根据用户输入值进行搜索和过滤，让用户快速找到并从预设值列表中选择。
如需了解更多有关 autocomplete 部件的细节，请查看 API 文档 自动完成部件（Autocomplete Widget）。
本章节使用到 search.php 下载。
默认功能
当您在输入域中输入时，自动完成（Autocomplete）部件提供相应的建议。在本实例中，提供了编程语言的建议选项，您可以输入 "ja" 知识兔，可以得到 Java 或 JavaScript。
数据源是一个简单的 JavaScript 数组，使用 source 选项提供给部件。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 默认功能</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <script> $(function() { var availableTags = [ "ActionScript", "AppleScript", "Asp", "BASIC", "C", "C++", "Clojure", "COBOL", "ColdFusion", "Erlang", "Fortran", "Groovy", "Haskell", "Java", "JavaScript", "Lisp", "Perl", "PHP", "Python", "Ruby", "Scala", "Scheme" ]; $( "#tags" ).autocomplete({ source: availableTags }); }); </script></head><body> <div class="ui-widget"> <label for="tags">标签：</label> <input id="tags"></div> </body></html>包含重音
autocomplete 域使用自定义的 source 选项来匹配带有重音字符的结果项，即使文本域不包含重音字符也会匹配。但是如果您在文本域中键入了重音字符，则不会显示非重音的结果项。
尝试键入 "Jo"，会看到 "John" 和 "Jörn"，然后 键入 "Jö"，只会看到 "Jörn"。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 包含重音</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <script> $(function() { var names = [ "Jörn Zaefferer", "Scott González", "John Resig" ]; var accentMap = { "á": "a", "ö": "o" }; var normalize = function( term ) { var ret = ""; for ( var i = 0; i < term.length; i++ ) { ret += accentMap[ term.charAt(i) ] || term.charAt(i); } return ret; }; $( "#developer" ).autocomplete({ source: function( request, response ) { var matcher = new RegExp( $.ui.autocomplete.escapeRegex( request.term ), "i" ); response( $.grep( names, function( value ) { value = value.label || value.value || value; return matcher.test( value ) || matcher.test( normalize( value ) ); }) ); } }); }); </script></head><body> <div class="ui-widget"> <form> <label for="developer">开发人员：</label> <input id="developer"> </form></div> </body></html>分类
分类的搜索结果。尝试键入 "a" 或 "n"。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 分类</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .ui-autocomplete-category { font-weight: bold; padding: .2em .4em; margin: .8em 0 .2em; line-height: 1.5; } </style> <script> $.widget( "custom.catcomplete", $.ui.autocomplete, { _renderMenu: function( ul, items ) { var that = this, currentCategory = ""; $.each( items, function( index, item ) { if ( item.category != currentCategory ) { ul.append( "<li class='ui-autocomplete-category'>" + item.category + "</li>" ); currentCategory = item.category; } that._renderItemData( ul, item ); }); } }); </script> <script> $(function() { var data = [ { label: "anders", category: "" }, { label: "andreas", category: "" }, { label: "antal", category: "" }, { label: "annhhx10", category: "Products" }, { label: "annk K12", category: "Products" }, { label: "annttop C13", category: "Products" }, { label: "anders andersson", category: "People" }, { label: "andreas andersson", category: "People" }, { label: "andreas johnson", category: "People" } ]; $( "#search" ).catcomplete({ delay: 0, source: data }); }); </script></head><body> <label for="search">搜索：</label><input id="search"> </body></html>组合框（Combobox）
一个由 Autocomplete 和 Button 创建的自定义部件。您可以键入一些字符，来获得基于您的输入过滤的结果，或者使用按钮从完整列表中选择。
该输入是从一个已有的 select 元素中读取，传递给带有自定义的 source 选项的 Autocomplete。
