下面是jQuery自动完成代码，它显示了一些样式的结果 。如何删除所有样式属性，使其看起来像原始html下拉列表？如果不可能，可以在纯JavaScript中创建相同的自动完成效果吗？
现有代码：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Autocomplete - Combobox</title>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<style>
.custom-combobox {
position: relative;
display: inline-block;
}
.custom-combobox-toggle {
position: absolute;
top: 0;
bottom: 0;
margin-left: -1px;
padding: 0;
}
.custom-combobox-input {
margin: 0;
padding: 5px 10px;
}
</style>
<script>
function sendvalues()
{
alert();
}
(function( $ ) {
$.widget( "custom.combobox", {
_create: function() {
this.wrapper = $( "<span>" )
.addClass( "custom-combobox" )
.insertAfter( this.element );
this.element.hide();
this._createAutocomplete();
this._createShowAllButton();
},
_createAutocomplete: function() {
var selected = this.element.children( ":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"
});
},
_createShowAllButton: function() {
var input = this.input,
wasOpen = false;
$( "<a>" )
.attr( "tabIndex", -1 )
.attr( "title", "Show All Items" )
.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();
// Close if already visible
if ( wasOpen ) {
return;
}
// Pass empty string as value to search for, displaying all results
input.autocomplete( "search", "" );
});
},
_source: function( request, response ) {
var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
response( this.element.children( "option" ).map(function() {
var text = $( this ).text();
if ( this.value && ( !request.term || matcher.test(text) ) )
return {
label: text,
value: text,
option: this
};
}) );
},
_removeIfInvalid: function( event, ui ) {
// Selected an item, nothing to do
if ( ui.item ) {
sendvalues();
return;
}
// Search for a match (case-insensitive)
var value = this.input.val(),
valueLowerCase = value.toLowerCase(),
valid = false;
this.element.children( "option" ).each(function() {
if ( $( this ).text().toLowerCase() === valueLowerCase ) {
this.selected = valid = true;
return false;
}
});
// Found a match, nothing to do
if ( valid ) {
return;
}
// Remove invalid value
this.input
.val( "" )
.attr( "title", value + " didn't match any item" )
.tooltip( "open" );
this.element.val( "" );
this._delay(function() {
this.input.tooltip( "close" ).attr( "title", "" );
}, 2500 );
this.input.autocomplete( "instance" ).term = "";
},
_destroy: function() {
this.wrapper.remove();
this.element.show();
}
});
})( jQuery );
$(function() {
$( "#combobox" ).combobox();
$( "#toggle" ).click(function() {
$( "#combobox" ).toggle();
});
});
</script>
</head>
<body>
<div class="ui-widget">
<select id="combobox" onchange="sendvalues()">
<option value="">Select one...</option>
<option value="abc">abc</option>
<option value="kkk">kkk</option>
<option value="sd">asf</option>
<option value="abdfac">abasdfsac</option>
<option value="kgfjkgkk">kkyk</option>
<option value="sghkd">asgyjf</option>
<option value="abyuic">abftfjvhjc</option>
<option value="kkkgyjhk">kkgjk</option>
<option value="sml,hud">asnjmf</option>
</select>
</div>
</body>
</html>
当我刚删除css导入时，整个功能发生了变化。该值显示在列表中的组合框下方，选择的值显示为separetely，没有向下箭头。
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Autocomplete - Combobox</title>
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<style>
.custom-combobox {
position: relative;
display: inline-block;
}
.custom-combobox-toggle {
position: absolute;
top: 0;
bottom: 0;
margin-left: -1px;
padding: 0;
}
.custom-combobox-input {
margin: 0;
padding: 5px 10px;
}
</style>
<script>
function sendvalues()
{
alert();
}
(function( $ ) {
$.widget( "custom.combobox", {
_create: function() {
