currentList))
d.getElementById(calObj.currentList).style.backgroundColor = '#FFF';
calObj.currentList = dayId+'_td';
if(d.getElementById(dayId+'_td'))
d.getElementById(dayId+'_td').style.backgroundColor = '#CCC';
}
function cal_list2day_out(obj){
var d = window.document;
var dayId = obj.id.substring(0,obj.id.indexOf('_li'));
if(d.getElementById(calObj.currentList))
d.getElementById(calObj.currentList).style.backgroundColor = '#FFF';
}
function cal_open(uri){
window.open(uri);
}
function cal_disp_text(textId){
var d = window.document;
if(navigator.userAgent.indexOf('MSIE') == -1)
d.getElementById(textId).style.display = "block";
}
function cal_hide_text(textId){
var d = window.document;
d.getElementById(textId).style.display = "none";
}

function cal_move(calId,m){
if(m == null)
calObj[calId].currentMonth = new Date(calObj.year+"/"+(calObj.month)+"/"+"1 00:00:00");
else {
var day = calObj[calId].currentMonth.getDate();
var month = calObj[calId].currentMonth.getMonth() + 1;
var year = calObj[calId].currentMonth.getFullYear();
if(0 < month + m && month + m < 13)
calObj[calId].currentMonth = new Date(year+"/"+(month + m)+"/"+"1 00:00:00");
else if((month + m) < 1){
year--;
month = 12;
calObj[calId].currentMonth = new Date(year+"/"+(month)+"/"+"1 00:00:00");
}
else {
year++;
month = 1;
calObj[calId].currentMonth = new Date(year+"/"+(month)+"/"+"1 00:00:00");
}
}
cal_create(calId);
}
function cal_clone(obj) {
var dest;
if(typeof obj == 'object'){
if(obj instanceof Array){
dest = new Array();
for(i=0;i<obj.length;i++)
dest[i] = cal_clone(obj[i]);
}
else {
dest = new Object();
for(prop in obj)
dest[prop] = cal_clone(obj[prop]);
}
}
else
dest = obj;
return dest;
}
function cal_getMonth(){
}
cal_init();

ku__ra__ge

2021/11/02 11:33

現象が再現できるコードを貼ってください。

greencoop

2021/11/02 14:56

コードを更新いたしました。恐縮ですがご確認いただけますと幸いです。

ku__ra__ge

2021/11/02 17:08 編集

惜しい！コードの最後の行の後ろにも```を入れると見やすくなります。

greencoop

2021/11/02 17:31

なるほど、そういうところも大事なのですね。勉強になります。ありがとうございます！

行動規範の内容に同意します

回答1件

ベストアンサー

できました

function cal_init() 内のelseにて2か所修正点あり

■calObj[calId].currentMonth = new Date((calObj.year + 1) + "/" + ((calObj.month + calObj[calId].defaultMonth) % 12) + "/" + "1 00:00:00");だと、
new Date("2022/0/1 00:00:00")
となりInvalid Dateとなるため余りが0のときは12とする

■new Date((calObj.year + 1)だと年がプラス1固定なので12で割って切り捨てた値をプラスする

javascript
1/*               calObj[calId].currentMonth = new Date((calObj.year + 1) + "/" + ((calObj.month + calObj[calId].defaultMonth) % 12) + "/" + "1 00:00:00"); */
2              calObj[calId].currentMonth = new Date((calObj.year + Math.floor((calObj[calId].defaultMonth)/12)) + "/" + (((calObj.month + calObj[calId].defaultMonth) % 12) == 0 ? 12 : ((calObj.month + calObj[calId].defaultMonth) % 12)) + "/" + "1 00:00:00");