從月份下拉選項中顯示當前月份的 DIV

Question

我有幾個月的時間（一月到十二月）。 選擇月份時，它將顯示該月份的 DIV。 默認情況下，將顯示當前月份和相應的 DIV 。

到目前為止，我可以默認在下拉菜單中顯示當前月份，但我不知道為什么沒有顯示相應的DIV。

Furthermore, when January is selected, the DIV displays, but then does not go away when another month is selected. 這只適用於 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/

謝謝！

Answer 1

我想你真的很親近。 看看下面的代碼。 我修改了一些東西。

特別var i = 0; 以及初始顯示。

 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

你沒有顯示當月的內容，看看這個可能對你有幫助。

 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

我對你的 js 代碼做了一些改動，試試這個

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';
};

它將解決問題。