我正在使用jquery ui自动完成组合框，它工作得很好，但现在我有点贪心。我想能够向其中添加类别。如果我添加了类别（如下面的示例），生成的组合框将基于菜单，并且与jquery ui自动完成类别版中的类别显示相同的HTML标签。
<select>
<optgroup name="Cat 1">
<option value="1a">One A</option>
<option value="1b">One B</option>
<option value="1c">One C</option>
</optgroup>
<optgroup name="Cat 2">
<option value="2a">Two A</option>
<option value="2b">Two B</option>
<option value="2c">Two C</option>
</optgroup>
</select>
我创建了一个http://jsfiddle.net/nH3b6/11/。
感谢任何帮助或指导。
在 @Jarry 的建议基础上，我会更新你的代码以确定 option 属于哪个 optgroup。然后，您可以使用与 jQueryUI 网站上找到的类似代码：
(function($) {
$.widget("ui.combobox", {
_create: function() {
var input, self = this,
select = this.element.hide(),
selected = select.children(":selected"),
value = selected.val() ? selected.text() : "",
wrapper = this.wrapper = $("<span>").addClass("ui-combobox").insertAfter(select);
input = $("<input>").appendTo(wrapper).val(value).addClass("ui-state-default ui-combobox-input").autocomplete({
delay: 0,
minLength: 0,
source: function(request, response) {
var matcher = new RegExp($.ui.autocomplete.escapeRegex(request.term), "i");
response(select.find("option").map(function() {
var text = $(this).text();
if (this.value && (!request.term || matcher.test(text))) return {
label: text.replace(
new RegExp("(?![^&;]+;)(?!<[^<>]*)(" + $.ui.autocomplete.escapeRegex(request.term) + ")(?![^<>]*>)(?![^&;]+;)", "gi"), "<strong>$1</strong>"),
value: text,
option: this,
category: $(this).closest("optgroup").attr("label")
};
//MK
$('#test').attr('style', 'display: none;');
}).get());
},
select: function(event, ui) {
ui.item.option.selected = true;
self._trigger("selected", event, {
item: ui.item.option
});
},
change: function(event, ui) {
if (!ui.item) {
var matcher = new RegExp("^" + $.ui.autocomplete.escapeRegex($(this).val()) + "$", "i"),
valid = false;
select.children("option").each(function() {
if ($(this).text().match(matcher)) {
this.selected = valid = true;
return false;
}
});
if (!valid) {
$('#test').attr('style', 'display: block;');
// remove invalid value, as it didn't match anything
//$( this ).val( "" );
//select.val( "" );
//input.data( "autocomplete" ).term = "";
//return false;
}
}
}
}).addClass("ui-widget ui-widget-content ui-corner-left");
input.data("autocomplete")._renderItem = function(ul, item) {
return $("<li></li>").data("item.autocomplete", item).append("<a>" + item.label + "</a>").appendTo(ul);
};
input.data("autocomplete")._renderMenu = function(ul, items) {
var self = this,
currentCategory = "";
$.each(items, function(index, item) {
if (item.category != currentCategory) {
if (item.category) {
ul.append("<li class='ui-autocomplete-category'>" + item.category + "</li>");
}
currentCategory = item.category;
}
self._renderItem(ul, item);
});
};
$("<a>").attr("tabIndex", -1).attr("title", "Show All Items").appendTo(wrapper).button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
}).removeClass("ui-corner-all").addClass("ui-corner-right ui-combobox-toggle").click(function() {
// close if already visible
if (input.autocomplete("widget").is(":visible")) {
input.autocomplete("close");
return;
}
// work around a bug (likely same cause as #5265)
$(this).blur();
// pass empty string as value to search for, displaying all results
input.autocomplete("search", "");
input.focus();
});
},
destroy: function() {
this.wrapper.remove();
this.element.show();
$.Widget.prototype.destroy.call(this);
}
});
})(jQuery);
$(function() {
$("#combobox").combobox();
$("#toggle").click(function() {
$("#combobox").toggle();
});
});
Example: http://jsfiddle.net/gB32r/
jQuery 10有一些特性。我从jQuery UI的网站上获取了自动完成组合框：http://jqueryui.com/autocomplete/#combobox，并将其与Andrew Whitaker的答案进行了整合。
(function( $ ) {
