這篇文章主要為大家詳細(xì)介紹了javascript中Date對(duì)象應(yīng)用之簡(jiǎn)易日歷實(shí)現(xiàn),具有一定的參考價(jià)值,感興趣的小伙伴們可以參考一下
前面的話(huà)
簡(jiǎn)易日歷作為javascript中Date對(duì)象的常見(jiàn)應(yīng)用,用途較廣泛,本文將詳細(xì)說(shuō)明簡(jiǎn)易日歷的實(shí)現(xiàn)思路。
HTML說(shuō)明
使用type=number的兩個(gè)input分別作為年和月的輸入控件,這樣在高級(jí)瀏覽器下自帶調(diào)節(jié)按鈕
按照周日到周一的順序進(jìn)行星期的排列
<div class="box">
<header class='control'>
<input id="conYear" class="con-in" type="number" min="1900" max="2100" step="1"/>
<input id="conMonth" class="con-in" type="number" min="1" max="12" step="1"/>
</header>
<div class="DateBox">
<header class='week'>
<div class="week-in">周日</div>
<div class="week-in">周一</div>
<div class="week-in">周二</div>
<div class="week-in">周三</div>
<div class="week-in">周四</div>
<div class="week-in">周五</div>
<div class="week-in">周六</div>
</header>
<section class="dayBox" id='dayBox'>
<div class="day" id="day1">1</div>
<div class="day">2</div>
<div class="day">3</div>
<div class="day">4</div>
<div class="day">5</div>
<div class="day">6</div>
<div class="day">7</div>
<div class="day">8</div>
<div class="day">9</div>
<div class="day">10</div>
<div class="day">11</div>
<div class="day">12</div>
<div class="day">13</div>
<div class="day">14</div>
<div class="day">15</div>
<div class="day">16</div>
<div class="day">17</div>
<div class="day">18</div>
<div class="day">19</div>
<div class="day">20</div>
<div class="day">21</div>
<div class="day">22</div>
<div class="day">23</div>
<div class="day">24</div>
<div class="day">25</div>
<div class="day">26</div>
<div class="day">27</div>
<div class="day">28</div>
<div class="day">29</div>
<div class="day" id="day30">30</div>
<div class="day" id="day31">31</div>
</section>
</div>
</div>
CSS說(shuō)明
對(duì)于簡(jiǎn)易日歷的實(shí)現(xiàn),首先確定日歷中class="day"的div的排列方式為浮動(dòng)。這樣可以通過(guò)改變第一天div的位置,來(lái)實(shí)現(xiàn)所有同級(jí)div都可以跟隨移動(dòng)的效果
body{
margin: 0;
}
input{
border: none;
padding: 0;
}
.box{
width: 354px;
margin: 30px auto 0;
}
.DateBox{
height: 300px;
border: 2px solid black;
}
.week{
overflow: hidden;
border-bottom: 1px solid black;
line-height: 49px;
}
.week-in{
height: 49px;
float: left;
width: 50px;
text-align: center;
}
.dayBox{
overflow: hidden;
}
.day{
float: left;
height: 50px;
width: 50px;
font:20px/50px '微軟雅黑';
text-align: center;
}
.control{
overflow: hidden;
}
.con-in{
height: 50px;
float: left;
width: 100px;
text-align: center;
font: 20px/50px "微軟雅黑";
}
JS說(shuō)明
簡(jiǎn)易日歷的JS邏輯總共需要5個(gè)實(shí)現(xiàn):
【1】需要獲取當(dāng)月的天數(shù),獲取當(dāng)月第一天、第30天、第31天是周幾
【2】根據(jù)當(dāng)月第一天的星期,改變第一天的margin-left值,移動(dòng)第一天到對(duì)應(yīng)的位置;由于浮動(dòng)的關(guān)系,其余天也會(huì)跟著移動(dòng)到對(duì)應(yīng)的位置
【3】根據(jù)當(dāng)月的天數(shù),隱藏多余的天;當(dāng)然,隱藏之前要先顯示在其他月份可能被隱藏的天
【4】如果當(dāng)月30日是周日,則會(huì)新占一行。這時(shí)通過(guò)改變30日這天的margin值將其移動(dòng)到第一行(若31日可能會(huì)新占一行,也做相似處理)
