javascript - JQuery 事件只触发一次

Question

我正在尝试使用SlimSelect在每个字段中使用水平文本滚动来制作多选下拉框。现在一切似乎都正常了，但问题是，它只工作一次（第一次点击一个值）。在那之后，mouseover和mouseout似乎就放弃了。我已经查看了堆栈，但是所有这些问题都有代码答案，并且缺乏关于“为什么它只触发一次”的一般解释，所以这对我没有帮助。

$('.ms-class > option').addClass('scroll-text ellipsis');

new SlimSelect({
  select: '#slim-multi-select',
  allowDeselectOption: true,
  showContent: 'down',
})

$(".ss-option.scroll-text").on({
  mouseover: function() {
    $(this).removeClass("ellipsis");
    var maxscroll = $(this)[0].scrollWidth;
    var speed = maxscroll * 15;
    $(this).animate({
      scrollLeft: maxscroll
    }, speed, "linear");
  },
  mouseout: function() {
    $(this).stop();
    $(this).addClass("ellipsis");
    $(this).animate({
      scrollLeft: 0
    }, 'slow');
  }
});

.ms-class {
  width: 200px !important;
}

.ms-class .ss-content {
  z-index: 2;
}

.ms-class .ss-content .ss-list {
  max-height: 100% !important;
}

.ms-class .ss-multi-selected .ss-values .ss-value {
  font-size: 14px;
  margin: 5px 5px 5px 0;
  background-color: #884fa1;
}

.ms-class .ss-content .ss-list .ss-option,
.ms-class .ss-content .ss-list .ss-option-selected {
  display: inline-block;
  width: 33%;
}

.ms-class .ss-content .ss-list .ss-option.ss-hide,
.ms-class .ss-content .ss-list .ss-option.ss-hide {
  display: none;
}

.ms-class .ss-content .ss-list .ss-option,
.ms-class .ss-content .ss-list .ss-option-selected {
  display: inline-block;
  width: 25%;
}

.ms-class .ss-content .ss-list .ss-option {
  vertical-align: middle;
  text-align: center;
  height: 50px;
  line-height: 0.9em;
  white-space: nowrap;
  overflow: hidden !important;
}

.ms-class .ss-content .ss-list .ss-option:after {
  content: "";
  display: inline-block;
  vertical-align: middle;
  height: 100%;
}

.ss-option:hover {
  background-color: #884fa1 !important;
  color: white;
}

.ms-class .ss-multi-selected .ss-values .ss-disabled,
.ms-class .ss-content .ss-search input {
  font-family: 'Exo 2', 'Font Awesome 5 Free';
  font-weight: 900 !important;
  color: #444444 !important;
}

.ms-class .ss-multi-selected .ss-values .ss-disabled {
  margin: 0 8px;
}

.ms-class .ss-content .ss-list .ss-option:only-child,
.ms-class .ss-content .ss-list .ss-option.ss-disabled:only-child {
  width: 100% !important;
}

.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(2),
.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(2)~.ss-option {
  width: 50% !important;
}

.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(3),
.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(3)~.ss-option {
  width: 33% !important;
}

.ms-class .ss-content .ss-list .ss-option.ss-disabled:only-child {
  width: 100% !important;
}

.ms-class .ss-multi-selected {
  border-radius: 5px !important;
  border: solid 1px #e8e8e8 !important;
  min-height: 42px !important;
  line-height: 100%;
  -webkit-tap-highlight-color: transparent;
}

.ms-class .ss-multi-selected .ss-add {
  display: flex;
  flex: 0 1 3px;
  margin: 14px 12px 0 5px;
}

.ms-class .ss-multi-selected .ss-add .ss-plus,
.ms-class .ss-multi-selected .ss-add .ss-plus:after {
  background: #999;
}

.ms-class .ss-content .ss-list .ss-option:not(.ss-disabled).ss-option-selected {
  background-color: rgba(136, 79, 161, 0.32);
}

.ms-class .ss-content .ss-list .ss-option:not(.ss-disabled).ss-option-selected:hover {
  color: white !important;
}

.ellipsis {
  text-overflow: ellipsis;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/slim-select/1.23.0/slimselect.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/slim-select/1.23.0/slimselect.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="slim-multi-select" class="ms-class" multiple>
  <option value="value 1">Some long value that doesn't fit here</option>
  <option value="value 2">Value 2</option>
  <option value="value 3">Another real long value that doesn't fit</option>
  <option value="value 4">Value 4</option>
  <option value="value 5">Value 5</option>
</select>

我对前端的东西不是很好，所以我很感激一些帮助。

标签： javascriptjquerycss

Answer 1

js中的以下更改将起作用：

$(".ss-content").on('mouseover', '.ss-option.scroll-text', function() {
  $(this).removeClass("ellipsis");
  var maxscroll = $(this)[0].scrollWidth;
  var speed = maxscroll * 15;
  $(this).animate({
    scrollLeft: maxscroll
  }, speed, "linear");
});
$(".ss-content").on('mouseout', '.ss-option.scroll-text', function() {
  $(this).stop();
  $(this).addClass("ellipsis");
  $(this).animate({
    scrollLeft: 0
  }, 'slow');
});

