js自定义日历
https://www.cnblogs.com/zimengxiyu/p/12568477.html
js日历插件
实现思路:获取每个月的第一天是星期几,然后把前面的天数填充为空,在获取每个月有多少天,循环填充,判断并给给当前时间添加单独样式,点击上一月,和下一月时改变月份。
获取当前月第一天:返回值是 0(周日) 到 6(周六) 之间的一个整数
var date = new Date();
var y=date.getFullYear();
var m=date.getMonth();
new Date(y,m,1).getDay();
获取当前月有多少天
var date = new Date();
var y=date.getFullYear();
var m=date.getMonth();
new Date(y,m+1,-1).getDate()+1;
最后点击上一月,下一月月份加一或减一,在执行封装的日历函数。
全部代码:
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<head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <style> * { margin: 0; padding: 0; } body {
background: #2c3e50;
}
.calendar {
width: 400px;
margin: 50px auto;
}
.calendar-tip {
font-size: 16px;
text-align: center;
color: #fff;
}
.prev {
float: left;
cursor: pointer;
}
.next {
float: right;
cursor: pointer;
}
.calendar-month {
text-align: center;
margin: 10px 0;
color: #fff;
}
ul {
list-style: none;
display: flex;
}
li {
width: 57px;
text-align: center;
height: 55px;
line-height: 55px;
font-size: 16px;
color: #fff;
}
.calendar-day {
display: flex;
}
.calendar-day span {
flex: 1;
color: #fff;
text-align: center;
height: 40px;
line-height: 40px;
}
.calendar-data {
display: flex;
flex-wrap: wrap;
}
li {
width: 57px;
cursor: pointer;
}
li:hover {
background: #2d3436;
}
.calendar-data .on {
color: #d63031;
}
</style>
</head>
<body>
<div class="calendar">
<div class="calendar-tip">
<span class="prev">上一月</span>
<em id="year">2022年</em>
<span class="next">下一月</span>
</div>
<div class="calendar-month">五月</div>
<div class="calendar-day">
<span>日</span>
<span>一</span>
<span>二</span>
<span>三</span>
<span>四</span>
<span>五</span>
<span>六</span>
</div>
<ul class="calendar-data">
<li>1</li>
<li>1</li>
<li>1</li>
<li>1</li>
<li>1</li>
<li>1</li>
<li>1</li>
</ul>
</div>
<script>
var date = new Date();
var year = document.querySelector("#year");
var month = document.querySelector(".calendar-month");
var calendarData = document.querySelector(".calendar-data");
var prev = document.querySelector(".prev");
var next = document.querySelector(".next");
var monthArr = ["一月", "二月", "三月", "四月", "五月", "六月", "七月", "八月", "九月", "十月", "十一月", "十二月"];
var y,m,day,d,html,today;
calendar();
function calendar() {
y = date.getFullYear();
year.innerHTML = y + "年";
m = date.getMonth();
month.innerHTML = monthArr[m];
day = new Date(y, m, 1).getDay(); //获取每个月第一天是周几
d = new Date(y, m + 1, -1).getDate() + 1; //获取多少天
html = "";
//把每个月第一天之前的时间填充为空
for (var i = 0; i < day; i++) {
html += "<li> </li>";
}
for (var j = 1; j <= d; j++) {
if (y==new Date().getFullYear() && m==new Date().getMonth() && j== date.getDate()) {
html += "<li class='on'>" + j + "</li>";
} else {
html += "<li>" + j + "</li>";
}
}
calendarData.innerHTML = html;
}
prev.onclick = function () {
date.setMonth(date.getMonth() - 1);
calendar();
}
next.onclick = function () {
date.setMonth(date.getMonth() + 1);
calendar();
}
</script>
</body>
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效果: