轻量级的日期插件--datebox

jquery的日期插件有好几款，H5中的input也可以自带日期选择。但为什么要再写一个，有两个理由，一个是引用的文件太大，而有时候只需要很简单的功能，二个是想加一些自定义的效果不好改。

我写的这个功能比较简单，可以换月，有预约效果，可以设定预约日期范围，压缩后1.4kb，先上个图，再慢慢解释：

js代码：

$.fn.datebox = function (options) {
    var config = {
        $valueEle: $("#outputTime"),
        $prev: $(".datetitle #up"),
        $next: $(".datetitle #down"),
        minDate:null,
        maxDate:null,
    }
    config = $.extend(config, options);
    Date.prototype.format = function (format) {
        var o = {
            "M+": this.getMonth() + 1, //month
            "d+": this.getDate(), //day
            "h+": this.getHours(), //hour
            "m+": this.getMinutes(), //minute
            "s+": this.getSeconds(), //second
            "q+": Math.floor((this.getMonth() + 3) / 3), //quarter
            "S": this.getMilliseconds() //millisecond
        }
        if (/(y+)/.test(format))
            format = format.replace(RegExp.$1,
                (this.getFullYear() + "").substr(4 - RegExp.$1.length));
        for (var k in o)
            if (new RegExp("(" + k + ")").test(format))
                format = format.replace(RegExp.$1,
                    RegExp.$1.length == 1 ? o[k] :
                        ("00" + o[k]).substr(("" + o[k]).length));
        return format;
    };
    var self = this;
    var $ele = $(this);
      
    var maxdate,mindate; 
    var nstr = new Date();  
    var ynow = nstr.getFullYear();  
    var mnow = nstr.getMonth();  
    var dnow = nstr.getDate();  
     if(!config.minDate){
           mindate=nstr;
     }else{
       mindate=new Date(config.mindate)
     } 
     if(config.maxDate){
        maxdate=new Date(config.maxDate)
     }

    self.isLeap = function (year) {
        return (year % 100 == 0 ? res = (year % 400 == 0 ? 1 : 0) : res = (year % 4 == 0 ? 1 : 0));
    }
     console.log("最小日期是:",mindate.format("yyyy-MM-dd"))
     console.log("最大日期是:",maxdate.format("yyyy-MM-dd"))
     console.log("当前日期：",currentDate())
    pain();
    function pain() {
        var n1str = new Date(ynow, mnow, 1); //当月第一天 
        var firstday = n1str.getDay(); //当月第一天星期几
        var m_days = new Array(31, 28 + self.isLeap(ynow), 31, 30, 31, 30, 31, 31, 30, 31, 30, 31); //各月份的总天数
        var tr_str = Math.ceil((m_days[mnow] + firstday) / 7); //表格所需要行数

        //打印表格第一行（有星期标志）
        $("#datetb").remove();
        var str = "<table id='datetb' cellspacing='0'><tr><td>周日</td><td>周一</td><td>周二</td><td>周三</td><td>周四</td><td>周五</td><td>周六</td></tr>";
        for (i = 0; i < tr_str; i++) { //表格的行
            str += "<tr>";
            for (k = 0; k < 7; k++) { //表格每行的单元格
                idx = i * 7 + k; //单元格自然序列号
                date_str = idx - firstday + 1; //计算日期
                (date_str <= 0 || date_str > m_days[mnow]) ? date_str = "&nbsp;" : date_str = idx - firstday + 1; //过滤无效日期（小于等于零的、大于月总天数的）
                //打印日期：今天底色样式
                date_str == dnow ? str += "<td class='selected' data-day=" + date_str + ">" + "<div>" + date_str + "</div>" + "<div class='subscribe'>预约</div>" + "</td>" : str += "<td  data-day=" + date_str + ">" + date_str + "</td>";
            }
            str += "</tr>"; //表格的行结束
        }
        str += "<tfoot><tr><td colspan='7'>" + ynow + "年" + (mnow + 1) + "月</td></tr></tfoot>";
        str += "</table>"; //表格结束
        $ele.html(str);
        setDate(ynow, mnow, dnow);
    }

    function setDate(y, m, d) {
        var current = (new Date(y, m, d, 10, 0, 0)).format("yyyy-MM-dd");
        console.log(y, m, d, current);
        config.$valueEle.val(current);
    }
    function currentDate(){
        return (new Date(ynow, mnow, dnow, 10, 0, 0)).format("yyyy-MM-dd");
    }
    self.prev=function(){
       var temp = mnow - 1;
        if (temp < 0) {
            mnow = 11;
            ynow--;
        } else {
             var prevdate=new Date(ynow, mnow-1, 31, 10, 0, 0);
            if (prevdate <mindate) {
                console.log("超过最小可预约日期",prevdate.format("yyyy-MM-dd"))
                return;
            }
            mnow--;
        }
         if(ynow==mindate.getFullYear()&&mnow==mindate.getMonth()){
                 var _mday=mindate.getDate();
                if(dnow<_mday) dnow=_mday;
            }
        pain(); 
    }
    self.next=function(){
           var nextdate=new Date(ynow, mnow+1, 1, 10, 0, 0);
            if (nextdate>maxdate) {
                console.log("超过最大可预约日期",nextdate.format("yyyy-MM-dd"))
                return ; 
            }
          var temp = mnow + 1;
        if (temp > 11) {
            mnow = 0;
            ynow++;
        } else {
            mnow++;
        }
          if(ynow==maxdate.getFullYear()&&mnow==maxdate.getMonth()){
                var _mday=maxdate.getDate();
                if(dnow>_mday) dnow=_mday;
            }
        pain();  
    }
    self.seleted=function($td){
       if (!$td.hasClass('selected')) {
            var day = $td.data("day");
             var selectedDate=new Date(ynow, mnow, day, 1, 0, 0);
            if (selectedDate<mindate||selectedDate>maxdate) {
                 console.log("该日期不能预约");
                return;
            }
            $(".datebox table td").removeClass('selected').children('.subscribe').remove();
           $td.addClass('selected');
           $td.html('<div>' + $td.html() + '</div><div class="subscribe">预约</div>');
           dnow=day;
            setDate(ynow, mnow, day);
        }
    }
    self.getDate=function(){
       return currentDate();
    }

