jQuery UI Autocomplete:在textarea中的minLength,是否有一种方法可以在每一行中从0开始计数? [英] jQuery UI Autocomplete: minLength in a textarea, is there a way to begin counting from 0 in every new line?
问题描述
目前,我正在研究允许用户输入预定义句子的textarea
.因此,用户不必键入所有这些句子.
我唯一要更改的是将minlength
设置为3,对于textarea
中的第一行,它工作得很好.但是,当然在第2行中,它显示所有条目而无需等待minlength
,因为由于前面的文本行,minlength=3
为true.
如何重新设置或设置新行中的最小长度?
JS
$("#AutoCompleteSentenceSuggestion")
.autocomplete({
minLength: 3,
source: function (request, response) {
$.getJSON("/AutoCompleteFeatures/AutoCompleteSentenceSuggestion", {
term: extractLast(request.term)
}, response);
},
focus: function () {
return false;
},
select: function (event, ui) {
var terms = split(this.value);
terms.pop();
terms.push("\u2022" + " " + ui.item.value);
terms.push("");
this.value = terms.join("\n");
return false;
}
});
使用HTML标记更新: HTML
<table class="table-textarea">
<tr>
<td class="style-class-2" rowspan="2">4</td>
<td class="style-class-3">Additional Information</td>
</tr>
<tr>
<td>
@Html.TextAreaFor(m => m.additionalInformation)
</td>
</tr>
</table>
我使用我在评论中提到的示例来提供此功能.
工作示例: https://jsfiddle.net/Twisty/yfdjyq79/
JavaScript
$(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("\n");
}
function extractLast(term) {
return split(term).pop();
}
$("#tags")
// don't navigate away from the field on tab when selecting an item
.on("keydown", function(event) {
if (event.keyCode === $.ui.keyCode.TAB &&
$(this).autocomplete("instance").menu.active) {
event.preventDefault();
}
})
.autocomplete({
minLength: 3,
source: function(request, response) {
// delegate back to autocomplete, but extract the last term
response($.ui.autocomplete.filter(
availableTags, extractLast(request.term)));
},
focus: function() {
// prevent value inserted on focus
return false;
},
select: function(event, ui) {
var terms = split(this.value);
// remove the current input
terms.pop();
// add the selected item
terms.push("\u2022 " + ui.item.value);
// add placeholder to get the comma-and-space at the end
terms.push("");
this.value = terms.join("\r\n");
return false;
}
});
});
您当然想移动source
部分.我在select
中更新了split()
和join()
.不需要使用\r\n
,但是我认为将其用于跨平台解决方案很重要.并非所有浏览器都将其用作行尾,因此我只寻求\n
作为分隔符.
更新
这是一个更新,它将防止该词少于3个字符时触发新条目.
https://jsfiddle.net/Twisty/yfdjyq79/5/ >
JS代码段
source: function(request, response) {
// delegate back to autocomplete, but extract the last term
var resp;
var lastTerm = extractLast(request.term);
if (lastTerm.length >= 3) {
response($.ui.autocomplete.filter(availableTags, lastTerm));
}
},
您可以预先存储值,但是由于正在初始化,因此无法调用$(selector).autocomplete("option", "minLength")
.那会很方便.例如: https://jsfiddle.net/Twisty/yfdjyq79/7/ >
At the moment, I'm working on a textarea
that allows the user to input predefined sentences. So, the user does not have to type in all those sentences.
The only thing I would like to change is, the minlength
is set to 3, that works perfectly fine for the first line in the textarea
. But of course in Line 2, it shows all entries without waiting for minlength
, because minlength=3
is true because of the text line before.
How could I reset or set back the min length in a new line of text?
JS
$("#AutoCompleteSentenceSuggestion")
.autocomplete({
minLength: 3,
source: function (request, response) {
$.getJSON("/AutoCompleteFeatures/AutoCompleteSentenceSuggestion", {
term: extractLast(request.term)
}, response);
},
focus: function () {
return false;
},
select: function (event, ui) {
var terms = split(this.value);
terms.pop();
terms.push("\u2022" + " " + ui.item.value);
terms.push("");
this.value = terms.join("\n");
return false;
}
});
Update with HTML Markup: HTML
<table class="table-textarea">
<tr>
<td class="style-class-2" rowspan="2">4</td>
<td class="style-class-3">Additional Information</td>
</tr>
<tr>
<td>
@Html.TextAreaFor(m => m.additionalInformation)
</td>
</tr>
</table>
I offer this up, using the example I mentioned in my comment.
Working Example: https://jsfiddle.net/Twisty/yfdjyq79/
JavaScript
$(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("\n");
}
function extractLast(term) {
return split(term).pop();
}
$("#tags")
// don't navigate away from the field on tab when selecting an item
.on("keydown", function(event) {
if (event.keyCode === $.ui.keyCode.TAB &&
$(this).autocomplete("instance").menu.active) {
event.preventDefault();
}
})
.autocomplete({
minLength: 3,
source: function(request, response) {
// delegate back to autocomplete, but extract the last term
response($.ui.autocomplete.filter(
availableTags, extractLast(request.term)));
},
focus: function() {
// prevent value inserted on focus
return false;
},
select: function(event, ui) {
var terms = split(this.value);
// remove the current input
terms.pop();
// add the selected item
terms.push("\u2022 " + ui.item.value);
// add placeholder to get the comma-and-space at the end
terms.push("");
this.value = terms.join("\r\n");
return false;
}
});
});
You will want to move your source
portions of course. I updated the split()
and the join()
within select
. Using \r\n
is not required, but I felt it was important to use for a cross platform solution. Not all browsers will use this as the end of line, so I only seek \n
as the delimiter.
UPDATE
Here is an update that will prevent new entries from firing when the term is less then 3 characters.
https://jsfiddle.net/Twisty/yfdjyq79/5/
JS Snippet
source: function(request, response) {
// delegate back to autocomplete, but extract the last term
var resp;
var lastTerm = extractLast(request.term);
if (lastTerm.length >= 3) {
response($.ui.autocomplete.filter(availableTags, lastTerm));
}
},
You can store the value up front but you cannot call $(selector).autocomplete("option", "minLength")
since you're initializing it. That would have been convenient. For example: https://jsfiddle.net/Twisty/yfdjyq79/7/
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