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https://github.com/bevacqua/horsey

:horse: Progressive and customizable autocomplete component
https://github.com/bevacqua/horsey

autocomplete component es6 front-end javascript vanilla

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:horse: Progressive and customizable autocomplete component

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README 

        
# Horsey



> Progressive and customizable autocomplete component



Browser support includes every sane browser and **IE7+**.



# Demo!



You can see a [live demo here][3].



[![screenshot.png][5]][3]



# Inspiration



I needed a fast, easy to use, and reliable autocomplete library. The ones I stumbled upon were too bloated, too opinionated, or provided an unfriendly human experience.



The goal is to produce a framework-agnostic autocomplete that is easily integrated into your favorite MVC framework, that doesn't translate into a significant addition to your codebase, and that's **enjoyable to work with**. Horsey shares the modular design philosophy of [Rome, the datetime picker][1]. Furthermore, it plays well with [Insignia, the tag editor][2] component, and pretty much any other well-delimited component out there.



# Features



- Small and focused

- Natural keyboard navigation

- Progressively enhanced

- Extensive browser support

- Fuzzy searching

- Supports `` and `` elements



# Install



You can get it on npm.



```shell

npm install horsey --save

```



Or bower, too.



```shell

bower install horsey --save

```



# Options



Entry point is `horsey(el, options)`. Configuration options are detailed below. This method [returns a small API](#api) into the `horsey` autocomplete list instance. You can also find existing horsey instances using `horsey.find`.



## `predictNextSearch(info)`



Runs when a tag is inserted. The returned string is used to pre-fill the text input. Useful to avoid repetitive user input. The suggestion list can be used to choose a prefix based on the previous list of suggestions.



- `info.input` contains the user input at the time a suggestion was selected

- `info.suggestions` contains the list of suggestions at the time a suggestion was selected

- `info.selection` contains the suggestion selected by the user



## `cache`



Can be an object that will be used to store queries and suggestions. You can provide a `cache.duration` as well, which defaults to one day and is specified in seconds. The `cache.duration` is used to figure out whether cache entries are fresh or stale.

You can disable autocomplete caching by setting `cache` to `false`.



## `limit`



Can be a number that determines the maximum amount of suggestions shown in the autocomplete list.



## `filter(query, suggestion)`



By default suggestions are filtered using the [`fuzzysearch`](https://github.com/bevacqua/fuzzysearch) algorithm. You can change that and use your own `filter` algorithm instead.



## `source`



A `source(data, done)` should be set to a function. The `done(err, items)` function should provide the `items` for the provided `data.input`.



- `data.input` is a query for which suggestions should be provided

- `data.limit` is the previously specified `options.limit`

- `data.previousSelection` is the last suggestion selected by the user

- `data.previousSuggestions` is the last list of suggestions provided to the user



The expected schema for the `items` object result is outlined below.



```js

[category1, category2, category3]

```



Each category is expected to follow the next schema. The `id` is optional, all category objects without an `id` will be treated as if their `id` was `'default'`. Note that categories under the same `id` will be merged together when displaying the autocomplete suggestions.



```js

{

  id: 'here is some category',

  list: [item1, item2, item3]

}

```



## `blankSearch`



When this option is set to `true`, the `source(data, done)` function will be called even when the `input` string is empty.



## `noMatches`



Defaults to `null`. Set to a string if you want to display an informational message when no suggestions match the provided `input` string. Note that this message won't be displayed when `input` is empty even if `blankSearch` is turned on.



## `debounce`



The minimum amount of milliseconds that should ellapse between two different calls to `source`. Useful to allow users to type text without firing dozens of queries. Defaults to `300`.



## `highlighter`



If set to `false`, autocomplete suggestions won't be highlighted based on user input.



## `highlightCompleteWords`



If set to `false`, autocomplete suggestions won't be highlighted as whole words first. The highlighter will be faster but the UX won't be as close to user expectations.



## `renderItem`



By default, items are rendered using the text for a `suggestion`. You can customize this behavior by setting `autocomplete.renderItem` to a function that receives `li, suggestion` parameters. The `li` is a DOM element and the `suggestion` is its data object.



## `renderCategory`



By default, categories are rendered using just their `data.title`. You can customize this behavior by setting `autocomplete.renderCategory` to a function that receives `div, data` parameters. The `div` is a DOM element and the `data` is the full category data object, including the `list` of suggestions. After you customize the `div`, the list of suggestions for the category will be appended to `div`.



# API



Once you've instantiated a `horsey`, you can do a few more things with it.



## `.clear()`



You can however, remove every single suggestion from the autocomplete, wiping the slate clean. Contrary to `.destroy()`, `.clear()` won't leave the `horsey` instance useless, and calling `.add` will turn it back online in no time.



## `.source`



Exposes the suggestions that have been added so far to the autocomplete list. Includes suggestions that may not be shown due to filtering. This should be treated as a read-only list.



## `.show()`



Shows the autocomplete list.



## `.hide()`



Hides the autocomplete list.



## `.toggle()`



Shows or hides the autocomplete list.



## `.refreshPosition()`



Updates the position of the autocomplete list relative to the position of the `el`. Only necessary when the `el` is moved.



## `.destroy()`



Unbind horsey-related events from the `el`, remove the autocomplete list. It's like `horsey` was never here.



## `.retarget(target)`



Detaches this `horsey` instance from `el`, removing events and whatnot, and then attaches the instance to `target`. Note that `horsey.find` will still only work with `el`. This method is mostly for internal purposes, but it's also useful if you're developing a text editor with multiple modes (particularly if it switches between a `` and a content-editable `
`).



## `.anchor`



The anchor value that was originally passed into `horse` as `options.anchor`.



## `.defaultRenderer`



The default `render` method



## `.defaultGetText`



The default `getText` method



## `.defaultGetValue`



The default `getValue` method



## `.defaultSetter`



The default `set` method



## `.defaultFilter`



The default `filter` method



## `.appendText`



Method called whenever we have an `anchor` and we need to append a suggestion to an input field. Defaults to `defaultAppendText`.



## `.appendHTML`



Method called whenever we have an `anchor` and we need to append a suggestion for a `contentEditable` element. **Unsupported by default**. Provided by [banksy][8].



## `.defaultAppendText`



Default `appendText` implementation



## `.filterAnchoredText`



Method called whenever we have an `anchor` and we need to filter a suggestion for an input field.



## `.filterAnchoredHTML`



Method called whenever we have an `anchor` and we need to filter a suggestion for a `contentEditable` element. **Unsupported by default**. Provided by [banksy][8].



# Events



Once you've instantiated a `horsey`, some propietary synthetic events will be emitted on the provided `el`.



Name              | Description

------------------|---------------------------------------------------------------

`horsey-show`     | Fired whenever the autocomplete list is displayed

`horsey-hide`     | Fired whenever the autocomplete list is hidden

`horsey-filter`   | Fired whenever the autocomplete list is about to be filtered. Useful to prime the filter method



## Usage with [woofmark][7]



See [banksy][8] to integrate `horsey` into [woofmark][7].



# License



MIT



[1]: https://github.com/bevacqua/rome

[2]: https://github.com/bevacqua/insignia

[3]: http://bevacqua.github.io/horsey

[4]: https://github.com/bevacqua/fuzzysearch

[5]: http://i.imgur.com/imDFC0C.png

[6]: https://github.com/bevacqua/woofmark#editor

[7]: https://github.com/bevacqua/woofmark

[8]: https://github.com/bevacqua/banksy