这是一个不被支持的不完美的部件。这里纯粹是为了演示 autocomplete 定制功能。如需了解更多有关该部件工作原理的细节，请点击这里查看相关的 jQuery 文章。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 组合框（Combobox）</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .custom-combobox { position: relative; display: inline-block; } .custom-combobox-toggle { position: absolute; top: 0; bottom: 0; margin-left: -1px; padding: 0; /* 支持： IE7 */ *height: 1.7em; *top: 0.1em; } .custom-combobox-input { margin: 0; padding: 0.3em; } </style> <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({ 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(); // 如果已经可见则关闭 if ( wasOpen ) { return; } // 传递空字符串作为搜索的值，显示所有的结果 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 ) { // 选择一项，不执行其他动作 if ( ui.item ) { return; } // 搜索一个匹配（不区分大小写） 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; } }); // 找到一个匹配，不执行其他动作 if ( valid ) { return; } // 移除无效的值 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.data( "ui-autocomplete" ).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"> <label>您喜欢的编程语言：</label> <select id="combobox"> <option value="">请选择...</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">显示基础的选择框</button> </body></html>自定义数据并显示
您可以使用自定义数据格式，并通过简单地重载默认的聚焦和选择行为来显示数据。
尝试键入 "j"，或者按向下箭头按键，即可得到一个项目列表。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 自定义数据并显示</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> #project-label { display: block; font-weight: bold; margin-bottom: 1em; } #project-icon { float: left; height: 32px; width: 32px; } #project-description { margin: 0; padding: 0; } </style> <script> $(function() { var projects = [ { value: "jquery", label: "jQuery", desc: "the write less, do more, JavaScript library", icon: "jquery_32x32.png" }, { value: "jquery-ui", label: "jQuery UI", desc: "the official user interface library for jQuery", icon: "jqueryui_32x32.png" }, { value: "sizzlejs", label: "Sizzle JS", desc: "a pure-JavaScript CSS selector engine", icon: "sizzlejs_32x32.png" } ]; $( "#project" ).autocomplete({ minLength: 0, source: projects, focus: function( event, ui ) { $( "#project" ).val( ui.item.label ); return false; }, select: function( event, ui ) { $( "#project" ).val( ui.item.label ); $( "#project-id" ).val( ui.item.value ); $( "#project-description" ).html( ui.item.desc ); $( "#project-icon" ).attr( "src", "images/" + ui.item.icon ); return false; } }) .data( "ui-autocomplete" )._renderItem = function( ul, item ) { return $( "<li>" ) .append( "<a>" + item.label + "<br>" + item.desc + "</a>" ) .appendTo( ul ); }; }); </script></head><body> <div id="project-label">选择一个项目（请键入 "j"）：</div><img id="project-icon" src="/images/2021/06/11/2021061104173996291210.png" class="ui-state-default" alt=""><input id="project"><input type="hidden" id="project-id"><p id="project-description"></p> </body></html>多个值
用法：键入一些字符，比如 "j"，可以看到相关的编程语言结果。选择一个值，然后继续键入字符来添加其他的值。
本实例演示如何使用 source 选项和一些事件来实现在一个单一的文本域输入多个自动完成的值。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 多个值</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <script> $(function() { var availableTags = [ "ActionScript", "AppleScript", "Asp", "BASIC", "C", "C++", "Clojure", "COBOL", "ColdFusion", "Erlang", "Fortran", "Groovy", "Haskell", "Java", "JavaScript", "Lisp", "Perl", "PHP", "Python", "Ruby", "Scala", "Scheme" ]; function split( val ) { return val.split( /,\s*/ ); } function extractLast( term ) { return split( term ).pop(); } $( "#tags" ) // 当选择一个条目时不离开文本域 .bind( "keydown", function( event ) { if ( event.keyCode === $.ui.keyCode.TAB && $( this ).data( "ui-autocomplete" ).menu.active ) { event.preventDefault(); } }) .autocomplete({ minLength: 0, source: function( request, response ) { // 回到 autocomplete，但是提取最后的条目 response( $.ui.autocomplete.filter( availableTags, extractLast( request.term ) ) ); }, focus: function() { // 防止在获得焦点时插入值 return false; }, select: function( event, ui ) { var terms = split( this.value ); // 移除当前输入 terms.pop(); // 添加被选项 terms.push( ui.item.value ); // 添加占位符，在结尾添加逗号+空格 terms.push( "" ); this.value = terms.join( ", " ); return false; } }); }); </script></head><body> <div class="ui-widget"> <label for="tags">编程语言：</label> <input id="tags" size="50"></div> </body></html>多个值，远程
