从月份下拉选项中显示当前月份的 DIV

Question

我有几个月的时间（一月到十二月）。 选择月份时，它将显示该月份的 DIV。 默认情况下，将显示当前月份和相应的 DIV 。

到目前为止，我可以默认在下拉菜单中显示当前月份，但我不知道为什么没有显示相应的DIV。

Furthermore, when January is selected, the DIV displays, but then does not go away when another month is selected. 这只适用于 1 月份。

HTML

<select name="month" id="month">
  <option value="0">January</option>
  <option value="1">February</option>
  <option value="2">March</option>
  <option value="3">April</option>
  <option value="4">May</option>
  <option value="5">June</option>
  <option value="6">July</option>
  <option value="7">August</option>
  <option value="8">September</option>
  <option value="9">October</option>
  <option value="10">November</option>
  <option value="11">December</option>
</select>

<div class="hide" id="0">Jan content</div>
<div class="hide" id="1">Feb content</div>
<div class="hide" id="2">Mar content</div>
<div class="hide" id="3">Apr content</div>
<div class="hide" id="4">May content</div>
<div class="hide" id="5">Jun content</div>
<div class="hide" id="6">Jul content</div>
<div class="hide" id="7">Aug content</div>
<div class="hide" id="8">Sept content</div>
<div class="hide" id="9">Oct content</div>
<div class="hide" id="10">Nov content</div>
<div class="hide" id="11">Dec content</div>

CSS

.hide {
    display: none;   
}  

JavaScript + jQuery

var CurrentDate=new Date();
$("#month").val(CurrentDate.getMonth());

document.getElementById('month').onchange = function() {
    var i = 1;
    var myDiv = document.getElementById(i);
    while(myDiv) {
        myDiv.style.display = 'none';
        myDiv = document.getElementById(++i);
    }
    document.getElementById(this.value).style.display = 'block';
};

演示： https://jsfiddle.net/mp61hbno/

谢谢！

Answer 1

我想你真的很亲近。 看看下面的代码。 我修改了一些东西。

特别var i = 0; 以及初始显示。

 var CurrentDate=new Date(); $("#month").val(CurrentDate.getMonth()); document.getElementById(new Date().getMonth()).style.display = 'block'; document.getElementById('month').onchange = function() { var i = 0; var myDiv = document.getElementById(i); while(myDiv) { myDiv.style.display = 'none'; myDiv = document.getElementById(++i); } document.getElementById(this.value).style.display = 'block'; };

 .hide { display: none; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <select name="month" id="month"> <option value="0">January</option> <option value="1">February</option> <option value="2">March</option> <option value="3">April</option> <option value="4">May</option> <option value="5">June</option> <option value="6">July</option> <option value="7">August</option> <option value="8">September</option> <option value="9">October</option> <option value="10">November</option> <option value="11">December</option> </select> <div class="hide" id="0">Jan content</div> <div class="hide" id="1">Feb content</div> <div class="hide" id="2">Mar content</div> <div class="hide" id="3">Apr content</div> <div class="hide" id="4">May content</div> <div class="hide" id="5">Jun content</div> <div class="hide" id="6">Jul content</div> <div class="hide" id="7">Aug content</div> <div class="hide" id="8">Sept content</div> <div class="hide" id="9">Oct content</div> <div class="hide" id="10">Nov content</div> <div class="hide" id="11">Dec content</div>

Answer 2

你没有显示当月的内容，看看这个可能对你有帮助。

 var CurrentDate=new Date(); var curMonth = CurrentDate.getMonth(); document.getElementById(curMonth).style.display = 'block'; $("#month").val(CurrentDate.getMonth()); document.getElementById('month').onchange = function() { var i = 1; var myDiv = document.getElementById(i); while(myDiv) { myDiv.style.display = 'none'; myDiv = document.getElementById(++i); } document.getElementById(this.value).style.display = 'block'; };

 .hide { display: none; }

 <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> <select name="month" id="month"> <option value="0">January</option> <option value="1">February</option> <option value="2">March</option> <option value="3">April</option> <option value="4">May</option> <option value="5">June</option> <option value="6">July</option> <option value="7">August</option> <option value="8">September</option> <option value="9">October</option> <option value="10">November</option> <option value="11">December</option> </select> <div class="hide" id="0">Jan content</div> <div class="hide" id="1">Feb content</div> <div class="hide" id="2">Mar content</div> <div class="hide" id="3">Apr content</div> <div class="hide" id="4">May content</div> <div class="hide" id="5">Jun content</div> <div class="hide" id="6">Jul content</div> <div class="hide" id="7">Aug content</div> <div class="hide" id="8">Sept content</div> <div class="hide" id="9">Oct content</div> <div class="hide" id="10">Nov content</div> <div class="hide" id="11">Dec content</div>

Answer 3

我对你的 js 代码做了一些改动，试试这个

var CurrentDate=new Date();
var curMnth = CurrentDate.getMonth();
$("#month").val(curMnth);
$("#"+curMnth).show();

document.getElementById('month').onchange = function() {
    var i = 0;
    var myDiv = document.getElementById(i);
    while(myDiv) {
        myDiv.style.display = 'none';
        myDiv = document.getElementById(++i);
    }
    document.getElementById(this.value).style.display = 'block';
};

它将解决问题。