Question

我正在使用以下样式的下拉菜单：

https://codepen.io/wallaceerick/pen/ctsCz

<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>

问题是此菜单不可滚动且其高度没有限制。请问有什么人可以告诉我如何修改css以将下拉列表的高度限制为特定数量的项目并使其像普通下拉列表一样滚动？

Answer 1

您可以将grouped = GROUP table BY Num; filtered = FILTER grouped BY group == 300; DUMP filtered;添加到max-height并设置.select-options

＆＃13;

overflow-y: scroll

＆＃13;

/*
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();
    });

});

＆＃13;

@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;
}

.select-options {
  max-height: 176px;
  overflow-y: scroll;
}

＆＃13;

Answer 2

您可以在CSS中设置下拉菜单的下拉内容的overflow属性。然后，如果您设置height的{{1}}，则菜单会自动允许滚动，如果它的高度有限。

如何使样式下拉列表可滚动？

2 个答案: