我正在尝试创建一个 HTML 页面，如果选择了月份，正确的日期将显示在表格中。
我有一个函数可以获取今天的月份，并且用户可以在月份之间切换，但我不确定如何获取所有日期。
我不需要显示数字，只需要显示该月各天的适量空表行/表数据。
例如，当选择网页时，今天的月份是 februari，将显示一个包含当前日期的空表:即，将显示 29 个空表 - 如果您决定滚动到另一天。
var month = new Date();
var index = month.getMonth();
var months = ["Januari", "Februari", "Mars", "April", "Maj", "Juni", "Juli", "Augusti", "September", "Oktober", "November", "December"];
document.getElementById("todayField").innerHTML = months[month.getMonth()];
function next() {
var months = ["Januari", "Februari", "Mars", "April", "Maj", "Juni", "Juli", "Augusti", "September", "Oktober", "November", "December"];
var nextMonth = index + 1 > 11 ? 0 : index + 1;
index = nextMonth
document.getElementById("todayField").innerHTML = months[nextMonth];
}
function prev() {
var months = ["Januari", "Februari", "Mars", "April", "Maj", "Juni", "Juli", "Augusti", "September", "Oktober", "November", "December"];
var nextMonth = index - 1 < 0 ? 11 : index - 1;
index = nextMonth
// console.log(nextMonth)
document.getElementById("todayField").innerHTML = months[nextMonth];
}
document.getElementById("prev").addEventListener("click", function() {
prev();
})
document.getElementById("next").addEventListener("click", function() {
next();
})<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
</head>
<body>
<p>Click to change day</p>
<button type="button" name="btnPrev" onclick="prev()"><</button>
<button type="button" name="btnNext" onclick="next()">></button>
<p id="todayField"></p>
<p>You can find the days below</p>
</body>
</html>提前致谢! :)
最佳答案
我将创建一个返回所选月份的天数的函数。 https://stackoverflow.com/a/47188148/3793309有它需要的东西:
function daysInMonth(month, year) {
var days;
switch (month) {
case 1: // Feb, our problem child
var leapYear = ((year % 4 == 0) && (year % 100 != 0)) || (year % 400 == 0);
days = leapYear ? 29 : 28;
break;
case 3: case 5: case 8: case 10:
days = 30;
break;
default:
days = 31;
}
return days;
},
您可以使用您月份的索引来调用此函数，例如三月:
[...]
var months = ["Januari","Februari","Mars","April","Maj","Juni","Juli","Augusti","September","Oktober", "November", "December"];
var index = months.indexOf("Mars");
var year = 2018;
var count = daysInMonth(index, year);
这应该足以满足您的需求。
第
关于javascript - 如何通过javascript根据变量显示内容？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/48579382/