I am using the Typeahead component of Twitter Bootstrap 2.1.1, and jQuery 1.8.1
I am trying to access the text box element from within typeahead's updater
function. Here is my current code, which works great:
$('#client-search').typeahead({
source: function (query, process) {
$.get(url, { query: query }, function (data) {
labels = [];
mapped = {};
$.each(data, function(i,item) {
mapped[item.label] = item.value;
labels.push(item.label);
});
process(labels);
});
}
,updater: function (item) {
$('#client-id').val(mapped[item]);
return item;
}
,items: 10
,minLength: 2
});
I have many typeahead search boxes on the same page. Each search box has an id #xxx-search
and a corresponding hidden input with id #xxx-id
. I'd like to re-use the same code for everything by doing something like this:
$('#client-search, #endClient-search, #other-search').typeahead({
...
,updater: function (item) {
var target = $(this).attr('id').split('-')[0] + '-id';
$('#'+target).val(mapped[item]);
return item;
}
...
I thought that this
would refer to the text box element in use, but apparently not, because I get an undefined error in firebug:
$(this).attr("id") is undefined
When I use this
instead of $(this)
, I get:
this.attr is not a function
Can anyone help make this work?
UPDATE: THE ANSWER, AND MORE!
Thanks to benedict_w's answer below, not only does this work perfectly now, but I have also made this much better in terms of re-usability.
Here is what my <input>
s look like:
<input type="text" autocomplete="off"
id="client-search"
data-typeahead-url="/path/to/json"
data-typeahead-target="client-id">
<input type="hidden" id="client-id" name="client-id">
Notice how the search box references the hidden id. Here's the new js:
$(':input[data-typeahead-url]').each(function(){
var $this = $(this);
$this.typeahead({
source: function (query, process) {
$.get($this.attr('data-typeahead-url'), { query: query }, function (data) {
labels = [];
mapped = {};
$.each(data, function(i,item) {
mapped[item.label] = item.value;
labels.push(item.label);
});
process(labels);
});
}
,updater: function (item) {
$('#'+$this.attr('data-typeahead-target')).val(mapped[item]);
return item;
}
,items: 10
,minLength: 2
});
});
You are inside another function so you need to save a reference to the element in the outer closure, this can then be passed into the event handler of the inner closure. You can do that using an $.each()
call to loop through the selector saving a reference to the element (this) each time - e.g.
$('#client-search, #endClient-search, #other-search').each(function() {
var $this = $(this);
$this.typeahead({
...
,updater: function (item) {
var target = $this.attr('id').split('-')[0] + '-id';
$('#'+target).val(mapped[item]);
return item;
}
...
});