尝试添加slideToggle（）函数，但无法正常工作

Question

我有一个自定义样式的选择选项代码，用于选择年份和月份。我想添加jquery slideToggle（）效果。我正在尝试选择自定义定义的类，但是它不起作用。以下是我的代码：

/*
Reference: http://jsfiddle.net/BB3JK/47/
*/

$('select').each(function(){
    var $this = $(this), numberOfOptions = $(this).children('option').length;
  
    $this.addClass('select-hidden'); 
    $this.wrap('<div class="select"></div>');
    $this.after('<div class="select-styled"></div>');

    var $styledSelect = $this.next('div.select-styled');
    $styledSelect.text($this.children('option').eq(0).text());
  
    var $list = $('<ul />', {
        'class': 'select-options'
    }).insertAfter($styledSelect);
  
    for (var i = 0; i < numberOfOptions; i++) {
        $('<li />', {
            text: $this.children('option').eq(i).text(),
            rel: $this.children('option').eq(i).val()
        }).appendTo($list);
    }
  
    var $listItems = $list.children('li');
  
    $styledSelect.click(function(e) {
        e.stopPropagation();
        $('div.select-styled.active').not(this).each(function(){
            $(this).removeClass('active').next('ul.select-options').hide();
        });
        $(this).toggleClass('active').next('ul.select-options').toggle();
    });
  
    $listItems.click(function(e) {
        e.stopPropagation();
        $styledSelect.text($(this).text()).removeClass('active');
        $this.val($(this).attr('rel'));
        $list.hide();
        //console.log($this.val());
    });
  
    $(document).click(function() {
        $styledSelect.removeClass('active');
        $list.hide();
    });

});

//select dropdown slide function
$(document).ready(function(){
  $(".select-styled").click(function(){
    $(".select-options").slideToggle("slow");
  });
});

@import url("https://fonts.googleapis.com/css?family=Lato");
body {
  font-family: Lato, Arial;
  color: #fff;
  padding: 20px;
  background-color: #e74c3c;
}

h1 {
  font-weight: normal;
  font-size: 40px;
  font-weight: normal;
  text-transform: uppercase;
}
h1 span {
  font-size: 13px;
  display: block;
  padding-left: 4px;
}

p {
  margin-top: 200px;
}
p a {
  text-transform: uppercase;
  text-decoration: none;
  display: inline-block;
  color: #fff;
  padding: 5px 10px;
  margin: 0 5px;
  background-color: #b83729;
  -moz-transition: all 0.2s ease-in;
  -o-transition: all 0.2s ease-in;
  -webkit-transition: all 0.2s ease-in;
  transition: all 0.2s ease-in;
}
p a:hover {
  background-color: #ab3326;
}

.select-hidden {
  display: none;
  visibility: hidden;
  padding-right: 10px;
}

.select {
  cursor: pointer;
  display: inline-block;
  position: relative;
  font-size: 16px;
  color: #fff;
  width: 220px;
  height: 40px;
}

.select-styled {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: #c0392b;
  padding: 8px 15px;
  -moz-transition: all 0.2s ease-in;
  -o-transition: all 0.2s ease-in;
  -webkit-transition: all 0.2s ease-in;
  transition: all 0.2s ease-in;
}
.select-styled:after {
  content: "";
  width: 0;
  height: 0;
  border: 7px solid transparent;
  border-color: #fff transparent transparent transparent;
  position: absolute;
  top: 16px;
  right: 10px;
}
.select-styled:hover {
  background-color: #b83729;
}
.select-styled:active, .select-styled.active {
  background-color: #ab3326;
}
.select-styled:active:after, .select-styled.active:after {
  top: 9px;
  border-color: transparent transparent #fff transparent;
}

