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:

复制代码

<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> 复制代码 效果:

posted @ 2020-09-26 13:15  乌卡拉卡  阅读(301)  评论(0编辑  收藏  举报