Javascript 递归上一个和下一个箭头键,使用jquery按自定义自动完成
我已经开发了定制自动完成,它在页面中的数据提取和显示方面工作良好。我想加强它。我想在按下向下/向上箭头键时,在自动完成的下一个和上一个li上选择或设置焦点。这是我的jquery代码,它填充了自动完成Javascript 递归上一个和下一个箭头键,使用jquery按自定义自动完成,javascript,jquery,html,autocomplete,Javascript,Jquery,Html,Autocomplete,我已经开发了定制自动完成,它在页面中的数据提取和显示方面工作良好。我想加强它。我想在按下向下/向上箭头键时,在自动完成的下一个和上一个li上选择或设置焦点。这是我的jquery代码,它填充了自动完成 $("input[data-tg-autocomplete]").keyup(function (e) { if (e.keyCode == 40 || e.keyCode == 38) { //alert(e.keyCode); DownUpKeyPre
$("input[data-tg-autocomplete]").keyup(function (e) {
if (e.keyCode == 40 || e.keyCode == 38) {
//alert(e.keyCode);
DownUpKeyPress(e.keyCode);
}
else {
var $input = $(this);
//-----------------------------Allowing user to enter atleast one character for auto search
if ($input.val().length > 0) {
var request = $.ajax({
url: $input.attr("data-tg-autocomplete"),
method: "GET",
data: { term: $input.val() },
dataType: "json"
});
request.done(function (JsonData) {
LoadAutoSuggest(JsonData);
});
request.fail(function (jqXHR, textStatus) {
//alert("Request failed: " + textStatus);
});
}
}
});
//========================populate autocomplete
function LoadAutoSuggest(result) {
var tag = "";
$('.custom-autocomplete').html("");
if (result.Destination != undefined) {
tag = tag + "<li class=''>";
tag = tag + "<a href='#' class='list-group-item active disabled AutoCompleteHeader'>";
tag = tag + "Destination";
tag = tag + "</a>";
tag = tag + "</li>";
for (i = 0; i < result.Destination.length - 1; i++) {
tag = tag + "<li class='list-group-item'>";
tag = tag + "<a class='autocompleteListItem' data-type='Destination' data-id='" + result.Destination[i].DestinationID + "'>";
tag = tag + "<div>";
tag = tag + result.Destination[i].DestinationName;
// tag = tag + "<span class='pull-right badge'>14</span>";
tag = tag + "</div>";
tag = tag + "</a>";
tag = tag + "</li>";
}
}
if (result.Business != undefined) {
tag = tag + "<li class=''>";
tag = tag + "<a href='#' class='list-group-item active disabled AutoCompleteHeader'>";
tag = tag + "Business";
tag = tag + "</a>";
tag = tag + " </li>";
for (i = 0; i < result.Business.length - 1; i++) {
tag = tag + "<li class='list-group-item'>";
tag = tag + "<a class='autocompleteListItem' data-type='Business' data-id='" + result.Business[i].BusinessID + "'>";
tag = tag + "<div>";
tag = tag + result.Business[i].BusinessName;
// tag = tag + "<span class='pull-right badge'>14</span>";
tag = tag + "</div>";
tag = tag + "</a>";
tag = tag + "</li>";
//alert(result.Business[i].BusinessName + " ID = " + result.Business[i].BusinessID)
}
}
$('.custom-autocomplete').html(tag);
$('.autocompleteListItem').click(function () {
var id = $(this).attr("data-id");
var type = $(this).attr("data-type");
var text = $(this).text();
$("#searchtext").val(text);
$('.HiddenSearchInput #id').val(id);
$('.HiddenSearchInput #type').val(type);
$('.custom-autocomplete').html("");
$('.Search-submit').trigger("click");
});
$(':not(".search-wrapper")').click(function () {
if ($('.custom-autocomplete li').length > 0) {
$('.custom-autocomplete').html("");
}
});
$('.custom-autocomplete li.list-group-item').first().addClass("focused");
}
function DownUpKeyPress(keyCode) {
//$this = $(this);
if (keyCode == 40) {
// alert('40');
// $this.next().focus();
if ($('.custom-autocomplete li').length > 0) {
var $focused = $('.custom-autocomplete li.focused');
$('.custom-autocomplete li.focused ~ .list-group-item').first().addClass('focused')
$focused.removeClass('focused')
}
return false;
} else if (keyCode == 38) {
//alert('38');
// $this.prev().focus();
if ($('.custom-autocomplete li').length > 0) {
}
return false;
}
}
$(“输入[数据tg自动完成]”).keyup(函数(e){
如果(e.keyCode==40 | | e.keyCode==38){
//警报(如钥匙代码);
向下上按键(如按键代码);
}
否则{
var$input=$(此);
//-----------------------------允许用户输入至少一个字符进行自动搜索
如果($input.val().length>0){
var请求=$.ajax({
