原生JavaScript实现一种日历
设计目标：不依赖其他库、兼容一些旧版浏览器、可配置可扩展。
测试页面：
1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>测试日历控件</title> 6 <style> 7 #div1{ 8 width: 256px; 9 height: 202px; 10 box-sizing: border-box; 11 background-color: #fff; 12 box-shadow: 1px 1px 3px #999; 13 position:absolute; 14 left:0px; 15 } 16 #div2 { 17 width: 236px; 18 height: 166px; 19 box-sizing: border-box; 20 background-color: #fff; 21 box-shadow: 1px 1px 3px #999; 22 position:absolute; 23 left:300px; 24 } 25 .select_date{ 26 padding-left: 10px;box-sizing:border-box;width: 100px;height: 30px;background-color: #fff;font-size: 12px;float: left;line-height: 30px; 27 } 28 .span_rq{ 29 width: 60px;display: inline-block; 30 } 31 </style> 32 <script src="DatePicker.js"></script> 33 </head> 34 <body> 35 <div id="div_all_base" style="background-color: beige"> 36 <div id="div1"> 37 38 </div> 39 <div id="div2"> 40 41 </div> 42 <div style="width: 600px;height: 30px;left:600px;position:absolute;float:left" id="div3"> 43 <div style="float: left;line-height: 30px;margin-left: 10px;font-size: 12px;">从</div> 44 <div class="select_date"><span class="span_rq">开始日期</span><img src="image/rili2.jpg" style="margin-left: 10px;width: 20px;margin-top: 6px;cursor: pointer" alt="" onclick="var divs=div_rilis.getElementsByClassName('div_rili');divs[0].style.display='block';divs[1].style.display='none'"></div> 45 <div style="position: absolute;width:256px;height: 202px;top:50px;display: none" class="div_rili"></div> 46 <div style="float: left;line-height: 30px;margin-left: 10px;font-size: 12px;">到</div> 47 <div class="select_date"><span class="span_rq">结束日期</span><img src="image/rili2.jpg" style="margin-left: 10px;width: 20px;margin-top: 6px;cursor: pointer" alt="" onclick="var divs=div_rilis.getElementsByClassName('div_rili');divs[1].style.display='block';divs[0].style.display='none'"></div> 48 <div style="position: absolute;width:256px;height: 202px;top:50px;left:120px;display: none" class="div_rili"></div> 49 </div> 50 </div> 51 </body> 52 <script> 53 var div_rilis=document.getElementById("div3"); 54 55 var apiHost="http://127.0.0.1/api/v1"; 56 var data_enabledate={list_enabledate:[{CBRQ:20201111},{CBRQ:20201112},{CBRQ:20201113},{CBRQ:20201114},{CBRQ:20201115}],type:"ok"}; 57 //用AJAX从后端查询可选日期，需要返回数据的格式与data_enabledate相同 58 //var datepicker1=new DatePicker("datepicker1",{pickcallback:loadPage,bannerBackColor:"rgb(0,112,192)",searchEnableUrl:apiHost+"/public/searchEnableDate"});// 59 //直接用前端数据，设置了点击回调、banner颜色、激活日期 60 var datepicker1=new DatePicker("datepicker1",{pickcallback:loadPage,bannerBackColor:"rgb(0,112,192)",searchEnableUrl:data_enabledate}); 61 var div_rili1=document.getElementById("div1"); 62 div_rili1.appendChild(datepicker1.div); 63 datepicker1.reloadDateList(); 64 65 //设置更多的配置项，被点击的按钮变色，程序可以在一定的范围内根据外围div的大小调整每个按钮的尺寸，另外设置了字体大小，以及允许点击未激活日期 66 var datepicker2=new DatePicker("datepicker2",{ 67 pickcallback:function(str_date,that){ 68 datepicker2.pick0(str_date); 69 loadPage(str_date); 70 },bannerBackColor:"rgb(0,112,192)",width:236,height:166,shadowSize:0,paddingSize:0, 71 searchEnableUrl:data_enabledate,contentFontSize:9,flag_canPickUnEnabled:true, 