我正在使用带有jQuery的selected.js插件http://harvesthq.github.com/chosen/来允许用户从select中选择多个选项。但是,我现在希望能够让他们创建尚未存在的值 - 任何想法如何解决这个问题?
编辑:与SO自己的标签选择/创建栏类似的东西将接近我所追求的最好不要更改或编辑插件,但如果需要,也可以。
代码: HTML:
<p>Select something</p>
<select name="theSelect[]" multiple="multiple">
<option value="First Option">First Option</option>
<option value="Second Option">Second Option</option>
</select>
使用Javascript:
$(function(){
$('select').chosen();
});
因此,如果用户输入“第三选项”,我想将其添加到列表中并选择它。值和显示名称是/将是相同的,所以这不是一个问题
答案 0 :(得分:24)
根据文档,您可以尝试这样做:
$('select').append('<option>test</option>');
$('select').trigger('liszt:updated');
Tony在下面的评论中说:
“从版本1.0开始,现在选择了触发器:已更新”。请参阅harvesthq.github.io/chosen/#change-update-events“
答案 1 :(得分:19)
我偶然发现了同样的想法。 看起来它是一个非常受欢迎的功能请求,并且有几个叉实现了它。看起来它很快就会合并到主分支中。
+1这个特殊的拉动有魅力: https://github.com/harvesthq/chosen/pull/166
您可以在此处查看Koenpunt的分叉:https://github.com/koenpunt/chosen
答案 2 :(得分:11)
这是我做到的一种简单方法:
$(".search-field").find("input").live( "keydown", function (evt) {
var stroke;
stroke = (_ref = evt.which) != null ? _ref : evt.keyCode;
if (stroke == 9) { // 9 = tab key
$('#tags').append('<option value="' + $(this).val() + '" selected="selected">' + $(this).val() + '</option>');
$('#tags').trigger('chosen:updated');
}
});
答案 3 :(得分:10)
我只是想解决同样的问题。我稍微修改了源代码。这是新的keyup_checker函数。看一下案例13:
AbstractChosen.prototype.keyup_checker = function(evt) {
var stroke, _ref;
stroke = (_ref = evt.which) != null ? _ref : evt.keyCode;
this.search_field_scale();
switch (stroke) {
case 8:
if (this.is_multiple && this.backstroke_length < 1 && this.choices > 0) {
return this.keydown_backstroke();
} else if (!this.pending_backstroke) {
this.result_clear_highlight();
return this.results_search();
}
break;
case 13:
evt.preventDefault();
if (this.results_showing) {
if (!this.is_multiple || this.result_highlight) {
return this.result_select(evt);
}
$(this.form_field).append('<option>' + $(evt.target).val() + '</option>');
$(this.form_field).trigger('liszt:updated');
this.result_highlight = this.search_results.find('li.active-result').last();
return this.result_select(evt);
}
break;
case 27:
if (this.results_showing) this.results_hide();
return true;
case 9:
case 38:
case 40:
case 16:
case 91:
case 17:
break;
default:
return this.results_search();
}
};
答案 4 :(得分:5)
我知道这不是答案,而是另一种解决方案。
我正在搜索即时添加部分,发现http://ivaynberg.github.com/select2/#tags提供的内容与选择+“标记”等其他内容相同。
答案 5 :(得分:4)
您可以将事件附加到输入文本框以侦听特定字符代码。之后添加选项并在下拉列表中触发更新。
var dropDown = $('select.chosen');
dropDown.parent().find('.chzn-container .chzn-search input[type=text]').keydown( function (evt) {
var stroke, _ref, target, list;
// get keycode
stroke = (_ref = evt.which) != null ? _ref : evt.keyCode;
target = $(evt.target);
// get the list of current options
list = target.parents('.chzn-container').find('.chzn-choices li.search-choice > span').map(function () { return $(this).text(); }).get();
if (stroke === 9 || stroke === 13) {
var value = $.trim(target.val());
// if the option does not exists
if ($.inArray(value,list) < 0) {
var option = $('<option>');
option.text(value).val(value).appendTo(dropDown);
option.attr('selected','selected');
// add the option and set as selected
}
// trigger the update event
dropDown.trigger("liszt:updated");
return true;
}
});
答案 6 :(得分:1)
leogdion答案的更新,适用于所选的更高版本:
var dropDown = $('#select_chosen');
// Make the chosen drop-down dynamic. If a given option is not in the list, the user can still add it
dropDown.parent().find('.chosen-container .search-field input[type=text]').keydown(