url:$input.attr(“数据tg自动完成”),
方法:“获取”,
数据:{term:$input.val()},
数据类型:“json”
});
request.done(函数(JsonData){
LoadAutoSuggest(JsonData);
});
请求失败(函数(jqXHR,textStatus){
//警报(“请求失败:+textStatus”);
});
}
}
});
//========================================填充自动完成
函数LoadAutoSuggest(结果){
var tag=“”;
$('.custom autocomplete').html(“”);
if(result.Destination!=未定义){
tag=tag+“”;
标签=标签+“”;
标签=标签+“ ”;
对于(i=0;i”;
标签=标签+“”;
标签=标签+“”;
对于(i=0;i”;
标签=标签+“”;
标签=标签+“”;
tag=tag+result.Business[i].BusinessName;
//标签=标签+“14”;
标签=标签+“”;
标签=标签+“”;
标签=标签+“”;
//警报(result.Business[i].BusinessName+“ID=“+result.Business[i].BusinessID))
}
}
$('.custom autocomplete').html(标记);
$('.autocompletestitem')。单击(函数(){
var id=$(this.attr(“数据id”);
var type=$(this.attr(“数据类型”);
var text=$(this.text();
$(“#搜索文本”).val(文本);
$('.HiddenSearchInput#id').val(id);
$('.HiddenSearchInput#type').val(type);
$('.custom autocomplete').html(“”);
$('.Search submit')。触发器(“单击”);
});
$(':不是(“.search wrapper”)。单击(函数(){
如果($('.custom autocomplete li')。长度>0){
$('.custom autocomplete').html(“”);
}
});
$('.custom autocomplete li.list group item').first().addClass(“聚焦”);
}
功能DownUpKeyPress(按键代码){
//$this=$(this);
如果(键代码==40){
//警报(“40”);
//$this.next().focus();
如果($('.custom autocomplete li')。长度>0){
var$focused=$('.custom autocomplete li.focused');
$('.custom autocomplete li.focused~.list group item').first().addClass('focused'))
$focused.removeClass('focused')
}
返回false;
}else if(keyCode==38){
//警报(“38”);
//$this.prev().focus();
如果($('.custom autocomplete li')。长度>0){
}
返回false;
}
}
这是我的html,我在这里填充自动完成
<div class="Search-container">
<span class="error search-validation"></span>
<div class="input-group input-group-lg">
<input id="searchtext" name="searchtext" type="text" class="form-control " placeholder="Find travel agents, search travel agents in your destination" data-tg-autocomplete="@Url.Action("AutocompleteBusiness")" />
<span class="input-group-btn">
<button class="btn btn-primary Search-submit" type="submit">
<span class="glyphicon glyphicon-search"></span>
</button>
</span>
</div><!-- /input-group -->
<div class="displaynone HiddenSearchInput">
<input type="hidden" id="id" name="id" value="" />
<input type="hidden" id="type" name="type" value="" />
</div>
</div>
<ul class="list-group custom-autocomplete">
@*List will be populated from ajax call in function LoadAutoSuggest*@
</ul>
@*列表将从函数LoadAutoSuggest中的ajax调用填充*@
我的功能
DownUpKeyPress
用于设置下一个和上一个li的焦点。焦点li项将用于站点搜索,但当按下上/下箭头时,我无法设置下一个和上一个li的焦点。我使用MVC5开发我的项目。可能我对jquery有错误。有人可以帮我解决这个问题吗。我不想为此使用任何插件。在DownUpKeyPress
// for up arrow => Previous Li Focus
if (keyCode == 40) {
if ($('.custom-autocomplete li').length > 0) {
var oBox = $('.custom-autocomplete > .list-group-item.focused').next('li');
var curClass = oBox.attr("class");
if (oBox.length == 0) {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused');
$('.custom-autocomplete > .list-group-item').first().addClass('focused');
}
else if (curClass == "") {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').next('li').next('li').addClass('focused');
}
else {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').next('li').addClass('focused');
}
}
return false;
}
// for down arrow => Next Li Focus
else if (keyCode == 38) {
if ($('.custom-autocomplete li').length > 0) {
var oBox = $('.custom-autocomplete > .list-group-item.focused').prev('li');
var curClass = oBox.attr("class");
if (oBox.length == 0) {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused');
$('.custom-autocomplete > .list-group-item').last().addClass('focused');
}
else if (curClass == "") {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').prev('li').prev('li').addClass('focused');
}
else {
$('.custom-autocomplete > .list-group-item.focused').removeClass('focused').prev('li').addClass('focused');
}
}
return false;
}
问题是什么?Alvaro,当用jquery按下向上/向下箭头时,我无法将焦点设置在下一个和上一个li上