72 }); 73 var div_rili2=document.getElementById("div2"); 74 div_rili2.appendChild(datepicker2.div); 75 datepicker2.reloadDateList(); 76 77 function loadPage(str_date){ 78 79 alert("点击的日期是"+str_date); 80 } 81 82 //常用的起始日期和结束日期，这里设置了每个日历的title，不区分激活按钮，并且把日历的值与span的innerHTML关联起来（使用arr_valuelink属性可以关联input或textview的value） 83 var divs=div_rilis.getElementsByClassName('div_rili'); 84 var spans=div_rilis.getElementsByClassName("span_rq"); 85 var datepicker1b=new DatePicker("datepicker1b",{pickcallback:function(value,that){ 86 var divs=div_rilis.getElementsByClassName('div_rili'); 87 divs[0].style.display='none'; 88 divs[1].style.display='none'; 89 DatePicker.linkValue(value,that) 90 },bannerBackColor:"rgb(0,112,192)",arr_innerlink:[spans[0]],title:"开始日期"});//与react不同这里的spans在onload后不会再重新生成，所以可以直接关联dom对象！！ 91 var datepicker2b=new DatePicker("datepicker2b",{pickcallback:function(value,that){ 92 var divs=div_rilis.getElementsByClassName('div_rili'); 93 divs[0].style.display='none'; 94 divs[1].style.display='none'; 95 DatePicker.linkValue(value,that) 96 },bannerBackColor:"rgb(0,112,192)",arr_innerlink:[spans[1]],title:"结束日期"}); 97 divs[0].appendChild(datepicker1b.div); 98 divs[1].appendChild(datepicker2b.div); 99 datepicker1b.reloadDateList(); 100 datepicker2b.reloadDateList(); 101 </script> 102 </html>
日历按钮图片：
代码实现：（建议从后往前看）
1 DatePicker=function(id,obj_p) 2 { 3 //如果已经有这个div则建立失败 4 var div=document.getElementById("id"); 5 if(div) 6 { 7 console.log("组件id重复，请使用其他组件id"); 8 return; 9 } 10 div=document.createElement("div");//最外层容器 11 this.id=id; 12 this.div=div; 13 div.id=id; 14 var _this=this; 15 16 this.width=obj_p.width||256; 17 this.height=obj_p.height||202; 18 this.shadowSize=obj_p.shadowSize||4; 19 this.shadowColor=obj_p.shadowColor||"rgb(203,203,203)"; 20 this.backColor=obj_p.backColor||"white"; 21 //this.boxShadow=obj_p.boxShadow||"inset 0 0 4px 4px rgb(203,203,203)"; 22 div.style.border="0px"; 23 div.style.width=this.width+"px"; 24 div.style.height=this.height+"px"; 25 div.style.boxShadow="inset 0 0 "+this.shadowSize+"px "+this.shadowSize+"px "+this.shadowColor; 26 div.style.position="absolute"; 27 div.style.backgroundColor=this.backColor; 28 29 this.title=obj_p.title||"日期选择"; 30 //this.noTitle=obj.noTitle||false; 31 //this.noBanner=obj.noBanner||false; 32 this.h1=obj_p.h1||24;//最上面的一行空间 33 this.h2=obj_p.h2||24; 34 //this.h3=obj_p.h3||208; 35 this.titleFontSize=obj_p.titleFontSize||12; 36 this.contentFontSize=obj_p.contentFontSize||10; 37 var span=document.createElement("span")//日历的标题栏 38 span.innerText=this.title; 39 span.style.height=this.h1+"px"; 40 span.style.fontSize=this.titleFontSize+"px"; 41 span.style.fontWeight="bold"; 42 span.style.lineHeight=this.h1+"px"; 43 span.style.display="inline-block"; 44 span.style.left=this.shadowSize+"px"; 45 span.style.paddingLeft=this.shadowSize+"px"; 46 span.style.position="absolute"; 47 span.style.zIndex="2"; 48 div.appendChild(span); 49 50 this.bannerBackColor=obj_p.bannerBackColor||"rgb(169,16,10)"; 51 this.bannerFontColor=obj_p.bannerFontColor||"white"; 52 this.date=obj_p.date||(new Date());//默认日期 53 this.year=this.date.getFullYear(); 