function (evt) {
var stroke, _ref, target, list;
// get keycode
stroke = (_ref = evt.which) != null ? _ref : evt.keyCode;
// If enter or tab key
if (stroke === 9 || stroke === 13) {
target = $(evt.target);
// get the list of current options
chosenList = target.parents('.chosen-container').find('.chosen-choices li.search-choice > span').map(function () { return $(this).text(); }).get();
// get the list of matches from the existing drop-down
matchList = target.parents('.chosen-container').find('.chosen-results li').map(function () { return $(this).text(); }).get();
// highlighted option
highlightedList = target.parents('.chosen-container').find('.chosen-results li.highlighted').map(function () { return $(this).text(); }).get();
// Get the value which the user has typed in
var newString = $.trim(target.val());
// if the option does not exists, and the text doesn't exactly match an existing option, and there is not an option highlighted in the list
if ($.inArray(newString,matchList) < 0 && $.inArray(newString,chosenList) < 0 && highlightedList.length == 0) {
// Create a new option and add it to the list (but don't make it selected)
var newOption = '<option value="' + newString + '">' + newString + '</option>';
$("#select").prepend(newOption);
// trigger the update event
$("#select").trigger("chosen:updated");
// tell chosen to close the list box
$("#select").trigger("chosen:close");
return true;
}
// otherwise, just let the event bubble up
return true;
}
}
)
答案 7 :(得分:1)
我再次更新了3nochroot的代码。现在我只有一个选择器来查找多选输入。
$(document).ready(function() {
$(".js-choicelist").chosen({
//config comes here
}).parent().find('.chosen-container .search-field input[type=text]').keydown(
function (evt) {
var stroke, _ref, target, list;
// get keycode
stroke = (_ref = evt.which) != null ? _ref : evt.keyCode;
// If enter or tab key
if (stroke === 9 || stroke === 13) {
target = $(evt.target);
// get the list of current options
chosenList = target.parents('.chosen-container').find('.chosen-choices li.search-choice > span').map(function () { return $(this).text(); }).get();
// get the list of matches from the existing drop-down
matchList = target.parents('.chosen-container').find('.chosen-results li').map(function () { return $(this).text(); }).get();
// highlighted option
highlightedList = target.parents('.chosen-container').find('.chosen-results li.highlighted').map(function () { return $(this).text(); }).get();
// Get the value which the user has typed in
var newString = $.trim(target.val());
// if the option does not exists, and the text doesn't exactly match an existing option, and there is not an option highlighted in the list
if ($.inArray(newString,matchList) < 0 && $.inArray(newString,chosenList) < 0 && highlightedList.length == 0) {
// Create a new option and add it to the list (but don't make it selected)
var newOption = '<option value="' + newString + '">' + newString + '</option>';
var choiceSelect = target.parents('.select-multiple').find('select');
choiceSelect.prepend(newOption);
// trigger the update event
choiceSelect.trigger("chosen:updated");
// tell chosen to close the list box
choiceSelect.trigger("chosen:close");
return true;
}
// otherwise, just let the event bubble up
return true;
}
}
)
})
答案 8 :(得分:0)
针对多项选择(gist)更新Leogdion答案
$(".chosen-select-with-add-new").chosen({
no_results_text: "Click Enter or Tab to add new option",
width: '100%'