【5】載入頁(yè)面后,獲取當(dāng)前的年和月,顯示當(dāng)月日歷;當(dāng)改變年或月時(shí),獲取改變后的值,更新日歷
//準(zhǔn)備:獲取當(dāng)前樣式
function getCSS(obj,style){
if(window.getComputedStyle){
return getComputedStyle(obj)[style];
}
return obj.currentStyle[style];
}
//實(shí)現(xiàn)一:獲取當(dāng)月的天數(shù),及當(dāng)月第一天、第30日、第31日是星期幾
function get_data(year,month){
var result = {};
var d = new Date();
//如果是2月
if(month == 2){
//如果是閏年
if((year % 4 === 0 && year % 100 !== 0) || year % 400 === 0){
result.days = 29;
//如果是平年
}else{
result.days = 28;
}
//如果是第4、6、9、11月
}else if(month == 4 || month == 6 ||month == 9 ||month == 11){
result.days = 30;
}else{
result.days = 31;
//當(dāng)月第31天是星期幾
result.day31week = d.getDay(d.setFullYear(year,month-1,31));
}
//當(dāng)月第一天是星期幾
result.day1week = d.getDay(d.setFullYear(year,month-1,1));
if(month != 2){
//當(dāng)月第30天是星期幾
result.day30week = d.getDay(d.setFullYear(year,month-1,30));
}
return result;
}
//實(shí)現(xiàn)二:根據(jù)當(dāng)月第一天的星期x,設(shè)置第一天的margin-left=寬度*x,使其對(duì)應(yīng)到正確的星期位置上
function move_day1(year,month){
var week1 = get_data(year,month).day1week;
day1.style.marginLeft = week1%7*parseInt(getCSS(day1,'width'))+ 'px';
}
//實(shí)現(xiàn)三:根據(jù)當(dāng)月的天數(shù),來(lái)隱藏多余的天數(shù)。當(dāng)然首先要先顯示在其他月份被隱藏的天數(shù)
function hide_days(year,month){
//恢復(fù)其他月份可能隱藏的天數(shù)
for(var i = 28; i<31; i++){
dayBox.children[i].style.display = 'block';
}
//隱藏當(dāng)月多余的天數(shù)
var days = get_data(year,month).days;
for(var i = days;i<31;i++){
dayBox.children[i].style.display = 'none';
}
};
//實(shí)現(xiàn)四:如果當(dāng)月30日或31日是星期日,則會(huì)新占一行,通過(guò)設(shè)置margin-top把新占一行的天移動(dòng)到第一行
function move_day30(year,month){
//如果當(dāng)月30日是星期日
if(get_data(year,month).day30week === 0){
day30.style.marginTop = parseInt(getCSS(day30,'height')) *(-5) + 'px';
day31.style.marginTop = parseInt(getCSS(day31,'height')) *(-5) + 'px';
day31.style.marginLeft= getCSS(day31,'width');
return;
}else{
day30.style.marginTop = day31.style.marginTop = day31.style.marginLeft ='0';
}
//如果當(dāng)月31日是星期日
if(get_data(year,month).day31week === 0){
day31.style.marginTop = parseInt(getCSS(day31,'height')) *(-5) + 'px';
}else{
day31.style.marginTop = '0';
}
}
//實(shí)現(xiàn)五:當(dāng)載入頁(yè)面時(shí),獲取當(dāng)前年和月,顯示當(dāng)月日歷;當(dāng)改變年或月時(shí),獲取改變后的年和月,更新當(dāng)月日歷
var year= conYear.value=new Date().getFullYear();
var month= conMonth.value = new Date().getMonth() + 1;
move_day1(year,month);
hide_days(year,month);
move_day30(year,month);
conYear.onchange = conMonth.onchange = function(){
var year = conYear.value;
var month = conMonth.value;
if(year<1900 || year >2100 ){
year = conYear.value=new Date().getFullYear();
}
if(month<1 || month > 12){
month = conMonth.value=new Date().getMonth() + 1;
}
move_day1(year,month);
hide_days(year,month);
move_day30(year,month);
}
以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助