我遇到的问题是由于变量范围,我无法从jQuery UI自动完成表单中获得任何结果。让我告诉你。
// TAKE A CLOSE LOOK AT THIS METHOD
select: function(e, ui) {
$('#instant-search').text(ui.item.label);
$("#search").autocomplete("option", "source",
function(request, response) {
getAutocompleteResults(function(d) {
// DOESN'T WORK response(d);
});
// WORKS BUT IT SHOULD BE A DYNAMIC ARRAY FROM THE "D" OBJECT
// response(["anarchism", "anarchist black cross", "black rose (symbolism)", "communist symbolism", "political symbolism"]);
});
$("#search").autocomplete("search", ui.item.label);
为了返回结果,我必须在response([...]);
函数之外使用函数getAutocompleteResults(function(d) { ... });
。
但是,源应该是动态的,而不是静态数组。换句话说:
函数response(d);
应返回一个对象,该对象包含一些属性(标题,值,提取)。我必须使用response(d);
访问它们,但是,此函数在getAutocompleteResults(function(d) { ... });
函数内不起作用。我怎样才能做到这一点?
有一小段代码,但主要问题是select
方法。您可以在整个代码块的中间找到它。我评论了它。
$(function() {
$("html").removeClass("no-js");
var autocompleteResults = [{
title: [],
extract: [],
pageId: []
}];
var capitalizeFirstLetter = function(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
};
var changeText2 = function(e) {
var request = $("input").val() + String.fromCharCode(e.which);
$("#instant-search").text(request);
var getAutocompleteResults = function(callback) {
$.ajax({
url: "https://en.wikipedia.org/w/api.php?format=json&action=query&generator=search&gsrlimit=6&prop=extracts&origin=*&pilimit=max&exintro&explaintext&exsentences=1&gsrsearch=" +
$("#instant-search").text(),
beforeSend: function() {
$(".loading").show();
},
success: function(d) {
$(".loading").hide();
autocompleteResults[0].title = [];
autocompleteResults[0].extract = [];
autocompleteResults[0].pageId = [];
if (d.hasOwnProperty("query")) {
if (d.query.hasOwnProperty("pages")) {
$.each(d.query.pages, function(i) {
autocompleteResults[0].title.push(d.query.pages[i].title);
autocompleteResults[0].extract.push(d.query.pages[i].extract);
autocompleteResults[0].pageId.push(d.query.pages[i].pageid);
});
}
}
if (!autocompleteResults[0].length) {
$(".ui-autocomplete").hide();
}
autocompleteResults[0].title.sort(function(a, b) {
var nameA = a.toUpperCase();
var nameB = b.toUpperCase();
if (nameA < nameB) {
return -1;
}
if (nameA > nameB) {
return 1;
}
return 0;
});
autocompleteResults[0].title = autocompleteResults[0].title.map(
function(i) {
return i.toLowerCase();
}
);
callback(autocompleteResults[0]);
},
datatype: "json",
cache: false
});
};
$("#search").autocomplete({
source: function(request, response) {
getAutocompleteResults(function(d) {
var results = [],
filteredAutocompleteResults = [];
filteredAutocompleteResults = d.title.filter(function(i) {
return (
i !=
$("#instant-search")
.text()
.toLowerCase()
);
});
for (var i = 0; i < d.title.length; i++) {
results[i] = {
label: filteredAutocompleteResults[i],
extract: d.extract[i],
pageId: d.pageId[i]
};
}
if (results.length == 5) {
response(results);
} else {
response(results.slice(0, 5));
}
});
},
response: function() {
if ($("#instant-search").text()) {
$("table").css("display", "table");
$(".wikisearch-container").css("margin-top", 100);
}
},
close: function() {
if (!$(".ui-autocomplete").is(":visible")) {
$(".ui-autocomplete").show();
}
},
appendTo: ".input",
focus: function(e) {
e.preventDefault();
},
delay: 0,
// TAKE A CLOSE LOOK AT THIS METHOD
select: function(e, ui) {
$('#instant-search').text(ui.item.label);
$("#search").autocomplete("option", "source",
function(request, response) {
getAutocompleteResults(function(d) {
// DOESN'T WORK response(d);
});
// WORKS BUT IT SHOULD BE A DYNAMIC ARRAY FROM THE "D" OBJECT
// response(["anarchism", "anarchist black cross", "black rose (symbolism)", "communist symbolism", "political symbolism"]);
});
$("#search").autocomplete("search", ui.item.label);
// EVERYTHING SHOULD BE FINE BELOW THIS LINE