54 this.month=this.date.getMonth(); 55 this.day31=this.date.getDate(); 56 this.day7=this.date.getDay(); 57 this.arr_day7=obj_p.arr_day7||["","一","二","三","四","五","六","日"]; 58 this.arr_bannerp=obj_p.arr_bannerp||([//用来调整年月的按钮 59 {id:"btn1",width:10,marginLeft:20,text:"《",onclick:function(){_this.year-=10;_this.changeYear()}} 60 ,{id:"btn2",width:10,marginLeft:5,text:"〈",onclick:function(){_this.year-=1;_this.changeYear()}} 61 ,{id:"btn3",width:40,marginLeft:5,text:this.year,onclick:function(){}} 62 ,{id:"btn4",width:10,marginLeft:5,text:"〉",onclick:function(){_this.year+=1;_this.changeYear()}} 63 ,{id:"btn5",width:10,marginLeft:5,text:"》",onclick:function(){_this.year+=10;_this.changeYear()}} 64 ,{id:"btn6",width:10,marginLeft:50,text:"〈",onclick:function(){_this.month-=1;if(_this.month<0){_this.month=11;_this.year-=1;}_this.changeMonth();_this.changeYear()}} 65 ,{id:"btn7",width:20,marginLeft:5,text:this.month+1,onclick:function(){}} 66 ,{id:"btn8",width:10,marginLeft:5,text:"〉",onclick:function(){_this.month+=1;if(_this.month>11){_this.month=0;_this.year+=1;}_this.changeMonth();_this.changeYear()}} 67 ]) 68 69 var div_banner=document.createElement("div"); 70 div_banner.style.height=this.h2+"px"; 71 //div_banner.style.width="100%"; 72 div_banner.style.left=this.shadowSize+"px"; 73 div_banner.style.right=this.shadowSize+"px"; 74 div_banner.style.top=this.h1+"px"; 75 div_banner.style.position="absolute"; 76 div_banner.style.backgroundColor=this.bannerBackColor; 77 div_banner.style.lineHeight=this.h2+"px"; 78 div_banner.style.zIndex="2"; 79 //div_banner.style.fontSize=this.contentFontSize+2+"px"; 80 //div_banner.style.color=this.bannerFontColor; 81 //div_banner.style.fontWeight="bold"; 82 83 //this.changeYearBack=obj_p. 84 85 var len=this.arr_bannerp.length; 86 var sum_left=0; 87 for(var i=0;i<len;i++)//banner上调整年月的按钮 88 { 89 var bannerp=this.arr_bannerp[i]; 90 var btn=document.createElement("button"); 91 btn.id=bannerp.id; 92 btn.style.position="absolute"; 93 btn.style.backgroundColor=this.bannerBackColor; 94 btn.style.border="0px"; 95 btn.style.padding="0px"; 96 btn.style.textAlign="center"; 97 btn.style.color=this.bannerFontColor;//button这个属性并不会自动继承 98 btn.style.fontWeight="bold"; 99 btn.style.fontSize=this.contentFontSize+2+"px"; 100 btn.style.height="100%"; 101 btn.style.lineHeight=this.h2+"px"; 102 btn.style.width=bannerp.width+"px"; 103 btn.style.left=sum_left+bannerp.marginLeft+"px"; 104 btn.innerText=bannerp.text; 105 btn.onclick=bannerp.onclick; 106 sum_left+=(bannerp.width+bannerp.marginLeft); 107 this[btn.id]=btn; 108 div_banner.appendChild(btn); 109 } 110 div.appendChild(div_banner); 111 this.paddingSize=obj_p.paddingSize||6; 112 113 this.gridBackColor=obj_p.gridBackColor||"#eeeeee";//单元格背景颜色 114 this.gridColor=obj_p.gridColor||"#000000";//本月单元格的文字颜色 115 this.gridColor0=obj_p.gridColor0||"#888888";//连带显示的非本月单元格的文字颜色 116 this.hoverBorderColor=obj_p.hoverBorderColor||"#888888";//鼠标移入可选单元格后的边框颜色 117 this.enableBackColor=obj_p.enableBackColor||"rgb(207,232,252)";//可以被选择的单元格的背景颜色 118 this.enableBackColorPicked=obj_p.enableBackColorPicked||"rgb(252,232,207)"; 