我正在学习
Jquery.我想了解所选的选项.
所以当用户选择一个选项时,我可以做点什么.
我试图运行Jquery,以便当用户选择customAmountSelected时,它应该将一个类’xxx’添加到customAmountinput
$(document).ready(function() {
if ($("#amountSelected:selected").val() == 'customAmountSelected') {
$('.customAmountinput').addClass('xxx');
}
});
.displaynone {
display: none;
}
<div>
<div class="form-group">
<label>Budget (£)</label>
<select class="form-control" id="amountSelected">
<option selected="selected">No budget</option>
<option value="5">£5</option>
<option value="30">£10</option>
<option value="20">£20</option>
<option value="50">£50</option>
<option value="100">£100</option>
<option value="customAmountSelected">Custom</option>
</select>
<p class="small"><em>Need some text here to explain why they can edit budget </em>
</p>
</div>
<!-- appear when user selected custom budget -->
<div class="form-group displaynone customAmountinput">
<label>Enter ammount</label>
<input class="form-control" placeholder="£">
</div>
<div class="form-group">
<div class="checkbox">
<label>
<input type="checkbox" value checked>Post to wall?
</label>
</div>
</div>
</div>
最佳答案 您正在处理价值,因此您无需验证“已选择”状态.
您必须侦听事件“change”,并且它必须位于$(document).ready()内,这种事件在窗口/ DOM加载中绑定.
尝试这样的事情:
$(document).ready(function() {
$("#amountSelected").change(function(){
if($(this).val() == 'customAmountSelected'){
$('.customAmountinput').addClass('xxx');
}
});
});