if ($(".search-results").css("opacity") != 1) {
$(".search-results h4").text(capitalizeFirstLetter(ui.item.label));
$(".search-results p").text(ui.item.extract);
$(".search-results a").prop(
"href",
"https://en.wikipedia.org/?curid=" + ui.item.pageId
);
$(".search-results").css("opacity", 1);
} else if (
$(".search-results h4")
.text()
.toLowerCase() != ui.item.label
) {
$(".search-results").css("opacity", 0);
setTimeout(function() {
$(".search-results h4").text(capitalizeFirstLetter(ui.item.label));
$(".search-results p").text(ui.item.extract);
$(".search-results a").prop(
"href",
"https://en.wikipedia.org/?curid=" + ui.item.pageId
);
$(".search-results").css("opacity", 1);
}, 500);
}
},
create: function() {
$(this).data("ui-autocomplete")._renderItem = function(ul, item) {
return $("<li>")
.append(
'<div class="ui-menu-item-wrapper"><div class="autocomplete-first-field"><i class="fa fa-search" aria-hidden="true"></i></div><div class="autocomplete-second-field three-dots">' +
item.label +
"</div></div>"
)
.appendTo(ul);
};
}
});
};
var changeText1 = function(e) {
if (
/[-a-z0-90áãâäàéêëèíîïìóõôöòúûüùçñ!@#$%^&*()_+|~=`{}\[\]:";'<>?,.\s\/]+/gi.test(
String.fromCharCode(e.which)
)
) {
$("input").on("keypress", changeText2);
}
// DONT TOUCH THIS AREA, IT HAS NOTHING TO DO WITH THE PROBLEM
var getInputSelection = function(input) {
var start = 0,
end = 0;
input.focus();
if (
typeof input.selectionStart == "number" &&
typeof input.selectionEnd == "number"
) {
start = input.selectionStart;
end = input.selectionEnd;
} else if (document.selection && document.selection.createRange) {
var range = document.selection.createRange();
if (range) {
var inputRange = input.createTextRange();
var workingRange = inputRange.duplicate();
var bookmark = range.getBookmark();
inputRange.moveToBookmark(bookmark);
workingRange.setEndPoint("EndToEnd", inputRange);
end = workingRange.text.length;
workingRange.setEndPoint("EndToStart", inputRange);
start = workingRange.text.length;
}
}
return {
start: start,
end: end,
length: end - start
};
};
switch (e.key) {
case "Backspace":
case "Delete":
e = e || window.event;
var keyCode = e.keyCode;
var deleteKey = keyCode == 46;
var sel, deletedText, val;
val = this.value;
sel = getInputSelection(this);
if (sel.length) {
// 0 kai paprastai trini po viena o 1 ar daugiau kai select su pele trini
$("#instant-search").text(
val.substr(0, sel.start) + val.substr(sel.end)
);
} else {
$("#instant-search").text(
val.substr(0, deleteKey ? sel.start : sel.start - 1) +
val.substr(deleteKey ? sel.end + 1 : sel.end)
);
}
break;
case "Enter":
if ($("#instant-search").text()) {
console.log("Redirecting...");
}
break;
}
if (!$("#instant-search").text()) {
$("table, .ui-autocomplete").hide();
$(".wikisearch-container").css("margin-top", "");
}
if (
$(".ui-menu-item-wrapper").hasClass("ui-state-active") &&
(e.key == "ArrowRight" || e.key == "ArrowLeft")
) {
$(".ui-autocomplete").autocomplete(""); // Error metas console ir taip neturėtų būti bet nežinau kaip padaryti kad pasirinkus elementą su <-- ar --> nepadarytų tik vieno rezultato todėl paliekam laikinai ;)
}
};
$("input").on("keydown", changeText1);
$("input").on("input", function(e) {
$("#instant-search").text($("#search").val());
});
});
html,
body {
height: 100%;
width: 100%;
}
body {
margin: 0;
padding: 0;
font-family: sans-serif;
background-image: url("http://www.part.lt/img/96816a00ec1fb87adc4ca8a04365b2b5719.jpg");
background-size: cover;
background-position: 100%;
}
.v-container {
display: table;
height: 100%;
width: 100%;
}
.v-content {
display: table-cell;
vertical-align: middle;
}
.text-center {
text-align: center;
}
.input {
overflow: hidden;
white-space: nowrap;
}
.input input#search {
width: calc(100% - 30px);
