最初我让这段代码工作，但后来我决定不要每次都动态创建表格，而只是需要在表格中填充的文本。我不知道这是否是动态创建日历的最有效方法，所以也请告诉我是否有更好的方法（我更喜欢将其保留为 JavaScript）。我不明白为什么不再创建我的表，因此我们将不胜感激。
HTML-
<head>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="styles.css">
<!-- Dynamically create the calendar -->
<script type="text/javascript" src="calendar.js">
window.onload = function(){
var cal = new Calendar();
cal.drawCalendar();
}
</script>
</head>
<body>
<!-- Create the calendar object -->
<table class="calendar">
<tr>
<th class="header" colspan="7"></th>
</tr>
<tr>
<td class="headerdays">Sun</td>
<td class="headerdays">Mon</td>
<td class="headerdays">Tue</td>
<td class="headerdays">Wed</td>
<td class="headerdays">Thu</td>
<td class="headerdays">Fri</td>
<td class="headerdays">Sat</td>
</tr>
<tr class ="days">
</tr>
</table>
<!-- Add buttons to change the calendar month -->
<button class="calButton" onclick="cal.prevMonth()"><span> Prev </span></button>
<button class="calButton" onclick="cal.nextMonth()"><span> Next </span></button>
</body>
JavaScript-
// these are labels for the days of the week
cal_days_labels = ['Sun', 'Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat'];
// these are human-readable month name labels, in order
cal_months_labels = ['January', 'February', 'March', 'April',
'May', 'June', 'July', 'August', 'September',
'October', 'November', 'December'];
// these are the days of the week for each month, in order
cal_days_in_month = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
// this is the current date
cal_current_date = new Date();
//Constructor function for Calendar
function Calendar(month, year) {
this.month = (isNaN(month) || month == null) ? cal_current_date.getMonth() : month;
this.year = (isNaN(year) || year == null) ? cal_current_date.getFullYear() : year;
}
//Generates the needed HTML for the calendar
Calendar.prototype.generateHTML = function(){
// get first day of month
var firstDay = new Date(this.year, this.month, 1);
var startingDay = firstDay.getDay();
// find number of days in month
var monthLength = cal_days_in_month[this.month];
// Compensate for leap year
if (this.month == 1) { // February only!
if((this.year % 4 == 0 && this.year % 100 != 0) || this.year % 400 == 0){
monthLength = 29;
}
}
// Fill in month and year for header
var monthName = cal_months_labels[this.month];
document.getElementsByClassName("header")[0].innerHTML = monthName + " " + this.year;
// fill in the days
var html += '';
var day = 1;
// this loop is for is weeks (rows)
for (var i = 0; i < 9; i++) {
html += '<tr>';
// this loop is for weekdays (cells)
for (var j = 0; j <= 6; j++) {
html += '<td class="day">';
if (day <= monthLength && (i > 0 || j >= startingDay)) {
html += day;
day++;
}
html += '</td>';
}
html += '</tr>';
// stop making rows if we've run out of days
if (day > monthLength) {
break;
}
}
//Write the days to the screen
document.getElementsByClassName("days")[0].innerHTML = html;
}
//Writes the calendar to the screen
Calendar.prototype.drawCalendar = function() {
//Generates the HTML and write HTML to screen
this.generateHTML();
}
//Sets the calendar to previous month
Calendar.prototype.prevMonth = function() {
//Set the month back by one
this.month = (this.month != 0) ? this.month - 1 : 11;
this.year = (this.month != 11) ? this.year : this.year - 1;
this.drawCalendar();
}
//Sets the calendar to next month
Calendar.prototype.nextMonth = function() {
//Set the month forward by one
this.month = (this.month != 11) ? this.month + 1 : 0;
this.year = (this.month != 0) ? this.year : this.year + 1;
this.drawCalendar();
}
您应该为您的代码创建一个不同的
<script><script type="text/javascript" src="calendar.js"></script>
<script type="text/javascript">
window.onload = function() {
var cal = new Calendar();
cal.drawCalendar();
}
...
</script>