基于下拉选择隐藏/显示内容

Question

在这个特定示例中，我如何根据下拉选择来更改内容？

以下是我尝试过的：

<select class="selection-of-areas" id="selection-of-area" onchange="changeFunc();">
<option value="illinois">Illinois</option>
<option value="florida">Florida</option>
</select>
</div>
<div class="members-row illinois-members">
Test Illinois
</div>
<div class="members-row florida-members">
Test Florida
</div>

还有js。。。

function changeFunc() {
var selectBox = document.getElementById("selection-of-area");
var selectedValue = selectBox.options[selectBox.selectedIndex].value;
}

(function($) {
$('.select-button').click(function(e) {
e.preventDefault();
var $this = $(this),
$targetRow = $this.data('target'),
$activeClassText = 'active';
$('.select-button').removeClass($activeClassText);
$this.addClass($activeClassText);
$('.members-row').removeClass($activeClassText);
$('.' + $targetRow + '-members').addClass($activeClassText);
});
})(jQuery)

和CSS：

.selection-of-areas {
width: 100%;
font-family: 'Josefin Sans';
font-size: 18px;
background: #eee;
padding: 11px 9px 8px;
box-shadow: 0 0 3px rgba(120,120,120,.5);
}
.select-area-selection {
display: block;
}
.members-row.active {
display: block;
}
.members-row {
display: none;
}

我在这里创建了一个代码笔：https://codepen.io/gpercifield/pen/MWyKYeG

它似乎根本就不着火。谢谢你为我指明了正确的方向。

Answer 1

您可以使用这样的东西：

$('.members-row').hide();
$('.' + selectedValue +'-members').show();

如果你想在javascript:中

var hideele = document.querySelectorAll('.members-row');
for (var i = 0; i < hideele.length; i++) {
hideele[i].style.display = 'none';
}
document.querySelectorAll('.' + selectedValue + '-members')[0].style.display = 'block';

演示

function changeFunc() {
var selectBox = document.getElementById("selection-of-area");
var selectedValue = selectBox.options[selectBox.selectedIndex].value;
$('.members-row').hide();
$('.' + selectedValue +'-members').show();
}

.selection-of-areas {
width: 100%;
font-family: 'Josefin Sans';
font-size: 18px;
background: #eee;
padding: 11px 9px 8px;
box-shadow: 0 0 3px rgba(120, 120, 120, .5);
}
.select-area-selection {
display: block;
}
.members-row.active {
display: block;
}
.members-row {
display: none;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select class="selection-of-areas" id="selection-of-area" onchange="changeFunc();">
<option value="illinois">Illinois</option>
<option value="florida">Florida</option>
</select>

<div class="members-row illinois-members">
Test Illinois
</div>
<div class="members-row florida-members">
Test Florida
</div>

Answer 2

您只需要一个可以在更改下拉菜单时触发的函数。

function changeFunc(event) {
var selectBox = document.getElementById("selection-of-area");
var selectedValue = selectBox.options[selectBox.selectedIndex].value;console.log(selectedValue)

// get the value
var activeClassText = 'active';
$('.members-row').removeClass(activeClassText); // hide others
$("."+selectedValue+'-members').addClass(activeClassText); // show only which is selected
}