height: 50px;
border: none;
font-size: 10pt;
float: left;
color: #4f5b66;
padding: 0 15px;
outline: none;
}
.ui-autocomplete {
list-style: none;
background-color: #fff;
-webkit-user-select: none;
user-select: none;
padding: 0;
margin: 0;
width: 100% !important;
top: auto !important;
display: table;
table-layout: fixed;
}
.ui-helper-hidden-accessible {
display: none;
}
.autocomplete-first-field {
width: 15%;
display: inline-block;
}
.autocomplete-second-field {
width: 85%;
display: inline-block;
text-align: left;
vertical-align: middle;
}
.three-dots {
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
table {
width: 100%;
border-spacing: 0;
border-collapse: collapse;
display: none;
table-layout: fixed;
}
table tr {
background-color: #fff;
-webkit-user-select: none;
user-select: none;
}
tr:first-child {
background-color: #ffc800;
color: #fff;
}
table td,
.ui-menu-item-wrapper {
padding: 10px 0;
}
td:nth-child(2) {
width: 85%;
text-align: left;
}
.ui-menu-item,
table {
cursor: pointer;
}
:focus {
outline: 0;
}
a {
text-decoration: none;
color: #fff;
position: relative;
}
a:before {
content: "";
position: absolute;
width: 100%;
height: 0.0625rem;
bottom: 0;
left: 0;
background-color: #fff;
visibility: hidden;
-webkit-transform: scaleX(0);
transform: scaleX(0);
-webkit-transition: all 0.3s ease-in-out 0s;
transition: all 0.3s ease-in-out 0s;
}
a:hover:before {
visibility: visible;
-webkit-transform: scaleX(1);
transform: scaleX(1);
}
.search-results {
background: #fff;
margin-top: 50px;
border-left: 5px solid #0ebeff;
opacity: 0;
-webkit-transition: opacity 1s;
transition: opacity 1s;
}
.search-results h4,
.search-results p {
margin: 0;
padding: 10px;
text-align: left;
}
.search-results a {
color: #0ebeff;
display: inline-block;
margin: 1rem 0;
}
.search-results a:before {
background-color: #0ebeff;
}
.wikisearch-container {
width: 65%;
margin: 0 auto;
}
/* Loading animation */
@keyframes lds-eclipse {
0% {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
50% {
-webkit-transform: rotate(180deg);
transform: rotate(180deg);
}
100% {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
@-webkit-keyframes lds-eclipse {
0% {
-webkit-transform: rotate(0deg);
transform: rotate(0deg);
}
50% {
-webkit-transform: rotate(180deg);
transform: rotate(180deg);
}
100% {
-webkit-transform: rotate(360deg);
transform: rotate(360deg);
}
}
.loading {
position: relative;
top: 9.5px;
right: 15px;
pointer-events: none;
display: none;
}
.lds-eclipse {
-webkit-animation: lds-eclipse 1s linear infinite;
animation: lds-eclipse 1s linear infinite;
width: 2rem;
height: 2rem;
border-radius: 50%;
margin-left: auto;
box-shadow: 0.08rem 0 0 #0ebeff;
}
@media (max-width: 71.875em) {
.wikisearch-container {
width: 75%;
}
}
@media (max-width: 50em) {
.wikisearch-container {
width: 85%;
}
}
@media (max-width: 17.96875em) {
.wikisearch-container {
width: 100%;
}
}
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>
<html class="no-js">
<div class="v-container">
<div class="v-content text-center">
<div class="wikisearch-container">
<div class="input">
<input type="text" id="search" placeholder="Search...">
<div class="loading">
<div class="lds-eclipse"></div>
</div>
<button class="icon"><i class="fa fa-search"></i></button>
<table>
<tr>
<td class="fa fa-search">
<td id="instant-search" class="three-dots"></td>
</tr>
</table>
</div>
<div class="search-results">
<h4></h4>
<p></p>
<a target="_blank">Click here for more</a>
</div>
</div>
</div>
</div>
编辑1
经过一些更改后,会在ajax调用之前显示结果。如何在成功完成ajax之后使用response()
(尝试使用success
回调,不起作用:()?
完整的项目代码:https://codepen.io/Kestis500/pen/zRONyw?editors=0010。
在这里,您可以逐步了解它的外观:
编辑2 我修复了很多东西,并从我的代码中删除了一些非常无意义的东西。但是,ajax调用的情况仍然相同。
https://codepen.io/Kestis500/pen/pazppP?editors=0110
有什么想法吗?
