search

Home >Web Front-end >JS Tutorial >Pure javascript version of calendar control

Pure javascript version of calendar control

高洛峰
高洛峰Original
2017-01-04 13:42:041550browse

I can only code during my off-duty time, so I wrote a pure javascript version in my spare time. Reference the calendar.js file, and then set the id of the input to be set as a calendar control to calendar, and the input will become a calendar control.

Pure javascript version of calendar control

<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>日历控件</title>
<script src="js/calendar.js" defer></script>
</head>
 
<body>
<input id="calendar" type="text" />
</body>
</html>

When referencing calendar.js, be sure to add the defer attribute.

calendar.js source code: 

// JavaScript Document
var days = new Array("日","一","二","三","四","五","六");//星期
var today = new Date();//当天日期，备用
var month_big = new Array("1","3","5","7","8","10","12"); //包含所有大月的数组
var month_small = new Array("4","6","9","11"); //包含所有小月的数组
var separator = "-";//间隔符 
 
var calendar = document.getElementById("calendar");
var cal_parent = calendar.parentNode;//获取父元素
var cal_width = ((calendar.clientWidth<150) ? 150 : calendar.clientWidth);//获取input的宽度，如果input宽度小于150，调整为150，150为日历块最小宽度
var cal_height = calendar.clientHeight;//获取input的高度，整数
var cal_X = calendar.offsetLeft;//获取input左边 距父元素的距离，整数
var cal_Y = calendar.offsetTop;//获取input顶部 距父元素的距离，整数
 
calendar.style.cursor = "pointer";//将input的鼠标设置成小手
calendar.readOnly = "readOnly";//设置input为只读
calendar.onblur = hideCalendar; //当input失去焦点时，隐藏cal_body
calendar.onclick = showCalendar;//点击input时调用showCalendar函数
 
//取input宽度的七分之一再减一作为方格的边长
var pane_height = cal_width/7 - 1; 
 
function hideCalendar(){
 var cal_body = document.getElementById("cal_body");
 if(cal_body != undefined){
  cal_body.parentNode.removeChild(cal_body);
 }
}
 
//显示日历主体
function showCalendar(){
 var cal_body = document.getElementById("cal_body");
 if(cal_body != undefined){
  cal_body.parentNode.removeChild(cal_body);
 }
 else{
  var cal_body = document.createElement("DIV");
  cal_body.id = "cal_body";
  cal_body.style.width = cal_width + "px";
  cal_body.style.height = "auto";
  cal_body.style.overflow = "hidden";
  cal_body.style.position = "absolute";
  cal_body.style.zIndex = "9";
  cal_body.style.left = cal_X + "px";
  cal_body.style.top = (cal_Y + cal_height + 5) + "px";
  cal_body.style.border = "solid 1px #CCCCCC";
  //鼠标移动到cal_body上时，禁用input的onblur事件，防止cal_body因input失去焦点而被隐藏
  cal_body.onmouseover = function(){
   calendar.onblur = undefined;
  }
  //鼠标从cal_body移除时，启用input的onblur事件，并且先让input获得焦点，否则当在cal_body上空白处点击后再移出在其他地方点击时，input因没有焦点而无法触发onblur事件
  cal_body.onmouseout = function(){
   calendar.focus();
   calendar.onblur = hideCalendar;
  }
  cal_parent.appendChild(cal_body);
     
  var line1 = document.createElement("DIV");
  line1.style.width = cal_width + "px";
  line1.style.height = pane_height + "px";
  line1.style.backgroundColor = "#0FF";
   
  var btn1 = document.createElement("DIV");
  btn1.style.width = (cal_width/3 - 3) + "px";
  btn1.style.height = pane_height + "px";
  btn1.style.lineHeight = pane_height + "px";
  btn1.style.textAlign = "center";
  btn1.innerHTML = "<";
  btn1.style.cursor = "pointer";
  btn1.style.cssFloat = "left";
  btn1.onclick = function(){
   if(isValidated()){
    var old_year = parseInt(document.getElementById("input_year").value);
    if(old_year > 1960){
     var year = old_year - 1;
     var month = parseInt(document.getElementById("input_month").value);
     var val = year + separator + month + separator + 1;
     init(val);
    }
   }
  };
  line1.appendChild(btn1);
   
