如何根据从 ajax 调用返回的数据动态地将选项添加到我的自动完成功能？
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【中文标题】如何根据从 ajax 调用返回的数据动态地将选项添加到我的自动完成功能？【英文标题】：How do I dynamically add options to my autocomplete based on data returned from an ajax call? 【发布时间】：2020-02-08 00:52:09 【问题描述】：我正在尝试实现在 jquery ui 网站上看到的自动完成组合框；但是，在他们的示例中，他们的 html 中有硬编码选项。我想运行一个从数据库返回值的 ajax 调用，然后用这些值填充组合框。有谁知道我如何最好地解决这个问题？
请看下面来自 jquery-ui 的示例代码
<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>jQuery UI Autocomplete - Combobox</title>
<link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
<link rel="stylesheet" href="/resources/demos/style.css">
<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 src="https://code.jquery.com/jquery-1.12.4.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
$( 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(
classes:
"ui-tooltip": "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" )
.on( "mousedown", function()
wasOpen = input.autocomplete( "widget" ).is( ":visible" );
)
.on( "click", function()
input.trigger( "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 )
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();
);
$( "#combobox" ).combobox();
$( "#toggle" ).on( "click", function()
$( "#combobox" ).toggle();
);
);
</script>
</head>
<body>
<div class="ui-widget">
<label>Your preferred programming language: </label>
<select id="combobox">
<option value="">Select one...</option>
<option value="ActionScript">ActionScript</option>
<option value="AppleScript">AppleScript</option>
<option value="Asp">Asp</option>
<option value="BASIC">BASIC</option>
<option value="C">C</option>
<option value="C++">C++</option>
<option value="Clojure">Clojure</option>
<option value="COBOL">COBOL</option>
<option value="ColdFusion">ColdFusion</option>
<option value="Erlang">Erlang</option>
<option value="Fortran">Fortran</option>
<option value="Groovy">Groovy</option>
<option value="Haskell">Haskell</option>
<option value="Java">Java</option>
<option value="javascript">JavaScript</option>
<option value="Lisp">Lisp</option>
<option value="Perl">Perl</option>
<option value="php">PHP</option>
<option value="Python">Python</option>
<option value="Ruby">Ruby</option>
<option value="Scala">Scala</option>
<option value="Scheme">Scheme</option>
</select>
</div>
<button id="toggle">Show underlying select</button>
</body>
</html>
【问题讨论】：
初始化组合框时可以使用source选项。
【参考方案1】：
- Remove the existing hardcoded <select id="combobox"> dropdown and add DIV continer <div id="combobox-data"></div>
- Remove the $( "#combobox" ).combobox();
- For the above example, Create a dropdown-values.cfm page with the below code Query
<select id="combobox">
<option value="">Select one...</option>
<cfoutput query="query">
<option value="Query.id">Query.name</option>
</cfoutput>
</select>
- Create a function and call the dropdown-values.cfm page using ajax
function dynamicDropDownValues()
$.ajax(
type: "POST",
url: "dropdown-values.cfm",
success: function(data)
$('#combobox-data').append(data);
$( "#combobox" ).combobox();
,
failure: function ()
alert("Failed!");
);
- The dynamicDropDownValues() call should be in DOM load ( $( function() dynamicDropDownValues() )
【讨论】：
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