.select-options {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  z-index: 999;
  margin: 0;
  padding: 0;
  list-style: none;
  background-color: #ab3326;
}
.select-options li {
  margin: 0;
  padding: 12px 0;
  text-indent: 15px;
  border-top: 1px solid #962d22;
  -moz-transition: all 0.15s ease-in;
  -o-transition: all 0.15s ease-in;
  -webkit-transition: all 0.15s ease-in;
  transition: all 0.15s ease-in;
}
.select-options li:hover {
  color: #c0392b;
  background: #fff;
}
.select-options li[rel="hide"] {
  display: none;
}

<div class="dropdown">
<select id="mounth">
    <option value="hide">-- Month --</option>
    <option value="january" rel="icon-temperature">January</option>
    <option value="february">February</option>
    <option value="march">March</option>
    <option value="april">April</option>
    <option value="may">May</option>
    <option value="june">June</option>
    <option value="july">July</option>
    <option value="august">August</option>
    <option value="september">September</option>
    <option value="october">October</option>
    <option value="november">November</option>
    <option value="december">December</option>
</select> 

<select id="year">
    <option value="hide">-- Year --</option>
    <option value="2010">2010</option>
    <option value="2011">2011</option>
    <option value="2012">2012</option>
    <option value="2013">2013</option>
    <option value="2014">2014</option>
    <option value="2015">2015</option>
</select>
</div>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>

在添加了slideToggle（）脚本之后，就以某种方式同时滑动了两个选择菜单，而且滑动的方式也很丑陋（如您在附加的代码段中所见）。请帮助我使slideToggle（）效果完美。

Answer 1

$(".select-options").slideToggle("slow");将同时选择两个下拉菜单。取而代之的是获取clicked元素的下一个元素，然后对其应用slideToggle。

$(this).next().slideToggle("slow");

$('select').each(function() {
  var $this = $(this),
    numberOfOptions = $(this).children('option').length;

  $this.addClass('select-hidden');
  $this.wrap('<div class="select"></div>');
  $this.after('<div class="select-styled"></div>');

  var $styledSelect = $this.next('div.select-styled');
  $styledSelect.text($this.children('option').eq(0).text());

  var $list = $('<ul />', {
    'class': 'select-options'
  }).insertAfter($styledSelect);

  for (var i = 0; i < numberOfOptions; i++) {
    $('<li />', {
      text: $this.children('option').eq(i).text(),
      rel: $this.children('option').eq(i).val()
    }).appendTo($list);
  }

  var $listItems = $list.children('li');

  $styledSelect.click(function(e) {
    e.stopPropagation();
    $('div.select-styled.active').not(this).each(function() {
      $(this).removeClass('active').next('ul.select-options').hide();
    });
    // $(this).toggleClass('active').next('ul.select-options').toggle();
  });

  $listItems.click(function(e) {
    e.stopPropagation();
    $styledSelect.text($(this).text()).removeClass('active');
    $this.val($(this).attr('rel'));
    $list.hide();
    //console.log($this.val());
  });

  $(document).click(function() {
    $styledSelect.removeClass('active');
    $list.hide();
  });

});

//select dropdown slide function
$(document).ready(function() {
  $(".select-styled").click(function() {
    $(this).next().slideToggle("slow");
  });
});

@import url("https://fonts.googleapis.com/css?family=Lato");
body {
  font-family: Lato, Arial;
  color: #fff;
  padding: 20px;
  background-color: #e74c3c;
}

h1 {
  font-weight: normal;
  font-size: 40px;
  font-weight: normal;
  text-transform: uppercase;
}

h1 span {
  font-size: 13px;
  display: block;
  padding-left: 4px;
}

p {
  margin-top: 200px;
}

p a {
  text-transform: uppercase;
  text-decoration: none;
  display: inline-block;
  color: #fff;
  padding: 5px 10px;
  margin: 0 5px;
  background-color: #b83729;
  -moz-transition: all 0.2s ease-in;
  -o-transition: all 0.2s ease-in;
  -webkit-transition: all 0.2s ease-in;
  transition: all 0.2s ease-in;
}

p a:hover {
  background-color: #ab3326;
}

.select-hidden {
  display: none;
  visibility: hidden;
  padding-right: 10px;
}

.select {
  cursor: pointer;
  display: inline-block;
  position: relative;
  font-size: 16px;
  color: #fff;
  width: 220px;
  height: 40px;
}

