选择选项后，从下拉列表中选择2个多选择删除选项

Question

我正在使用Jquery Select2来使用复选框进行多选。我想从下拉列表中删除所选项目。我正在使用下面的代码。它正在删除该项目。但是在选择项目后，我得到了输入和下拉菜单之间的差距。

我的代码是， Javascript，

$('.js-select2'): {
closeOnSelect: false,
placeholder: "Placeholder",
allowHtml: true,
tags: true,
allowClear: true,
minimumResultsForSearch: -1,
}
$("select").on("select2:select", function (evt) {
var element = evt.params.data.element;
var $element = $(element);
$element.detach();
$(this).append($element);
$(this).trigger("change");
});

.CSS

.select2-container {
min-width: 100%;
}
.select2-results__option {
padding-right: 20px;
vertical-align: middle;
}
.select2-results__option:before {
content: "";
display: inline-block;
position: relative;
height: 20px;
width: 20px;
border: 2px solid #e9e9e9;
background-color: #fff;
margin-right: 20px;
vertical-align: middle;
}
.select2-container--default .select2-selection--multiple {
background-color: #FFFFFF;
border: 1px solid #CBD5DD;
border-radius: 2px;
cursor: text;
height: auto !important;
margin: 0;
min-height: 30px;
overflow: hidden;
padding: 2px;
position: relative;
width: 100%;
}
.select2-results__option[aria-selected=true] {
display: none;
}
.select2-container--default .select2-results__option[aria-selected=true] {
background-color: #fff;
}
.select2-container--default .select2-results__option--highlighted[aria-selected] {
background-color: #3875d7;
background-image: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(20%, #3875d7), color-stop(90%, #2a62bc));
background-image: -webkit-linear-gradient(#3875d7 20%, #2a62bc 90%);
background-image: -moz-linear-gradient(#3875d7 20%, #2a62bc 90%);
background-image: -o-linear-gradient(#3875d7 20%, #2a62bc 90%);
background-image: linear-gradient(#3875d7 20%, #2a62bc 90%);
color: #fff;
}
.select2-container--default .select2-selection--multiple {
margin-bottom: 10px;
}
.select2-container--default.select2-container--open.select2-container--below .select2-selection--multiple {
border-radius: 4px;
}
.select2-container--default.select2-container--focus .select2-selection--multiple {
border: 1px solid #5897fb;
box-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
}
.select2-container--default .select2-selection--multiple {
border-width: 1px;
}
.select2-container--open .select2-dropdown--below {
border-radius: 6px;
box-shadow: 0 0 10px rgba(0,0,0,0.5);
}
.select2-selection .select2-selection--multiple:after {
content: 'hhghgh';
}
/* select with icons badges single*/
.select-icon .select2-selection__placeholder .badge {
display: none;
}
.select-icon .placeholder {
display: none;
}
.select-icon .select2-results__option:before,
.select-icon .select2-results__option[aria-selected=true]:before {
display: none !important;
/* content: "" !important; */
}
.select-icon  .select2-search--dropdown {
display: none;
}
.select2-container--default .select2-selection--multiple .select2-selection__choice {
position: relative;
margin: 3px 0 3px 5px;
padding: 3px 3px 3px 5px;
border: 1px solid #aaa;
border-radius: 3px;
background-color: #e4e4e4;
background-image: -webkit-gradient(linear, 50% 0%, 50% 100%, color-stop(20%, #f4f4f4), color-stop(50%, #f0f0f0), color-stop(52%, #e8e8e8), color-stop(100%, #eeeeee));
background-image: -webkit-linear-gradient(#f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
background-image: -moz-linear-gradient(#f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
background-image: -o-linear-gradient(#f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
background-image: linear-gradient(#f4f4f4 20%, #f0f0f0 50%, #e8e8e8 52%, #eeeeee 100%);
background-clip: padding-box;
box-shadow: 0 0 2px white inset, 0 1px 0 rgba(0, 0, 0, 0.05);
color: #333;
line-height: 13px;
cursor: default;
}
.select2-container--default .select2-selection--multiple .select2-selection__rendered li {
list-style: none;
width: auto !important;
}
.select2-remove-right {
float: right;
}
.select2-container--default .select2-selection--multiple .select2-selection__choice__remove {
float: right;
margin-left: 5px;
}
ul.select2-choices {
padding-right: 30px !important;
}
ul.select2-choices:after {
content: "";
position: absolute;
right: 10px;
top: 50%;
transform: translateY(-50%);
border-top: 5px solid #333;
border-left: 5px solid transparent;
border-right: 5px solid transparent;
}
.select2-container--default .select2-search--inline .select2-search__field{
width:initial!important;
}
.select2-dropdown {
border-radius: 0px;
background-color: white;
border: 1px solid #DDD;
box-sizing: border-box;
display: block;
position: absolute;
left: -100000px;
width: 100%;
z-index: 1051;
}
/* line 43, ../scss/_dropdown.scss */
.select2-container--open .select2-dropdown--above {
border-bottom: none;
border-bottom-left-radius: 0;
border-bottom-right-radius: 0;
}
.select2-container--open .select2-dropdown--below {
border-top: none;
border-top-left-radius: 0;
border-top-right-radius: 0;
}
.select2-container--open .select2-dropdown {
left: 0;
}
.select2-search--dropdown {
display: block;
padding: 7px;
}
.select2-search--dropdown .select2-search__field {
padding: 4px;
width: 100%;
box-sizing: border-box;
}
.select2-search--dropdown .select2-search__field::-webkit-search-cancel-button {
-webkit-appearance: none;
}
.select2-search--dropdown.select2-search--hide {
display: none;
}

Answer 1

试试这个

https://stackoverflow.com/a/56195248/4208247

或者这个

https://select2.org/selections#clearable-selections

可清除的选择 设置为 true 时，当选择值时，选择框上会显示一个清除按钮("x"图标(。单击清除按钮将清除所选值，从而有效地将选择框重置回其占位符值。

$('select').select2({
placeholder: 'This is my placeholder',
allowClear: true
});