this.wrapper = $( "<span>" )
.addClass( "custom-combobox" )
.insertAfter( this.element );
this.element.hide();
this._createAutocomplete();
this._createShowAllButton();
},
_createAutocomplete: function() {
var selected = this.element.children( ":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"
});
},
_createShowAllButton: function() {
var input = this.input,
wasOpen = false;
$( "<a>" )
.attr( "tabIndex", -1 )
.attr( "title", "Show All Items" )
.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();
// Close if already visible
if ( wasOpen ) {
return;
}
// Pass empty string as value to search for, displaying all results
input.autocomplete( "search", "" );
});
},
_source: function( request, response ) {
var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
response( this.element.children( "option" ).map(function() {
var text = $( this ).text();
if ( this.value && ( !request.term || matcher.test(text) ) )
return {
label: text,
value: text,
option: this
};
}) );
},
_removeIfInvalid: function( event, ui ) {
// Selected an item, nothing to do
if ( ui.item ) {
sendvalues();
return;
}
// Search for a match (case-insensitive)
var value = this.input.val(),
valueLowerCase = value.toLowerCase(),
valid = false;
this.element.children( "option" ).each(function() {
if ( $( this ).text().toLowerCase() === valueLowerCase ) {
this.selected = valid = true;
return false;
}
});
// Found a match, nothing to do
if ( valid ) {
return;
}
// Remove invalid value
this.input
.val( "" )
.attr( "title", value + " didn't match any item" )
.tooltip( "open" );
this.element.val( "" );
this._delay(function() {
this.input.tooltip( "close" ).attr( "title", "" );
}, 2500 );
this.input.autocomplete( "instance" ).term = "";
},
_destroy: function() {
this.wrapper.remove();
this.element.show();
}
});
})( jQuery );
$(function() {
$( "#combobox" ).combobox();
$( "#toggle" ).click(function() {
$( "#combobox" ).toggle();
});
});
</script>
</head>
<body>
<div class="ui-widget">
<select id="combobox" onchange="sendvalues()">
<option value="">Select one...</option>
<option value="abc">abc</option>
<option value="kkk">kkk</option>
<option value="sd">asf</option>
<option value="abdfac">abasdfsac</option>
<option value="kgfjkgkk">kkyk</option>
<option value="sghkd">asgyjf</option>
<option value="abyuic">abftfjvhjc</option>
<option value="kkkgyjhk">kkgjk</option>
<option value="sml,hud">asnjmf</option>
</select>
</div>
</body>
</html>
答案 0 :(得分：1)
你不能“删除所有的样式，使它看起来像一个原始的html下拉列表”。您必须添加或修改样式，使其看起来像您想要的那样。
删除CSS时看起来不正确的原因是您使用复杂的插件来处理复杂的行为。如果删除插件的任何部分（特别是像CSS这样的大部分），整个“机器”将会中断。
您需要做的是添加一些自己的样式来覆盖插件的样式，或者改变插件使用的样式。
在我看来，这看起来与“自然”自动完成框看起来的方式之间的最大区别在于，此框具有浅灰色背景渐变。如果右键单击该元素并选择“inspect element”，您将看到影响它的所有CSS规则。您只需要找到导致它具有该背景的规则。
在这种情况下，任何具有类ui-state-default的元素都应该具有背景图像images/ui-bg_glass_75_e6e6e6_1x400.png，并且该规则来自jquery-ui.css，位于第866行。所以你可以要么找到css规则并修改它以满足您的需要，要么您可以引入自己的样式表并覆盖此样式。
然后对每个需要做的小改动继续执行该程序：inspect element;找到适合它的规则;更改或覆盖规则。 （我建议覆盖而不是改变一般原则，以减少你打破插件的可能性）
希望这会有所帮助。如果您需要进一步的帮助，请评论或编辑您的帖子。
答案 1 :(得分：0)
试试这个
JsFiddle : [https://jsfiddle.net/kd57ebj7/][1]
使用你的html和一些css。
答案 2 :(得分：0)
以下样式属性解决了该问题。
<style>
.custom-combobox {
position: relative;
display: inline-block;
}
.custom-combobox-toggle {
position: absolute;
top: 0;
bottom: 0;
margin-left: -1px;
padding: 0;
height:17px;
background:transparent;
border-radius:0px;
}
.custom-combobox-input {
margin: 0;
padding: 0px 0px;
width:150px;height:17px;
background:transparent;
border-radius:0px;
}
.ui-menu .ui-menu-item {
position: relative;
margin: 0;
padding: 0px 0em 0px 0em;
cursor: pointer;
min-height: 0;
background:transparent;