119 var div_list=document.createElement("div");//按钮容器 120 var int1=this.shadowSize+this.paddingSize; 121 div_list.style.left=int1+"px"; 122 div_list.style.right=int1+"px"; 123 div_list.style.top=int1+"px"; 124 div_list.style.bottom=this.shadowSize+"px"; 125 div_list.style.position="absolute"; 126 div_list.style.backgroundColor=this.gridBackColor; 127 div.appendChild(div_list); 128 this.sizex=Math.floor((this.width-int1*2)/7);//按钮尺寸 129 this.sizey=Math.floor((this.height-int1-this.shadowSize-(this.h1+this.h2-this.shadowSize-this.paddingSize))/7); 130 this.pickcallback=obj_p.pickcallback;//鼠标点击日期按钮之后的响应方法 131 this.div_list=div_list; 132 this.obj_enable={}; 133 this.searchEnableUrl=obj_p.searchEnableUrl;//||apiHost+"/public/searchEnableDate"; 134 this.flag_canPickUnEnabled=obj_p.flag_canPickUnEnabled||false;//是否可以点击不激活的按钮 135 if(!this.searchEnableUrl)//根本不区分按钮是否激活 136 { 137 this.flag_canPickUnEnabled=true; 138 } 139 //this.reloadDateList(obj_p.initcallback); 140 //将日历的选择值与某些dom对象关联起来 141 this.arr_innerlink=obj_p.arr_innerlink||[]; 142 this.arr_valuelink=obj_p.arr_valuelink||[]; 143 } 144 DatePicker.linkValue=function(value,that)//改变与日历相关联的dom对象的值 145 { 146 var len=that.arr_innerlink.length; 147 for(var i=0;i<len;i++) 148 { 149 that.arr_innerlink[i].innerHTML=value; 150 } 151 var len=that.arr_valuelink.length; 152 for(var i=0;i<len;i++) 153 { 154 that.arr_valuelink[i].value=value; 155 } 156 } 157 DatePicker.prototype.changeYear=function() 158 { 159 this.btn3.innerText=this.year; 160 this.reloadDateList();//根据当前月份重新排列日期btn 161 console.log("改变了年份") 162 } 163 DatePicker.prototype.changeMonth=function() 164 { 165 this.btn7.innerText=this.month+1; 166 console.log("改变了月份") 167 } 168 DatePicker.DrawButton=function(that,callback) 169 {//重新渲染选中月份的日历按钮 170 try { 171 172 var sizex = that.sizex;//每个小块的宽度 173 var sizey = that.sizey;//每个小块的宽度 174 var date_list = new Date(that.year + "-" + (that.month + 1) + "-1");//取这个月的第一天 175 var day7_list = date_list.getDay();//是周几 176 //上一个月有几天？ 177 var date_list0 = date_list - 1000 * 60 * 60;//上个月的最后一天 178 var day31_list0 = (new Date(date_list0)).getDate();//是几号 179 180 var int3 = that.month + 2; 181 var int4 = that.year; 182 if (int3 > 12) { 183 int3 = 1; 184 int4++; 185 } 186 var date_list2 = new Date(int4 + "-" + (int3) + "-1");//取下个月的第一天 187 var date_list1 = date_list2 - 1000 * 60 * 60;//这个月的最后一天 188 var day31_list1 = (new Date(date_list1)).getDate();//是几号 189 for (var i = 0; i < (day7_list - 1); i++) {//补齐日历第一行的灰色部分 190 that.arr_date.push({text: day31_list0 - (day7_list - 2 - i), inmonth: false}) 191 } 192 if(that.searchEnableUrl)//如果要区分按钮是否激活 193 { 194 var list_enabledate = that.obj_json.list_enabledate; 195 for (var i = 1; i <= day31_list1; i++) { 196 var len = list_enabledate.length; 197 var str_fulldate = that.year + (that.month + 1 + 100 + "").substr(1) + (i + 100 + "").substr(1); 198 var obj = {text: i, inmonth: true, isenable: false, str_fulldate: str_fulldate}; 199 for (var j = 0; j < len; j++) { 200 if (list_enabledate[j].CBRQ == (str_fulldate)) { 201 obj.isenable = true; 202 //obj.str_fulldate=str_fulldate; 203 break; 204 } 205 } 206 