    $ele.on("click", "table td", function () {
      self.seleted($(this));
    });
    config.$prev.click(function () {
     self.prev();
    });
   config.$next.click(function () {
      self.next();
    });  
    return self;
}

css：随便玩了。

body {
font-family: Helvetica,Microsoft JhengHei;
font-size:1.5rem;
}
*{ padding:0; margin:0;}
.content {
padding-top: 11%;
font-family: hyxmtj,Microsoft JhengHei;
text-shadow: 0.5px 1px 1px #e3eab7;
}
.datetitle {
width: 100%;
background: #fed700;
text-align: center;
line-height: 3rem;
-moz-border-radius: 1.7rem;
-webkit-border-radius: 1.7rem;
border-radius: 1.7rem;
border-bottom: 0.25rem solid #d1a802;
color: black;
text-shadow: 1px 1px 1px #d1a802;
position: relative;
}
.datetitle:before {
content: "";
position: absolute;
width: 62%;
border-left: 0.5rem solid #d1a802;
border-right: 0.5rem solid #d1a802;
height: 1.5rem;
bottom: -1.5rem;
left: 0;
margin-left: 17%;

}
.datebox{ border:1px solid #d1a802;margin: 0 auto; margin-top: 1.2rem; width:68%; -moz-border-radius:1.5rem; -webkit-border-radius:1.5rem; border-radius:1.5rem; padding:0 1rem; font-size:0.7rem; background:white; text-shadow:none;}
.datebox table{width:100%; border:none;}
.datebox table td{ width: 2rem;height: 2rem;text-align: center;border: 1px solid transparent;}
.datebox table td div{ font-size: small; }
.datebox table td.selected{border:1px solid #deaa5d; color:#deaa5d; }
.datebox table td.selected .subscribe{display:block;}
.datebox table td .subscribe{display:none;}
.datebox table tfoot td{ font-weight: bold;}
.databox #up ,.databox #down {
cursor: pointer;
}
.datetitle #down {
float: right;
margin-right:2rem;
}
.datetitle #up {
float: left;
margin-left:2rem;
}
.datetitle #up:hover ,.datetitle #down:hover {
color: green;
}

body {
    font-family: Helvetica,Microsoft JhengHei;
    font-size:1.5rem;
}
*{ padding:0; margin:0;}
.content {
    padding-top: 11%;
    font-family: hyxmtj,Microsoft JhengHei;
    text-shadow: 0.5px 1px 1px #e3eab7;
}
.datetitle {
    width: 100%;
    background: #fed700;
    text-align: center;
    line-height: 3rem;
    -moz-border-radius: 1.7rem;
    -webkit-border-radius: 1.7rem;
    border-radius: 1.7rem;
    border-bottom: 0.25rem solid #d1a802;
    color: black;
    text-shadow: 1px 1px 1px #d1a802;
    position: relative;
}
.datetitle:before {
    content: "";
    position: absolute;
    width: 62%;
    border-left: 0.5rem solid #d1a802;
    border-right: 0.5rem solid #d1a802;
    height: 1.5rem;
    bottom: -1.5rem;
    left: 0;
    margin-left: 17%;

}
.datebox{ border:1px solid #d1a802;margin: 0 auto; margin-top: 1.2rem; width:68%; -moz-border-radius:1.5rem; -webkit-border-radius:1.5rem; border-radius:1.5rem; padding:0 1rem;  font-size:0.7rem; background:white; text-shadow:none;}
.datebox table{width:100%; border:none;}
.datebox table td{ width: 2rem;height: 2rem;text-align: center;border: 1px solid transparent;}
.datebox table td div{ font-size: small; }
.datebox table td.selected{border:1px solid #deaa5d; color:#deaa5d; }
.datebox table td.selected .subscribe{display:block;}
.datebox table td .subscribe{display:none;}
.datebox table tfoot td{ font-weight: bold;}
.databox #up  ,.databox #down {
    cursor: pointer;
}
.datetitle #down {
    float: right;
    margin-right:2rem;
}
.datetitle #up {
    float: left;
    margin-left:2rem;
}
.datetitle #up:hover ,.datetitle #down:hover {
    color: green;
}

公布了isLeap，next，prev，getdate，seleted 五个方法(看名字就不需要解释了吧)。默认今天是最小的预约时间。

可以这样设定最大的可预约时间：

 var date = $(".datebox").datebox({maxDate:"2016-12-20"});

换月的时候日期会自动切换到可预约的日期。

demo下载：https://files.cnblogs.com/files/stoneniqiu/datebox.zip   样式不喜欢的可以自己去改动。功能上要增增渐渐也很方便。