2019独角兽企业重金招聘Python工程师标准>>> 
看效果：
不多说了，上代码了
Jquery实现仿搜索引擎文本框自动补全插件 - Jquery-school
仿百度首页搜索提示框效果
(function($){
var bigAutocomplete = new function(){
this.currentInputText = null;//目前获得光标的输入框（解决一个页面多个输入框绑定自动补全功能）
this.functionalKeyArray = [9,20,13,16,17,18,91,92,93,45,36,33,34,35,37,39,112,113,114,115,116,117,118,119,120,121,122,123,144,19,145,40,38,27];//键盘上功能键键值数组
this.holdText = null;//输入框中原始输入的内容
//初始化插入自动补全div，并在document注册mousedown，点击非div区域隐藏div
this.init = function(){
$("body").append("");
$(document).bind('mousedown',function(event){
var $target = $(event.target);
if((!($target.parents().andSelf().is('#bigAutocompleteContent'))) && (!$target.is(bigAutocomplete.currentInputText))){
bigAutocomplete.hideAutocomplete();
}
})
//鼠标悬停时选中当前行
$("#bigAutocompleteContent").delegate("tr", "mouseover", function() {
$("#bigAutocompleteContent tr").removeClass("ct");
$(this).addClass("ct");
}).delegate("tr", "mouseout", function() {
$("#bigAutocompleteContent tr").removeClass("ct");
});
//单击选中行后，选中行内容设置到输入框中，并执行callback函数
$("#bigAutocompleteContent").delegate("tr", "click", function() {
bigAutocomplete.currentInputText.val( $(this).find("div:last").html());
var callback_ = bigAutocomplete.currentInputText.data("config").callback;
if($("#bigAutocompleteContent").css("display") != "none" && callback_ && $.isFunction(callback_)){
callback_($(this).data("jsonData"));
}
bigAutocomplete.hideAutocomplete();
})
}
this.autocomplete = function(param){
if($("body").length > 0 && $("#bigAutocompleteContent").length <= 0){
bigAutocomplete.init();//初始化信息
}
var $this = $(this);//为绑定自动补全功能的输入框jquery对象
var $bigAutocompleteContent = $("#bigAutocompleteContent");
this.config = {
//width:下拉框的宽度，默认使用输入框宽度
width:$this.outerWidth() - 2,
//url：格式url:""用来ajax后台获取数据，返回的数据格式为data参数一样
url:null,
/*data：格式{data:[{title:null,result:{}},{title:null,result:{}}]}
url和data参数只有一个生效，data优先*/
data:null,
//callback：选中行后按回车或单击时回调的函数
callback:null};
$.extend(this.config,param);
$this.data("config",this.config);
//输入框keydown事件
$this.keydown(function(event) {
switch (event.keyCode) {
case 40://向下键
if($bigAutocompleteContent.css("display") == "none")return;
var $nextSiblingTr = $bigAutocompleteContent.find(".ct");
if($nextSiblingTr.length <= 0){//没有选中行时，选中第一行
$nextSiblingTr = $bigAutocompleteContent.find("tr:first");
}else{
$nextSiblingTr = $nextSiblingTr.next();
}
$bigAutocompleteContent.find("tr").removeClass("ct");
if($nextSiblingTr.length > 0){//有下一行时（不是最后一行）
$nextSiblingTr.addClass("ct");//选中的行加背景
$this.val($nextSiblingTr.find("div:last").html());//选中行内容设置到输入框中
//div滚动到选中的行,jquery-1.6.1 $nextSiblingTr.offset().top 有bug，数值有问题
$bigAutocompleteContent.scrollTop($nextSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $nextSiblingTr.height() );
}else{
$this.val(bigAutocomplete.holdText);//输入框显示用户原始输入的值
}
break;
case 38://向上键
if($bigAutocompleteContent.css("display") == "none")return;
var $previousSiblingTr = $bigAutocompleteContent.find(".ct");
if($previousSiblingTr.length <= 0){//没有选中行时，选中最后一行行
$previousSiblingTr = $bigAutocompleteContent.find("tr:last");
}else{
$previousSiblingTr = $previousSiblingTr.prev();
}
$bigAutocompleteContent.find("tr").removeClass("ct");
if($previousSiblingTr.length > 0){//有上一行时（不是第一行）
$previousSiblingTr.addClass("ct");//选中的行加背景
$this.val($previousSiblingTr.find("div:last").html());//选中行内容设置到输入框中
//div滚动到选中的行,jquery-1.6.1 $$previousSiblingTr.offset().top 有bug，数值有问题
$bigAutocompleteContent.scrollTop($previousSiblingTr[0].offsetTop - $bigAutocompleteContent.height() + $previousSiblingTr.height());
}else{
$this.val(bigAutocomplete.holdText);//输入框显示用户原始输入的值
}
break;
case 27://ESC键隐藏下拉框
bigAutocomplete.hideAutocomplete();
break;
}
});
//输入框keyup事件
$this.keyup(function(event) {
var k = event.keyCode;
var ctrl = event.ctrlKey;
var isFunctionalKey = false;//按下的键是否是功能键
for(var i=0;i -1){
data_.push(data[i]);
}
}
makeContAndShow(data_);
}else if(url != null && url != ""){//ajax请求数据
$.post(url,{keyword:keyword_},function(result){
makeContAndShow(result.data)
},"json")
}
bigAutocomplete.holdText = $this.val();
}
//回车键
if(k == 13){
var callback_ = $this.data("config").callback;
if($bigAutocompleteContent.css("display") != "none"){
if(callback_ && $.isFunction(callback_)){
callback_($bigAutocompleteContent.find(".ct").data("jsonData"));
}
$bigAutocompleteContent.hide();
}
}
});
//组装下拉框html内容并显示
function makeContAndShow(data_){
if(data_ == null || data_.length <=0 ){
return;
}
var cont = "";
for(var i=0;i"
}
cont += "
";
$bigAutocompleteContent.html(cont);
$bigAutocompleteContent.show();
//每行tr绑定数据，返回给回调函数
$bigAutocompleteContent.find("tr").each(function(index){
$(this).data("jsonData",data_[index]);
})
}
//输入框focus事件
$this.focus(function(){
bigAutocomplete.currentInputText = $this;
});
}
//隐藏下拉框
this.hideAutocomplete = function(){
var $bigAutocompleteContent = $("#bigAutocompleteContent");
if($bigAutocompleteContent.css("display") != "none"){
$bigAutocompleteContent.find("tr").removeClass("ct");
$bigAutocompleteContent.hide();
}
}
};
$.fn.bigAutocomplete = bigAutocomplete.autocomplete;
})(jQuery) jquery.bigautocomplete.css
@charset "utf-8";
.bigautocomplete-layout{display:none;background-color:#FFFFFF;border:1px solid #BCBCBC;position:absolute;z-index:100;max-height:220px;overflow-x:hidden;overflow-y:auto; }
.bigautocomplete-layout table{border-collapse:collapse;border-spacing:0;background:none repeat scroll 0 0 #FFFFFF;width:100%;cursor:default;}
.bigautocomplete-layout table tr{background:none repeat scroll 0 0 #FFFFFF;}
.bigautocomplete-layout .ct{background:none repeat scroll 0 0 #D2DEE8 !important;}
.bigautocomplete-layout div{word-wrap:break-word;word-break:break-all;padding:1px 5px;}