that.arr_date.push(obj); 207 } 208 } 209 else { 210 for (var i = 1; i <= day31_list1; i++) { 211 var str_fulldate = that.year + (that.month + 1 + 100 + "").substr(1) + (i + 100 + "").substr(1); 212 var obj = {text: i, inmonth: true, isenable: false, str_fulldate: str_fulldate}; 213 //obj.isenable = true;<-在不区分是否激活的情况下，不需要变色标记 214 that.arr_date.push(obj); 215 } 216 }//将本月内的日期对象推入 217 218 var len = that.arr_date.length; 219 for (i = 0; i < (42 - len); i++) {//补上本月剩余的灰色部分 220 that.arr_date.push({text: i + 1, inmonth: false}) 221 } 222 //开始绘制按钮 223 var int2 = that.h1 + that.h2 - that.shadowSize - that.paddingSize; 224 for (var i = 0; i < 7; i++)//对于每一行 225 { 226 for (var j = 0; j < 7; j++) { 227 228 (function () {//这里需要用闭包避免var变量污染 229 var div = document.createElement("div"); 230 div.class = "div_riligrid"; 231 //div.className="div_riligrid"; 232 div.style.position = "absolute"; 233 div.style.display = "inline-block"; 234 div.style.top = i * sizey + int2 + "px"; 235 div.style.left = j * sizex + "px"; 236 div.style.width = sizex + "px"; 237 div.style.height = sizey + "px"; 238 239 //div.style.borderWidth="0px" 240 //div.style.borderColor=that.hoverBorderColor 241 div.style.textAlign = "center"; 242 243 244 if (i == 0)//第一行显示一周七天的名字，按中式习惯从周一到周日显示 245 { 246 div.style.color = that.gridColor; 247 div.innerText = that.arr_day7[j + 1]; 248 div.style.fontSize = that.contentFontSize + "px"; 249 div.style.cursor = "default"; 250 } 251 else//接下来根据列表生成日期小块 252 { 253 div.style.fontSize = that.contentFontSize + 4 + "px"; 254 div.style.cursor = "pointer"; 255 var index = (i - 1) * 7 + j; 256 (function () { 257 var obj = that.arr_date[index]; 258 div.innerText = obj.text; 259 if (!obj.inmonth) {//对于不在本月内的占位按钮 260 div.style.color = that.gridColor0; 261 } 262 else//根据条件判断按钮是否可点击 263 { 264 div.style.color = that.gridColor; 265 //obj.isEnabled=false; 266 //div.style.borderWidth 267 /*div.onclick=function(){ 268 that.pickcallback(obj.text) 269 }*/ 270 div.style.top = i * sizey + int2 + 1 + "px"; 271 div.style.left = j * sizex + 1 + "px"; 272 div.style.width = sizex - 2 + "px"; 273 div.style.height = sizey - 2 + "px"; 274 if (obj.isenable == true || that.flag_canPickUnEnabled) { 275 div.onclick = function () { 276 //obj.isenable 277 that.pickcallback(obj.str_fulldate,that) 278 } 279 } 280 281 //div.style.border="1px solid "+that.hoverBorderColor; 282 //鼠标移入移出事件 283 div.onpointerenter = function () {//鼠标移入时显示边框 284 div.style.border = "1px solid " + that.hoverBorderColor; 285 } 286 div.onpointerleave = function () { 287 div.style.border = "0px" 288 } 289 that.obj_enable["div_" + obj.str_fulldate] = div; 290 if (obj.isenable) { 291 div.style.backgroundColor = that.enableBackColor; 292 293 } 294 } 295 })() 296 //事件 297 } 298 that.div_list.appendChild(div); 299 })() 300 } 301 } 302 that.inited=true; 303 if (that.true_cbrq) { 304 that.pick(that.true_cbrq); 305 } 306 if (callback) { 307 callback(); 308 } 309 }catch(e) 310 { 311 alert(e); 312 console.log(e); 313 } 314 } 315 DatePicker.prototype.reloadDateList=function(callback) 316 {//重新渲染当前月份日历按钮前，从后台查询本月激活按钮 317 console.log("重新加载日期列表")//7*6标准 318 this.arr_date=[]; 319 this.obj_enable={}; 320 this.div_list.innerHTML=""; 321 var that=this; 322 //有可能不需要后台查询！ 