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我遇到了一個問題,即我的第二個事件偵聽器似乎沒有正常執行。我正在尋找更新我的div中的文字,從下拉列表中選擇每個選項,但文字只會在第一次更改時發生變化。之後,儘管下拉菜單正確觸發,但文字在任何時候都不會隨任何更改而更新。我覺得它一定是選擇器的問題,但我不是100%肯定的,我對Jquery很新。我在下面附上小提琴來展示我的問題。任何幫助是極大的讚賞。 https://jsfiddle.net/042swvdx/4/Jquery第二次更改未觸發
HTML:
<h1 style='text-align:center;'>Accu Tab Submittal Builder</h1>
<br>
<div style='text-align:center;'>
<div id='descrip'>
<p>Please select a chlorinator model</p>
</div>
<form id='first'>
<select>
<option selected disabled>Chlorinator Models</option>
<option value='Accu-tab 2075'>Accu-Tab 2075</option>
<option value='Accu-tab 2150'>Accu-Tab 2150</option>
<option value='Accu-tab 2300'>Accu-Tab 2300</option>
<option value='Accu-tab 2600'>Accu-Tab 2600</option>
<option value='POWER PRO 3075'>3075 Power Pro</option>
<option value='POWER PRO 3150'>3150 Power Pro</option>
<option value='POWER PRO 3530'>3530 Power Pro</option>
<option value='POWER PRO 30600'>30600 Power Pro</option>
<option value='POWER PRO 361000'>361000 Power Pro</option>
<option value='POWER PRO 481200'>481200 Power Pro</option>
</select>
<select id='second' style="display:none;">
<option selected disabled>Select Flow</option>
<option value='Gravity'>Gravity</option>
<option value='Standard'>Standard</option>
</select>
<select id='third' style='display: none;'>
<option value='1 PH'>1 Phase</option>
<option value='3 PH'>3 Phase</option>
</select>
<select id='fourth' style="display:none;">
<option disabled selected>Control Type</option>
<option>No Control</option>
<option>WEG</option>
<option>VFD</option>
</select>
<button style='display: none'>Submit</button>
JQUERY:
$("#first").change(function() {
$("#descrip").html("<p>Please select the flow type for this system.</p>");
$("#second").show();
});
$("#second").change(function() {
$("#descrip").html('<p>Please select the phase of the motor for this unit.</p>');
$("#third").show();
});
$("#third").change(function() {
$("#descrip").html("<p>Please select units control type.</p>");
$("#fourth").show();
});
$("#fourth").change(function() {
$("#descrip").html("");
$("button").show();
});