用法：键入至少两个字符来获取鸟的名称。选择一个值，然后继续键入字符来添加其他的值。
本实例演示如何使用 source 选项和一些事件来实现在一个单一的文本域输入多个自动完成的值。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 多个值，远程</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .ui-autocomplete-loading { background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat; } </style> <script> $(function() { function split( val ) { return val.split( /,\s*/ ); } function extractLast( term ) { return split( term ).pop(); } $( "#birds" ) // 当选择一个条目时不离开文本域 .bind( "keydown", function( event ) { if ( event.keyCode === $.ui.keyCode.TAB && $( this ).data( "ui-autocomplete" ).menu.active ) { event.preventDefault(); } }) .autocomplete({ source: function( request, response ) { $.getJSON( "search.php", { term: extractLast( request.term ) }, response ); }, search: function() { // 自定义最小长度 var term = extractLast( this.value ); if ( term.length < 2 ) { return false; } }, focus: function() { // 防止在获得焦点时插入值 return false; }, select: function( event, ui ) { var terms = split( this.value ); // 移除当前输入 terms.pop(); // 添加被选项 terms.push( ui.item.value ); // 添加占位符，在结尾添加逗号+空格 terms.push( "" ); this.value = terms.join( ", " ); return false; } }); }); </script></head><body> <div class="ui-widget"> <label for="birds">鸟：</label> <input id="birds" size="50"></div> </body></html>远程 JSONP 数据源
用法：键入至少两个字符来获取鸟的名称。选择一个值，然后继续键入字符来添加其他的值。
本实例演示如何使用 jsonp 来获取数据。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <title>jQuery UI Autocomplete - Remote JSONP datasource</title> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .ui-autocomplete-loading { background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat; } </style> <script src="/images/2021/06/11/2021061104173999286215.js"></script> <script src="/images/2021/06/11/202106110417403159716.js"></script> <script> $( function() { function log( message ) { $( "<div>" ).text( message ).prependTo( "#log" ); $( "#log" ).scrollTop( 0 ); } $( "#birds" ).autocomplete({ source: function( request, response ) { $.ajax( { url: "/try/jqueryui/search.php", dataType: "jsonp", data: { term: request.term }, success: function( data ) { response( data ); } } ); }, minLength: 2, select: function( event, ui ) { log( "Selected: " + ui.item.value + " aka " + ui.item.id ); } } ); } ); </script></head><body> <div class="ui-widget"> <label for="birds">Birds: </label> <input id="birds"></div> <div class="ui-widget" style="margin-top:2em; font-family:Arial"> Result: <div id="log" style="height: 200px; width: 300px; overflow: auto;" class="ui-widget-content"></div></div> </body></html>远程数据源
当您在文本域中键入字符时，Autocomplete 部件给出建议结果。在本实例中，当您在文本域中至少键入两个字符时，将显示相关鸟的名称。
在本实例中，数据源是可返回 JSON 数据的服务器端脚本，通过一个简单的 source 选项来指定。另外，minLength 选项设置为 2，避免查询返回太多的结果，select 事件用于显示一些反馈。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 远程数据源</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .ui-autocomplete-loading { background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat; } </style> <script> $(function() { function log( message ) { $( "<div>" ).text( message ).prependTo( "#log" ); $( "#log" ).scrollTop( 0 ); } $( "#birds" ).autocomplete({ source: "search.php", minLength: 2, select: function( event, ui ) { log( ui.item ? "Selected: " + ui.item.value + " aka " + ui.item.id : "Nothing selected, input was " + this.value ); } }); }); </script></head><body> <div class="ui-widget"> <label for="birds">鸟：</label> <input id="birds"></div> <div class="ui-widget" style="margin-top:2em; font-family:Arial"> 结果： <div id="log" style="height: 200px; width: 300px; overflow: auto;" class="ui-widget-content"></div></div> </body></html>远程缓存