.select-styled {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: #c0392b;
  padding: 8px 15px;
  -moz-transition: all 0.2s ease-in;
  -o-transition: all 0.2s ease-in;
  -webkit-transition: all 0.2s ease-in;
  transition: all 0.2s ease-in;
}

.select-styled:after {
  content: "";
  width: 0;
  height: 0;
  border: 7px solid transparent;
  border-color: #fff transparent transparent transparent;
  position: absolute;
  top: 16px;
  right: 10px;
}

.select-styled:hover {
  background-color: #b83729;
}

.select-styled:active,
.select-styled.active {
  background-color: #ab3326;
}

.select-styled:active:after,
.select-styled.active:after {
  top: 9px;
  border-color: transparent transparent #fff transparent;
}

.select-options {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  z-index: 999;
  margin: 0;
  padding: 0;
  list-style: none;
  background-color: #ab3326;
}

.select-options li {
  margin: 0;
  padding: 12px 0;
  text-indent: 15px;
  border-top: 1px solid #962d22;
  -moz-transition: all 0.15s ease-in;
  -o-transition: all 0.15s ease-in;
  -webkit-transition: all 0.15s ease-in;
  transition: all 0.15s ease-in;
}

.select-options li:hover {
  color: #c0392b;
  background: #fff;
}

.select-options li[rel="hide"] {
  display: none;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="dropdown">
  <select id="mounth">
    <option value="hide">-- Month --</option>
    <option value="january" rel="icon-temperature">January</option>
    <option value="february">February</option>
    <option value="march">March</option>
    <option value="april">April</option>
    <option value="may">May</option>
    <option value="june">June</option>
    <option value="july">July</option>
    <option value="august">August</option>
    <option value="september">September</option>
    <option value="october">October</option>
    <option value="november">November</option>
    <option value="december">December</option>
  </select>

  <select id="year">
    <option value="hide">-- Year --</option>
    <option value="2010">2010</option>
    <option value="2011">2011</option>
    <option value="2012">2012</option>
    <option value="2013">2013</option>
    <option value="2014">2014</option>
    <option value="2015">2015</option>
  </select>
</div>

Answer 2

我将您原来的jsfiddle分叉为html中的注释。我在show元素上添加了slideToggle（“ slow”），在hide元素上添加了slideUp（“ slow”）。这似乎可以解决randomSouls解决方案中的问题。这是小提琴：http://jsfiddle.net/ywv32ud8/，我在下面添加了可行的解决方案。如果您真的想同时使用slideToggle，我可以提出一个不同的解决方案，但这似乎比创建一个新功能要容易，而不是使用已经存在的功能。希望这会有所帮助。

// Iterate over each select element
$('select').each(function () {

    // Cache the number of options
    var $this = $(this),
        numberOfOptions = $(this).children('option').length;

    // Hides the select element
    $this.addClass('s-hidden');

    // Wrap the select element in a div
    $this.wrap('<div class="select"></div>');

    // Insert a styled div to sit over the top of the hidden select element
    $this.after('<div class="styledSelect"></div>');

    // Cache the styled div
    var $styledSelect = $this.next('div.styledSelect');

    // Show the first select option in the styled div
    $styledSelect.text($this.children('option').eq(0).text());

    // Insert an unordered list after the styled div and also cache the list
    var $list = $('<ul />', {
        'class': 'options'
    }).insertAfter($styledSelect);

    // Insert a list item into the unordered list for each select option
    for (var i = 0; i < numberOfOptions; i++) {
        $('<li />', {
            text: $this.children('option').eq(i).text(),
            rel: $this.children('option').eq(i).val()
        }).appendTo($list);
    }

    // Cache the list items
    var $listItems = $list.children('li');