}
</style>
最终代码：
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>jQuery UI Autocomplete - Combobox</title>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="https://code.jquery.com/jquery-1.10.2.js"></script>
<script src="https://code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<style>
.custom-combobox {
position: relative;
display: inline-block;
}
.custom-combobox-toggle {
position: absolute;
top: 0;
bottom: 0;
margin-left: -1px;
padding: 0;
height:17px;
background:transparent;
border-radius:0px;
}
.custom-combobox-input {
margin: 0;
padding: 0px 0px;
width:150px;height:17px;
background:transparent;
border-radius:0px;
}
.ui-menu .ui-menu-item {
position: relative;
margin: 0;
padding: 0px 0em 0px 0em;
cursor: pointer;
min-height: 0;
background:transparent;
}
</style>
<script>
function sendvalues()
{
alert();
}
function combo()
{
alert();
$( ".combobox" ).combobox();
}
(function( $ ) {
$.widget( "custom.combobox", {
_create: function() {
this.wrapper = $( "<span>" )
.addClass( "custom-combobox" )
.insertAfter( this.element );
this.element.hide();
this._createAutocomplete();
this._createShowAllButton();
},
_createAutocomplete: function() {
var selected = this.element.children( ":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"
});
},
_createShowAllButton: function() {
var input = this.input,
wasOpen = false;
$( "<a>" )
.attr( "tabIndex", -1 )
.attr( "title", "Show All Items" )
.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();
// Close if already visible
if ( wasOpen ) {
return;
}
// Pass empty string as value to search for, displaying all results
input.autocomplete( "search", "" );
});
},
_source: function( request, response ) {
var matcher = new RegExp( $.ui.autocomplete.escapeRegex(request.term), "i" );
response( this.element.children( "option" ).map(function() {
var text = $( this ).text();
if ( this.value && ( !request.term || matcher.test(text) ) )
return {
label: text,
value: text,
option: this
};
}) );
},
_removeIfInvalid: function( event, ui ) {
// Selected an item, nothing to do
if ( ui.item ) {
sendvalues();
return;
}
// Search for a match (case-insensitive)
var value = this.input.val(),
valueLowerCase = value.toLowerCase(),
valid = false;
this.element.children( "option" ).each(function() {
if ( $( this ).text().toLowerCase() === valueLowerCase ) {
this.selected = valid = true;
return false;
}
});
// Found a match, nothing to do
if ( valid ) {
return;
}
// Remove invalid value
this.input
.val( "" )
.attr( "title", value + " didn't match any item" )
.tooltip( "open" );
this.element.val( "" );
this._delay(function() {
this.input.tooltip( "close" ).attr( "title", "" );
}, 2500 );
this.input.autocomplete( "instance" ).term = "";
},
_destroy: function() {
this.wrapper.remove();
this.element.show();
}
});
})( jQuery );
$(function() {
$( ".combobox" ).combobox();
$( "#toggle" ).click(function() {
$( ".combobox" ).toggle();
});
});
</script>
</head>
<body>
<script>
function loada()
{
document.getElementById("two").innerHTML=document.getElementById("one").innerHTML;
}
</script>
<div id="one">
<select class="combobox" id="one" onchange="sendvalues()" onload="combo()">
<option value="">Select one...</option>
<option value="abc">abc</option>
<option value="kkk">kkk</option>
<option value="sd">asf</option>
<option value="abdfac">abasdfsac</option>
<option value="kgfjkgkk">kkyk</option>
<option value="sghkd">asgyjf</option>
<option value="abyuic">abftfjvhjc</option>
<option value="kkkgyjhk">kkgjk</option>
<option value="sml,hud">asnjmf</option>
</select>
</div>
</div>
</body>
</html>