meltingice

A complement to the jQuery library Chosen that adds ajax autocomplete

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Ajax-Chosen

Name: ajax-chosen
Brand: ajax-chosen
SKU: //meltingice/ajax-chosen
Rating: 2.7725 (409 reviews)

This project is no longer maintained and is likely extremely out of date with the original chosen library. There are much better alternatives out there now.

This project is an addition to the excellent Chosen jQuery plugin that makes HTML input forms more friendly. Chosen adds search boxes to

select

HTML elements, so I felt it could use the addition of ajax autocomplete for awesomely dynamic forms.

This script bootstraps the existing Chosen plugin without making any modifications to the original code. Eventually, I would love to see this functionality built-in to the library, but until then, this seems to work pretty well.

How to Use

This plugin exposes a new jQuery function named

ajaxChosen

that we call on a

select

element. The first argument consists of the options passed to the jQuery $.ajax function. The

data

parameter is optional, and the

success

callback is also optional.

The second argument is a callback that tells the plugin what HTML

option

elements to make. It is passed the data returned from the ajax call, and you have to return an array of objects for which each item has a

value

property corresponding to the HTML

option

elements'

value

attribute, and a

text

property corresponding to the text to display for each option. In other words:

[{"value": 3, "text": "Ohio"}]

becomes:

Ohio

or for grouping:

[{
    group: true,
    text: "Europe",
    items: [
        { "value": "10", "text": "Stockholm" },
        { "value": "23", "text": "London" }
    ]
},
{
    group: true,
    text: "Asia",
    items: [
        { "value": "36", "text": "Beijing" },
        { "value": "20", "text": "Tokyo" }
    ]
}]

becomes:

    
        Stockholm
        London
    
    
        Beijing
        Tokyo

Note:

Due to a bug in Chosen, it is necessary to change

choosen.css

Add

display: list-item;

.chzn-container .chzn-results .group-result {

class

Options

There are some additional ajax-chosen specific options you can pass into the first argument to control its behavior.

```
minTermLength
```
: minimum number of characters that must be typed before an ajax call is fired
```
afterTypeDelay
```
: how many milliseconds to wait after typing stops to fire the ajax call
```
jsonTermKey
```
: the ajax request key to use for the search query (defaults to
```
term
```
)

Example Code

$("#example-input").ajaxChosen({
    type: 'GET',
    url: '/ajax-chosen/data.php',
    dataType: 'json'
}, function (data) {
    var results = [];

$.each(data, function (i, val) {
    results.push({ value: val.value, text: val.text });
});

return results;
});

To have the results grouped in

optgroup

elements, have the function return a list of group objects instead:

$("#example-input").ajaxChosen({
    type: 'GET',
    url: '/ajax-chosen/grouped.php',
    dataType: 'json'
}, function (data) {
    var results = [];

$.each(data, function (i, val) {
    var group = { // here's a group object:
        group: true,
        text: val.name, // label for the group
        items: [] // individual options within the group
    };

    $.each(val.items, function (i1, val1) {
        group.items.push({value: val1.value, text: val1.text});
    });

    results.push(group);
});

return results;
});

Developing ajax-chosen

In order to install development dependencies, you can run in the ajax-chosen directory:

npm install -d

ajax-chosen is written in Coffeescript, so there is a Cakefile provided that will perform all necessary tasks for you. Simply run

cake

to see all available commands.

ajax-chosen