    // Show the unordered list when the styled div is clicked (also hides it if the div is clicked again)
    $styledSelect.click(function (e) {
        e.stopPropagation();
        $('div.styledSelect.active').each(function () {
            $(this).removeClass('active').next('ul.options').hide();
        });
        $(this).toggleClass('active').next('ul.options').slideToggle("slow");
    });

    // Hides the unordered list when a list item is clicked and updates the styled div to show the selected list item
    // Updates the select element to have the value of the equivalent option
    $listItems.click(function (e) {
        e.stopPropagation();
        $styledSelect.text($(this).text()).removeClass('active');
        $this.val($(this).attr('rel'));
        $list.slideUp("slow");
        /* alert($this.val()); Uncomment this for demonstration! */
    });

    // Hides the unordered list when clicking outside of it
    $(document).click(function () {
        $styledSelect.removeClass('active');
        $list.slideUp("slow");
    });

});

body {
  font-family: Lato, Arial;
  color: #fff;
  padding: 20px;
  background-color: #e74c3c;
}
h1 {
  font-weight: normal;
  font-size: 40px;
  font-weight: normal;
  text-transform: uppercase;
}

h1 span {
  font-size: 13px;
  display: block;
  padding-left: 4px;
}

p {
  margin-top: 200px;
}

p a {
  text-transform: uppercase;
  text-decoration: none;
  display: inline-block;
  color: #fff;
  padding: 5px 10px;
  margin: 0 5px;
  background-color: #b83729;
  -moz-transition: all 0.2s ease-in;
  -o-transition: all 0.2s ease-in;
  -webkit-transition: all 0.2s ease-in;
  transition: all 0.2s ease-in;
}

p a:hover {
  background-color: #ab3326;
}

.s-hidden {
  display: none;
  visibility: hidden;
  padding-right: 10px;
}
.select {
  cursor: pointer;
  display: inline-block;
  position: relative;
  font-size: 16px;
  color: #fff;
  width: 220px;
  height: 40px;
}
.styledSelect {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  background-color: #c0392b;
  padding: 8px 15px;
  -moz-transition: all 0.2s ease-in;
  -o-transition: all 0.2s ease-in;
  -webkit-transition: all 0.2s ease-in;
  transition: all 0.2s ease-in;
}
.styledSelect:after {
  content: "";
  width: 0;
  height: 0;
  border: 7px solid transparent;
  border-color: #fff transparent transparent transparent;
  position: absolute;
  top: 16px;
  right: 10px;
}
.styledSelect:hover {
  background-color: #b83729;
}
.styledSelect:active, .styledSelect.active {
   background-color: #ab3326;
}
.styledSelect:active:after,
.styledSelect.active:after{
  top: 9px;
  border-color: transparent transparent #fff transparent;
}
.options {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  left: 0;
  z-index: 999;
  margin: 0;
  padding: 0;
  list-style: none;
  background-color: #ab3326;
}
.options li {
  margin: 0;
  padding: 12px 0;
  text-indent: 15px;
  border-top: 1px solid #962d22;
  -moz-transition: all 0.15s ease-in;
  -o-transition: all 0.15s ease-in;
  -webkit-transition: all 0.15s ease-in;
  transition: all 0.15s ease-in;
}
.options li:hover {
  color: #c0392b;
  background: #fff;
}

.options li[rel="hide"] {
  display: none;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<div class="dropdown">
  <select id="mounth">
    <option value="hide">-- Month --</option>
    <option value="january" rel="icon-temperature">January</option>
    <option value="february">February</option>
    <option value="march">March</option>
    <option value="april">April</option>
    <option value="may">May</option>
    <option value="june">June</option>
    <option value="july">July</option>
    <option value="august">August</option>
    <option value="september">September</option>
    <option value="october">October</option>
    <option value="november">November</option>
    <option value="december">December</option>
  </select>

  <select id="year">
    <option value="hide">-- Year --</option>
    <option value="2010">2010</option>
    <option value="2011">2011</option>
    <option value="2012">2012</option>
    <option value="2013">2013</option>
    <option value="2014">2014</option>
    <option value="2015">2015</option>
  </select>
</div>