$.widget( "custom.combobox_with_optgroup", {
_create: function() {
this.wrapper = $( "<span>" )
.addClass( "custom-combobox" )
.insertAfter( this.element );
this.element.hide();
this._createAutocomplete();
this._createShowAllButton();
},
_createAutocomplete: function() {
var selected = this.element.find( ":selected" ),
value = selected.val() ? selected.text() : "";
this.input = $( "<input>" )
.appendTo( this.wrapper )
.val( value )
.attr( "title", "" )
.addClass( "custom-combobox-input ui-widget ui-widget-content ui-state-default ui-corner-left" )
.autocomplete({
delay: 0,
minLength: 0,
source: $.proxy( this, "_source" )
})
.tooltip({
tooltipClass: "ui-state-highlight"
});
this._on( this.input, {
autocompleteselect: function( event, ui ) {
ui.item.option.selected = true;
this._trigger( "select", event, {
item: ui.item.option
});
},
autocompletechange: "_removeIfInvalid"
});
this.input.data("uiAutocomplete")._renderMenu = function(ul, items) {
var self = this,
currentCategory = "";
$.each(items, function(index, item) {
if (item.category != currentCategory) {
if (item.category) {
ul.append("<li class='custom-autocomplete-category'>" + item.category + "</li>");
}
currentCategory = item.category;
}
self._renderItemData(ul, item);
});
};
},
_createShowAllButton: function() {
var input = this.input,
wasOpen = false;
$( "<a>" )
.attr( "tabIndex", -1 )
.attr( "title", "Показать все" )
.tooltip()
.appendTo( this.wrapper )
.button({
icons: {
primary: "ui-icon-triangle-1-s"
},
text: false
})
.removeClass( "ui-corner-all" )
.addClass( "custom-combobox-toggle ui-corner-right" )
.mousedown(function() {
wasOpen = input.autocomplete( "widget" ).is( ":visible" );
})
.click(function() {
input.focus();
if ( wasOpen ) {
return;
}
input.autocomplete( "search", "" );
});
},
_source: function( request, response ) {
var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
response( this.element.find( "option" ).map(function() {
var text = $( this ).text();
if ( this.value && ( !request.term || matcher.test(text) ) )
return {
label: text,
value: text,
option: this,
category: $(this).closest("optgroup").attr("label")
};
}) );
},
_removeIfInvalid: function( event, ui ) {
if ( ui.item ) {
return;
}
var value = this.input.val(),
valueLowerCase = value.toLowerCase(),
valid = false;
this.element.find( "option" ).each(function() {
if ( $( this ).text().toLowerCase() === valueLowerCase ) {
this.selected = valid = true;
return false;
}
});
if ( valid ) {
return;
}
this.input
.val( "" )
.attr( "title", value + " не существует" )
.tooltip( "open" );
this.element.val( "" );
this._delay(function() {
this.input.tooltip( "close" ).attr( "title", "" );
}, 2500 );
this.input.data( "ui-autocomplete" ).term = "";
},
_destroy: function() {
this.wrapper.remove();
this.element.show();
}
});
})( jQuery );
_renderMenu: function( ul, items ) {
var self = this,
currentCategory = "";
$.each( items, function( index, item ) {
if ( item.category != currentCategory ) {
ul.append( "<li class='ui-autocomplete-category'>" + item.category + "</li>" );
currentCategory = item.category;
}
self._renderItem( ul, item );
});
}
_renderMenu: function( ul, items ) {
var self = this,
currentCategory = "";
$.each( items, function( index, item ) {
if ( item.parent.attr('label') != currentCategory ) {
ul.append( "<li class='ui-autocomplete-category'>" + item.parent.attr('label') + "</li>" );
currentCategory = item.parent.attr('label');
}
self._renderItem( ul, item );
});
}
items 数组中有什么。$.extend($.ui.menu.prototype.options, {
items: "> :not(.aureltime-autocomplete-category)"
});
children的调用更改为find。这样，在 postbacks（在 ASP.NET 的情况下）和其他情况下它都能正常工作。我本来想改变答案，但我认为公司网络正在阻止 ajax 或其他东西。此外，根据我的经验，您不必更改 _renderItem 方法。 - Peter