323 if(this.searchEnableUrl) 324 { 325 if(typeof searchEnableUrl=="string") {//如果url是字符串 326 327 328 //先绘制标签还是先查询标签限制？ 329 var ajax = createXMLHttpRequest(); 330 ajax.open("POST", this.searchEnableUrl); 331 ajax.onreadystatechange = function () {//这里取到的this时ajax对象！ 332 if (ajax.readyState == 4) { 333 334 if (ajax.status == 200) { 335 var str_json = ajax.responseText; 336 try { 337 var obj_json = JSON.parse(str_json); 338 if (obj_json.type == "ok") { 339 that.obj_json = obj_json; 340 DatePicker.DrawButton(that, callback); 341 342 } 343 else if (obj_json.type == "error") { 344 alert(obj_json.str_res); 345 console.log(obj_json.str_res); 346 } 347 } 348 catch (e) { 349 alert(e); 350 console.log(e); 351 } 352 ajax.abort(); 353 } 354 } 355 } 356 357 //var obj_json={ str_month:this.year+(this.month+1+100+"").substr(1)} 358 //ajax.send(JSON.stringify(obj_json));//总之sb2的servlet不能自动转化json和FormData 359 var formData = new FormData() 360 formData.append("str_month", this.year + (this.month + 1 + 100 + "").substr(1)); 361 ajax.send(formData); 362 // 363 } 364 else { 365 that.obj_json = this.searchEnableUrl;//不去后端查询，直接把searchEnableUrl作为所需数据 366 DatePicker.DrawButton(that, callback); 367 } 368 } 369 else { 370 DatePicker.DrawButton(that,callback); 371 } 372 373 } 374 DatePicker.prototype.pick0=function(true_cbrq)//通过代码设置被选中按钮， 375 {//如果被选中按钮在另一个月，则日历会自动跳转到相应月份，并且改变被选中按钮的颜色 376 var year=parseInt(true_cbrq.substr(0,4)); 377 var month=parseInt(true_cbrq.substr(4,2)); 378 var day31=true_cbrq.substr(6,2); 379 this.true_cbrq=true_cbrq; 380 if(this.year!=year||(this.month+1)!=month) 381 { 382 this.year=year; 383 this.month=month-1; 384 this.true_cbrq=true_cbrq; 385 this.changeMonth(); 386 this.changeYear(); 387 //this.reloadDateList() 388 389 } 390 else 391 { 392 if(this.inited) 393 { 394 this.pick(true_cbrq) 395 } 396 else { 397 this.reloadDateList(); 398 } 399 } 400 } 401 DatePicker.prototype.pick=function(true_cbrq)//修改被点击按钮的颜色 402 { 403 if(this.grid_picked) 404 { 405 this.grid_picked.style.backgroundColor=this.enableBackColor; 406 407 } 408 var grid=this.obj_enable["div_"+true_cbrq]; 409 if(grid) 410 { 411 grid.style.backgroundColor=this.enableBackColorPicked; 412 this.grid_picked=grid; 413 } 414 } 415 DatePicker.getDateStr=function(dt)//以下是一些辅助方法 416 { 417 var arr_day=["","一","二","三","四","五","六","日"]; 418 var str_date=dt.getFullYear()+"年"+(dt.getMonth()+1)+"月"+dt.getDate()+"日 星期"+arr_day[dt.getDay()]; 419 return str_date; 420 } 421 DatePicker.getDateStr2=function(dt)//标准八位日期 422 { 423 var str_date2=dt.getFullYear()+(dt.getMonth()+1+100+"").substr(1)+(dt.getDate()+100+"").substr(1); 424 return str_date2; 425 } 426 //八位纯数字日期加两个杠，变成十位标准日期 427 DatePicker.addGang=function(str) 428 { 429 var str_res=str.substr(0,4)+"-"+str.substr(4,2)+"-"+str.substr(6,2); 430 return str_res; 431 } 432 //八位纯数字日期加上汉字年月日，并且去掉补位的0 433 DatePicker.addNYR=function(str) 434 { 435 var str_res=str.substr(0,4)+"年"+parseInt(str.substr(4,2))+"月"+parseInt(str.substr(6,2))+"日"; 436 return str_res; 437 }
github地址：https://github.com/ljzc002/SimpleAni