}).parent().find('.chosen-container .search-field input[type=text]').keydown(function (evt) {
// get keycode
const stroke = evt.which != null ? evt.which : evt.keyCode;
// If enter or tab key
if (stroke === 9 || stroke === 13) {
const target = $(evt.target);
// get the list of current options
const chosenList = target.parents('.chosen-container').find('.chosen-choices li.search-choice > span').map(function () { return $(this).text(); }).get();
// get the list of matches from the existing drop-down
const matchList = target.parents('.chosen-container').find('.chosen-results li').map(function () { return $(this).text(); }).get();
// highlighted option
const highlightedList = target.parents('.chosen-container').find('.chosen-results li.highlighted').map(function () { return $(this).text(); }).get();
// Get the value which the user has typed in
const newString = $.trim(target.val());
// if the option does not exists, and the text doesn't exactly match an existing option, and there is not an option highlighted in the list
if ($.inArray(newString, matchList) < 0 && $.inArray(newString,chosenList) < 0 && highlightedList.length == 0) {
// Create a new option and add it to the list (but don't make it selected)
const newOption = '<option value="' + newString + '" selected="selected">' + newString + '</option>';
const choiceSelect = target.parents('.chosen-container').siblings('.chosen-select-with-add-new');
choiceSelect.append(newOption);
// trigger the update event
choiceSelect.trigger("chosen:updated");
// tell chosen to close the list box
choiceSelect.trigger("chosen:close");
return true;
}
// otherwise, just let the event bubble up
return true;
}
})
在导轨(细长型)上的用法示例
.tag-list
label.control-label.h5 Tag list
= select_tag :tag_list, options_for_select(ActsAsTaggableOn::Tag.order('taggings_count desc').pluck(:name), @publication.tags.map(&:name)), multiple: true, data: { placeholder: 'north, east, south, west' }, class: 'chosen-select-with-add-new'
答案 9 :(得分:0)
我尝试了这里和其他地方提供的几种解决方案,但是在choed.js 1.8.5(jQuery:3.3.1)中都无法解决问题,因此我结束了以下内容,因为我不想使用可能不会使用的fork始终是最新的master分支:
对于不希望任何.chosen-select
允许新值的情况,我添加了一个新类.chosen-newValuesAllowed
。我在此类上设置了一个事件处理程序,其中 CTRL + I 添加新值(如果尚不存在)。之后,对输入字段的关注不会丢失。在我的示例中,由于@value实际上包含数据库ID,因此我检查了innerHTML,因此新值(在我的示例中为字符串,稍后将由服务器处理)在@value中永远找不到。如果要检查@value,请参见代码片段中的注释。
该代码处理单个和多个选择。
$(document).on("keydown", ".chosen-container.chosen-newValuesAllowed input", function(e) {
if (e.ctrlKey === true && e.keyCode === 73) { // CTRL + I
e.preventDefault();
var newValue = $(this).val();
if (newValue) {
try {
// only add if there is no option having the content/text of "input" yet!
// instead of filter() for the content of <option> you can check on its @value by: find("option[val='...']")
var $selectElement = $(e.target).closest("div.chosen-container").prev(); // the previous sibling should be the <select>. If not, grab it some other way, e.g. via @id
if (!$selectElement.find("option").filter(function () { return $(this).html() === newValue; }).length) {
if (!$selectElement.attr("multiple")) { // unselect for single-select
$selectElement.val('');
}
$selectElement.append('<option val="' + newValue + '" selected>' + newValue + '</option>');
$selectElement.trigger('chosen:updated');
}
} catch(error) {
// pass
}
e.target.focus();
}
return false;
}
});
另一种解决方案是,如果仅在明确没有结果的情况下才添加新值,则调用可触发函数 chosen:no_results :
$(".chosen-select.chosen-newValuesAllowed").on("chosen:no_results", function(e, data){
var newValue = data.chosen.get_search_text();
...
});