当您在文本域中键入字符时，Autocomplete 部件给出建议结果。在本实例中，当您在文本域中至少键入两个字符时，将显示相关鸟的名称。
为了提高性能，这里添加了一些本地缓存，其他与远程数据源实例相似。在这里，缓存只保存了一个查询，并可以扩展到缓存多个值，每个条目一个值。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 远程缓存</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .ui-autocomplete-loading { background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat; } </style> <script> $(function() { var cache = {}; $( "#birds" ).autocomplete({ minLength: 2, source: function( request, response ) { var term = request.term; if ( term in cache ) { response( cache[ term ] ); return; } $.getJSON( "search.php", request, function( data, status, xhr ) { cache[ term ] = data; response( data ); }); } }); }); </script></head><body> <div class="ui-widget"> <label for="birds">鸟：</label> <input id="birds"></div> </body></html>可滚动的结果
当显示一个长列表的选项时，您可以简单地为 autocomplete 菜单设置 max-height 来防止菜单显示太长。尝试键入 "a" 或 "s" 来获得一个可滚动的长列表的结果。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - 可滚动的结果</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .ui-autocomplete { max-height: 100px; overflow-y: auto; /* 防止水平滚动条 */ overflow-x: hidden; } /* IE 6 不支持 max-height * 我们使用 height 代替，但是这会强制菜单总是显示为那个高度 */ * html .ui-autocomplete { height: 100px; } </style> <script> $(function() { var availableTags = [ "ActionScript", "AppleScript", "Asp", "BASIC", "C", "C++", "Clojure", "COBOL", "ColdFusion", "Erlang", "Fortran", "Groovy", "Haskell", "Java", "JavaScript", "Lisp", "Perl", "PHP", "Python", "Ruby", "Scala", "Scheme" ]; $( "#tags" ).autocomplete({ source: availableTags }); }); </script></head><body> <div class="ui-widget"> <label for="tags">标签：</label> <input id="tags"></div> </body></html>XML 数据
本实例演示如何获取一些 XML 数据，并使用 jQuery 的方法解析它，然后把它提供给 autocomplete 作为数据源。
本实例也可作为解析远程 XML 数据源的参考 - 解析在每次 source 回调请求时发生。
<!doctype html><html lang="en"><head> <meta charset="utf-8"> <title>jQuery UI 自动完成（Autocomplete） - XML 数据</title> <link rel="stylesheet" href="https://zhishitu.com/"> <script src="/images/2021/06/11/202106110417399610450.js"></script> <script src="/images/2021/06/11/202106110417399613311.js"></script> <link rel="stylesheet" href="https://zhishitu.com/"> <style> .ui-autocomplete-loading { background: white url('/try/jqueryui/ui-anim_basic_16x16.gif') right center no-repeat; } </style> <script> $(function() { function log( message ) { $( "<div/>" ).text( message ).prependTo( "#log" ); $( "#log" ).attr( "scrollTop", 0 ); } $.ajax({ url: "/try/jqueryui/london.xmllondon.xml", dataType: "xml", success: function( xmlResponse ) { var data = $( "geoname", xmlResponse ).map(function() { return { value: $( "name", this ).text() + ", " + ( $.trim( $( "countryName", this ).text() ) || "(unknown country)" ), id: $( "geonameId", this ).text() }; }).get(); $( "#birds" ).autocomplete({ source: data, minLength: 0, select: function( event, ui ) { log( ui.item ? "Selected: " + ui.item.value + ", geonameId: " + ui.item.id : "Nothing selected, input was " + this.value ); } }); } }); }); </script></head><body> <div class="ui-widget"> <label for="birds">London 匹配：</label> <input id="birds"></div> <div class="ui-widget" style="margin-top:2em; font-family:Arial"> 结果： <div id="log" style="height: 200px; width: 300px; overflow: auto;" class="ui-widget-content"></div></div> </body></html>