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jquery - 在下拉菜单中单击时上升选中的单选按钮

问题描述

我创建了一个下拉菜单来更改货币。我有一个使用 JQuery 的模型，但结构并不完全相同。

问题是当我点击它时，我希望div带有选中输入的 成为第一个，就像在这个例子中一样：

我怎样才能做到这一点 ？

$('.maincar__currency').click(function(e) {
  e.preventDefault();
  e.stopPropagation();
  $(this).toggleClass('expanded');
});

$(".maincar__currency label").click(function() {
  $('#' + $(this).attr('for')).prop('checked', true);
});

$(document).click(function() {
  $('.maincar__currency').removeClass('expanded');
});
.maincar__currency {
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 32px;
  max-height: 32px;
  margin-left: auto;
  margin-bottom: 10px;
  overflow: hidden;
  border-radius: 6px;
  box-sizing: border-box;
  box-shadow: $shadowBox;
  font-size: 14px;
  font-weight: 500;
}

.maincar__currency label {
  display: flex;
  width: 80px;
  height: 32px;
  padding-top: 6px;
  padding-bottom: 6px;
  padding-left: 8px;
  margin-right: 0 auto;
  background-color: #fff;
  text-align: center;
  color: $mediumMainGrey;
  cursor: pointer;
  //box-sizing: border-box;
}

.maincar__currency label:hover {
  background-color: $extraLightGrey;
}

.currency {
  display: flex;
  width: 100%;
}

.currency input {
  display: none;
}

.currency img {
  //object-fit: contain;
  height: 20px;
  width: auto;
  margin-right: 6px;
}

.currency span {
  display: flex;
  //align-items: center;
  color: $mediumMainGrey;
  text-decoration: none;
}

.expanded {
  max-height: 128px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="maincar__currency">
  <label for="euro-radio-is">
    <div class="currency currency__euro">
      <img src="/assets/images/icons/euro.png" alt="Euro sign">
      <input type="radio" name="currency-is" value="euro" id="euro-radio-is" class="euro_radio_is" checked="true">
      <span class="default">EUR</span>
    </div>
  </label>
  <label for="dollar-radio-is">
    <div class="currency currency__dollar">
      <img src="/assets/images/icons/dollar.png" alt="Dollar sign">
      <input type="radio" name="currency-is" id="dollar-radio-is" class="dollar_radio_is" value="dollar">
      <span>USD</span>
    </div>
  </label>
  <label for="gbp-radio-is">
    <div class="currency currency__pound">
      <img src="/assets/images/icons/pound-sterling.png" alt="Pound sign">
      <input type="radio" name="currency-is" id="gbp-radio-is" class="gbp_radio_is" value="gbp">
      <span>GBP</span>
    </div>
  </label>
  <label for="chf-radio-is">
    <div class="currency currency__chf">
      <img src="/assets/images/icons/swiss-franc.png" alt="Swiss franc sign">
      <input type="radio" name="currency-is" id="chf-radio-is" class="chf_radio_is" value="chf">
      <span>CHF</span>
    </div>
  </label>
</div>

https://codepen.io/j0be/pen/jWGVvV

标签： jqueryhtmlcss

解决方案

您只需将单击的标签添加到容器中，它就会将其移动到顶部：

var $container = $('.maincar__currency'); // cache this for better performance as you use it multiple times

$container.click(function(e) {
  e.preventDefault();
  e.stopPropagation();
  $(this).toggleClass('expanded');
});

$(".maincar__currency label").click(function() {
  $('#' + $(this).attr('for')).prop('checked', true); 
  // just prepend this label to the container and it will move it to the top:
  
  $container.prepend($(this));
});

$(document).click(function() {
  $container.removeClass('expanded');
});
.maincar__currency {
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 32px;
  max-height: 32px;
  margin-left: auto;
  margin-bottom: 10px;
  overflow: hidden;
  border-radius: 6px;
  box-sizing: border-box;
  box-shadow: $shadowBox;
  font-size: 14px;
  font-weight: 500;
}

.maincar__currency label {
  display: flex;
  width: 80px;
  height: 32px;
  padding-top: 6px;
  padding-bottom: 6px;
  padding-left: 8px;
  margin-right: 0 auto;
  background-color: #fff;
  text-align: center;
  color: $mediumMainGrey;
  cursor: pointer;
  //box-sizing: border-box;
}

.maincar__currency label:hover {
  background-color: $extraLightGrey;
}

.currency {
  display: flex;
  width: 100%;
}

.currency input {
  display: none;
}

.currency img {
  //object-fit: contain;
  height: 20px;
  width: auto;
  margin-right: 6px;
}

.currency span {
  display: flex;
  //align-items: center;
  color: $mediumMainGrey;
  text-decoration: none;
}

.expanded {
  max-height: 128px;
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="maincar__currency">
  <label for="euro-radio-is">
    <div class="currency currency__euro">
      <img src="/assets/images/icons/euro.png" alt="Euro sign">
      <input type="radio" name="currency-is" value="euro" id="euro-radio-is" class="euro_radio_is" checked="true">
      <span class="default">EUR</span>
    </div>
  </label>
  <label for="dollar-radio-is">
    <div class="currency currency__dollar">
      <img src="/assets/images/icons/dollar.png" alt="Dollar sign">
      <input type="radio" name="currency-is" id="dollar-radio-is" class="dollar_radio_is" value="dollar">
      <span>USD</span>
    </div>
  </label>
  <label for="gbp-radio-is">
    <div class="currency currency__pound">
      <img src="/assets/images/icons/pound-sterling.png" alt="Pound sign">
      <input type="radio" name="currency-is" id="gbp-radio-is" class="gbp_radio_is" value="gbp">
      <span>GBP</span>
    </div>
  </label>
  <label for="chf-radio-is">
    <div class="currency currency__chf">
      <img src="/assets/images/icons/swiss-franc.png" alt="Swiss franc sign">
      <input type="radio" name="currency-is" id="chf-radio-is" class="chf_radio_is" value="chf">
      <span>CHF</span>
    </div>
  </label>
</div>

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