---

您的代码无法正常工作的原因

您的代码仅在您单击任何项​​目之前有效。单击时，slimSlect删除所有 dom 并重新创建它，这也会删除附加到该 DOM 的事件。由于您的 DOM 和附加到它的事件被删除，因此这两个mouseout/over事件都不起作用。

我如何解决这个问题：

查看代码块，$(".ss-content").on('mouseout', '.ss-option.scroll-text'. .ss-content当您mouserout/over搜索.ss-option.scroll-text将始终存在的课程时，我已在此处附加该事件。

如果您从父项中进行选择，则您的动态子 dom 将始终附加该事件。

@Nowshath 如何解决这个问题： 他添加了一个钩子，每当您尝试打开或更改值时，该钩子都会beforeOpen and onChange调用该方法将事件注册到 domScrollText

---

$('.ms-class > option').addClass('scroll-text ellipsis');

new SlimSelect({
  select: '#slim-multi-select',
  allowDeselectOption: true,
  showContent: 'down',
})

$(".ss-content").on('mouseover', '.ss-option.scroll-text', function() {
  $(this).removeClass("ellipsis");
  var maxscroll = $(this)[0].scrollWidth;
  var speed = maxscroll * 15;
  $(this).animate({
    scrollLeft: maxscroll
  }, speed, "linear");
});
$(".ss-content").on('mouseout', '.ss-option.scroll-text', function() {
  $(this).stop();
  $(this).addClass("ellipsis");
  $(this).animate({
    scrollLeft: 0
  }, 'slow');
});

.ms-class {
  width: 200px !important;
}

.ms-class .ss-content {
  z-index: 2;
}

.ms-class .ss-content .ss-list {
  max-height: 100% !important;
}

.ms-class .ss-multi-selected .ss-values .ss-value {
  font-size: 14px;
  margin: 5px 5px 5px 0;
  background-color: #884fa1;
}

.ms-class .ss-content .ss-list .ss-option,
.ms-class .ss-content .ss-list .ss-option-selected {
  display: inline-block;
  width: 33%;
}

.ms-class .ss-content .ss-list .ss-option.ss-hide,
.ms-class .ss-content .ss-list .ss-option.ss-hide {
  display: none;
}

.ms-class .ss-content .ss-list .ss-option,
.ms-class .ss-content .ss-list .ss-option-selected {
  display: inline-block;
  width: 25%;
}

.ms-class .ss-content .ss-list .ss-option {
  vertical-align: middle;
  text-align: center;
  height: 50px;
  line-height: 0.9em;
  white-space: nowrap;
  overflow: hidden !important;
}

.ms-class .ss-content .ss-list .ss-option:after {
  content: "";
  display: inline-block;
  vertical-align: middle;
  height: 100%;
}

.ss-option:hover {
  background-color: #884fa1 !important;
  color: white;
}

.ms-class .ss-multi-selected .ss-values .ss-disabled,
.ms-class .ss-content .ss-search input {
  font-family: 'Exo 2', 'Font Awesome 5 Free';
  font-weight: 900 !important;
  color: #444444 !important;
}

.ms-class .ss-multi-selected .ss-values .ss-disabled {
  margin: 0 8px;
}

.ms-class .ss-content .ss-list .ss-option:only-child,
.ms-class .ss-content .ss-list .ss-option.ss-disabled:only-child {
  width: 100% !important;
}

.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(2),
.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(2)~.ss-option {
  width: 50% !important;
}

.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(3),
.ms-class .ss-content .ss-list .ss-option:first-child:nth-last-child(3)~.ss-option {
  width: 33% !important;
}

.ms-class .ss-content .ss-list .ss-option.ss-disabled:only-child {
  width: 100% !important;
}

.ms-class .ss-multi-selected {
  border-radius: 5px !important;
  border: solid 1px #e8e8e8 !important;
  min-height: 42px !important;
  line-height: 100%;
  -webkit-tap-highlight-color: transparent;
}

.ms-class .ss-multi-selected .ss-add {
  display: flex;
  flex: 0 1 3px;
  margin: 14px 12px 0 5px;
}

.ms-class .ss-multi-selected .ss-add .ss-plus,
.ms-class .ss-multi-selected .ss-add .ss-plus:after {
  background: #999;
}

.ms-class .ss-content .ss-list .ss-option:not(.ss-disabled).ss-option-selected {
  background-color: rgba(136, 79, 161, 0.32);
}

.ms-class .ss-content .ss-list .ss-option:not(.ss-disabled).ss-option-selected:hover {
  color: white !important;
}

.ellipsis {
  text-overflow: ellipsis;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/slim-select/1.23.0/slimselect.min.js"></script>
<link href="https://cdnjs.cloudflare.com/ajax/libs/slim-select/1.23.0/slimselect.min.css" rel="stylesheet" />
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<select id="slim-multi-select" class="ms-class" multiple>
  <option value="value 1">Some long value that doesn't fit here</option>
  <option value="value 2">Value 2</option>
  <option value="value 3">Another real long value that doesn't fit</option>
  <option value="value 4">Value 4</option>
  <option value="value 5">Value 5</option>
</select>