  var input_year = document.createElement("INPUT");
  input_year.id = "input_year";
  input_year.style.width = (cal_width/3) + "px";
  input_year.style.height = "70%";
  input_year.style.cssFloat = "left";
  input_year.style.textAlign = "center";
  input_year.onchange = function(){
   changed();
  };
  line1.appendChild(input_year);
   
  var btn2 = document.createElement("DIV");
  btn2.style.width = (cal_width/3 - 3) + "px";
  btn2.style.height = pane_height + "px";
  btn2.style.lineHeight = pane_height + "px";
  btn2.style.textAlign = "center";
  btn2.innerHTML = ">";
  btn2.style.cursor = "pointer";
  btn2.style.cssFloat = "left";
  btn2.onclick = function(){
   if(isValidated()){
    var old_year = parseInt(document.getElementById("input_year").value);
    if(old_year < 2050){
     var year = old_year + 1;
     var month = parseInt(document.getElementById("input_month").value);
     var val = year + separator + month + separator + 1;
     init(val);
    }
   }
  };
  line1.appendChild(btn2);
   
  var line2 = document.createElement("DIV");
  line2.style.width = cal_width + "px";
  line2.style.height = pane_height + "px";
  line2.style.backgroundColor = "#0FF";
   
  var btn3 = document.createElement("DIV");
  btn3.style.width = (cal_width/3 - 3) + "px";
  btn3.style.height = pane_height + "px";
  btn3.style.lineHeight = pane_height + "px";
  btn3.style.textAlign = "center";
  btn3.innerHTML = "<";
  btn3.style.cursor = "pointer";
  btn3.style.cssFloat = "left";
  btn3.onclick = function(){
   if(isValidated()){
    var old_month = parseInt(document.getElementById("input_month").value)
    if(old_month > 1){
     var year = parseInt(document.getElementById("input_year").value);
     var month = old_month - 1;
     var val = year + separator + month + separator + 1;
     init(val);
    }
    else {
     var year = parseInt(document.getElementById("input_year").value) - 1;
     var month = 12;
     var val = year + separator + month + separator + 1;
     init(val);
    }
   }
  };
  line2.appendChild(btn3);
   
  var input_month = document.createElement("INPUT");
  input_month.id = "input_month";
  input_month.style.width = (cal_width/3) + "px";
  input_month.style.height = "70%";
  input_month.style.cssFloat = "left";
  input_month.style.textAlign = "center";
  input_month.onchange = function(){
   changed();
  };
  line2.appendChild(input_month);
   
  var btn4 = document.createElement("DIV");
  btn4.style.width = (cal_width/3 - 3) + "px";
  btn4.style.height = pane_height + "px";
  btn4.style.lineHeight = pane_height + "px";
  btn4.style.textAlign = "center";
  btn4.innerHTML = ">";
  btn4.style.cursor = "pointer";
  btn4.style.cssFloat = "left";
  btn4.onclick = function(){
   if(isValidated()){
    var old_month = parseInt(document.getElementById("input_month").value)
    if(old_month < 12){
     var year = parseInt(document.getElementById("input_year").value);
     var month = parseInt(document.getElementById("input_month").value) + 1;
     var val = year + separator + month + separator + 1;
     init(val);
    }
    else {
     var year = parseInt(document.getElementById("input_year").value) + 1;
     var month = 1;
     var val = year + separator + month + separator + 1;
     init(val);
    }
   }
  };
  line2.appendChild(btn4);
   
  cal_body.appendChild(line1);
  cal_body.appendChild(line2);
   
  for(var i=0; i < 7; i++){
   var pane = document.createElement("DIV");
   pane.className = "pane";
   pane.style.width = pane_height + "px";
   pane.style.height = pane_height + "px";
   pane.style.lineHeight = pane_height + "px";
   pane.style.textAlign = "center";
   pane.style.cssFloat = "left";
   pane.innerHTML = days[i];
   cal_body.appendChild(pane);
  }  
  init(calendar.value); 
 } 
}
 
function init(val){
 clearPane();
    
 var cal_body = document.getElementById("cal_body");
 var temp_date;
 var year;
 var month;
 var date;
  
 if(val == ""){
  temp_date = today;
  calendar.value = today.toFormatString(separator);
 }
 else{
  year = val.year();
  month = val.month(separator);
  date = val.date(separator);
  temp_date = new Date(year,month,date); 
 }
   
 year = temp_date.getFullYear();
 month = temp_date.getMonth() + 1;
 date = temp_date.getDate();
 temp_date.setDate(1);
  
 var start = temp_date.getDay() + 7;
 var end;
  
 if(array_contain(month_big, month)){
  end = start + 31;
 }
 else if(array_contain(month_small, month)){
  end = start + 30;
 }
 else{
  if(isLeapYear(year)){
   end = start + 29;
  }
  else{
   end = start + 28;
  }
 }
  
 for(var i = 7; i < start; i++){
  var pane = document.createElement("DIV");
  pane.className = "pane";
  pane.style.width = pane_height + "px";
  pane.style.height = pane_height + "px";
  pane.style.lineHeight = pane_height + "px";
  pane.style.textAlign = "center";
  pane.style.cssFloat = "left";
  cal_body.appendChild(pane);
 }
  
 for(var i = start; i < end; i++){  
  var pane = document.createElement("DIV");
  pane.className = "pane";
  pane.style.width = pane_height + "px";
  pane.style.height = pane_height + "px";
  pane.style.lineHeight = pane_height + "px";
  pane.style.textAlign = "center";
  pane.style.cssFloat = "left";
  pane.innerHTML = i - start + 1;
  pane.style.cursor = "pointer";
  pane.onmouseover = function(){
   this.style.backgroundColor = &#39;#0FF&#39;;
  }
  if(date == (i - start + 1))
   pane.style.backgroundColor = &#39;#0FF&#39;;
  else{
   pane.onmouseout = function(){
    this.style.backgroundColor = &#39;&#39;;
   }
  }
  pane.onclick = function(){
   calendar.value = year + separator + month + separator + this.innerHTML;
   cal_body.parentNode.removeChild(cal_body);  
  }
  cal_body.appendChild(pane);
   
  document.getElementById("input_year").value = year;
  document.getElementById("input_month").value = month;
 }
}
 
//格式化输出
Date.prototype.toFormatString = function(separator){
 var result = this.getFullYear() + separator + (this.getMonth() + 1) + separator + this.getDate();
 return result;
};
 
//从格式化字符串中获取年份
String.prototype.year = function(){
 var str = this.substring(0,4);
 return str;
};
 
//从格式化字符串中获取月份
String.prototype.month = function(separator){
 var start = this.indexOf(separator) + 1;
 var end = this.lastIndexOf(separator);
 return parseInt(this.substring(start, end)) - 1;
};
 
//从格式化字符串中获取日期
String.prototype.date = function(separator){
 var start = this.lastIndexOf(separator) + 1;
 return this.substring(start);
};
 
//判断数组array中是否包含元素obj的函数，包含则返回true，不包含则返回false
function array_contain(array, obj){
 for (var i = 0; i < array.length; i++){
  if (array[i] == obj)
   return true;
 }
 return false;
}
 
//判断年份year是否为闰年，是闰年则返回true，否则返回false
function isLeapYear(year){
 var a = year % 4;
 var b = year % 100;
 var c = year % 400;
 if( ( (a == 0) && (b != 0) ) || (c == 0) ){
  return true;
 }
 return false;
}
 
//清除方格
function clearPane(){
 var limit = document.getElementsByClassName("pane").length;
 for(var i=7; i < limit; i++){
  var pane = document.getElementsByClassName("pane").item(7);
  pane.parentNode.removeChild(pane);
 }
}
 
//判断输入是否合法
function isValidated(){
 var year = document.getElementById("input_year").value;
 var month = document.getElementById("input_month").value;
 if(isNaN(year) || isNaN(month)){
  alert("请输入正确的年份/月份");
  return false;
 }
 else{
  if(year%1 != 0 || month%1 != 0){
   alert("请输入正确的年份/月份");
   return false;
  }
  else{
   year = parseInt(year);
   if(year < 1960 || year > 2050){
    alert("请输入1960~2050之间的年份！");
    return false;
   }
   else if(month < 1 || month >12){
    alert("请输入正确的月份！");
    return false;
   }
   else{
    return true;
   }
  }
 }
}
 
//年份月份发生变化时处理函数
function changed(){
 if(isValidated()){
  var year = document.getElementById("input_year").value;
  var month = document.getElementById("input_month").value;
  var val = year + separator + month + separator + 1;
  init(val);
 }
}

The above is the entire content of this article. I hope it will be helpful to everyone’s learning. I also hope that everyone will support the PHP Chinese website.

For more articles related to the pure javascript version of the calendar control, please pay attention to the PHP Chinese website!


Statement：
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Previous article：Use of replace() method in javascriptNext article：Use of replace() method in javascript

Related articles

See more