编辑3 修复了ajax滞后(现在只有在前一个ajax调用之后才会发送ajax请求)。
答案 0 :(得分:1)
我必须首先修复Ajax调用中的一些内容。然后,我们收集结果并构建一个应返回response()
的数组。这将填充AutoComplete。
首先,我们将检查HTML。有一些结束标签丢失。
<强> HTML 强>
<div class="v-container">
<div class="v-content text-center">
<div class="wikisearch-container">
<div class="input ui-front">
<input type="text" id="search" placeholder="Search...">
<div class="loading">
<div class="lds-eclipse"></div>
</div>
<button class="icon">
<i class="fa fa-search"></i>
</button>
<table>
<tr>
<td class="fa fa-search"></td>
<td id="instant-search" class="three-dots"></td>
</tr>
</table>
</div>
<div class="search-results">
<h4></h4>
<p></p>
<a target="_blank">Click here for more</a>
</div>
</div>
</div>
</div>
您可以看到table
并且它的单元格现在都有正确的结束标记。
我没有对CSS或Style进行任何更改。
<强>的JavaScript 强>
$(function() {
var capitalizeFirstLetter = function(string) {
return string.charAt(0).toUpperCase() + string.slice(1);
};
$("#search").autocomplete({
source: function(request, response) {
var results = [];
$.ajax({
url: "https://en.wikipedia.org/w/api.php",
data: {
format: "json",
action: "query",
generator: "search",
gsrlimit: 6,
prop: "extracts|pageimages",
origin: "*",
pilimit: "max",
exintro: false,
explaintext: false,
exsentences: 1,
gsrsearch: request.term
},
beforeSend: function() {
$(".loading").show();
},
success: function(d) {
$(".loading").hide();
if (d.query.pages) {
$.each(d.query.pages, function(k, v) {
console.log(k, v.title, v.extract, v.pageid);
results.push({
label: v.title,
value: "https://en.wikipedia.org/?curid=" + v.pageid,
title: v.title,
extract: v.extract,
pageId: v.pageid
});
});
response(results);
}
},
datatype: "json",
cache: false
});
response(results);
},
close: function() {
if (!$(".ui-autocomplete").is(":visible")) {
$(".ui-autocomplete").show();
}
},
focus: function(e) {
e.preventDefault();
return false;
},
delay: 0,
select: function(e, ui) {
if ($(".search-results").css("opacity") != 1) {
$(".search-results h4").text(capitalizeFirstLetter(ui.item.label));
$(".search-results p").text(ui.item.extract);
$(".search-results a").prop(
"href",
ui.item.value
);
$(".search-results").css("opacity", 1);
} else if (
$(".search-results h4")
.text()
.toLowerCase() != ui.item.label
) {
$(".search-results").css("opacity", 0);
setTimeout(function() {
$(".search-results h4").text(capitalizeFirstLetter(ui.item.label));
$(".search-results p").text(ui.item.extract);
$(".search-results a").prop(
"href",
ui.item.value
);
$(".search-results").css("opacity", 1);
}, 500);
}
return false;
}
}).autocomplete("instance")._renderItem = function(ul, item) {
var $item = $("<li>");
var $wrap = $("<div>").appendTo($item);
var $field1 = $("<div>", {
class: "autocomplete-first-field"
}).appendTo($wrap);
$("<i>", {
class: "fa fa-search",
"aria-hidden": true
}).appendTo($field1);
$("<div>", {
class: "autocomplete-second-field three-dots"
}).html(item.label).appendTo($wrap);
return $item.appendTo(ul);
};
});
有很多事情需要修复和改进。
让我们从Ajax开始。您正在调用MediaWiki API并期待一些结果。当呼叫返回时,它将生成关于pilimit
的警告。深入研究API文档,这是一个特定于pageimages
属性调用的参数。要解决此问题,prop
值必须为extracts|pageimages
。现在我得到一套干净的结果。
您可以看到我打破了数据,以便我可以更轻松地进行更改,并查看我发送给API的参数。你的方法没有错,我发现这更容易使用。
当我们填充.autocomplete()
时,source
内部就会发生这种情况。当我们将function
用作source
时,必须遵循一些准则:
request
和response
{ label, value }
response
函数。一个简短的例子:
$(selector).autocomplete({
source: function(req, resp){
var q = req.term;
// The Request is an object that contains 1 index: term
// request.term will contain the content of our search
var results = [];
// An array to store the results
$.getJSON("myapi.php", {query: q}, function(data){
$.each(data, function(key, val){
// iterate over the result data and populate our result array
results.push({
label: data.name,
value: data.url
});
resp(results);
});
});
}
});
您可以按自己喜欢的方式对结果进行排序或过滤;只要你最后将它们传递给response
。
使用focus
和select
回调,您希望返回false
。这里将对此进行更多讨论:http://jqueryui.com/autocomplete/#custom-data
我们也看到了渲染菜单项的一个很好的例子。我转而制作jQuery对象与原始HTML。你做的最适合你。
工作示例:https://jsfiddle.net/Twisty/vr6gv2aw/4/
希望这有帮助。