# React Tag Autocomplete
[](https://travis-ci.org/i-like-robots/react-tags) [](https://coveralls.io/github/i-like-robots/react-tags)
React Tag Autocomplete is a simple tagging component ready to drop in your React projects. Originally based on the [React Tags project](http://prakhar.me/react-tags/example) by Prakhar Srivastav this version removes the drag-and-drop re-ordering functionality, adds appropriate roles and ARIA states and introduces a resizing text input. React Tag Autocomplete is compatible with [Preact](https://preactjs.com/) >= 6.0.0.
## Installation
The preferred way of using the component is via NPM
```
npm install --save react-tag-autocomplete
```
## Usage
Here's a sample implementation that initializes the component with a list of preselected `tags` and a `suggestions` list. For more details, go through the [API](#Options).
```js
const React = require('react')
const ReactTags = require('react-tag-autocomplete')
class App extends React.Component {
constructor (props) {
super(props)
this.state = {
tags: [
{ id: 1, name: "Apples" },
{ id: 2, name: "Pears" }
],
suggestions: [
{ id: 3, name: "Bananas" },
{ id: 4, name: "Mangos" },
{ id: 5, name: "Lemons" },
{ id: 6, name: "Apricots" }
]
}
}
handleDelete (i) {
const tags = this.state.tags.slice(0)
tags.splice(i, 1)
this.setState({ tags })
}
handleAddition (tag) {
const tags = [].concat(this.state.tags, tag)
this.setState({ tags })
}
render () {
return (
)
}
}
React.render(, document.getElementById('app'))
```
### Options
- [`tags`](#tags-optional)
- [`suggestions`](#suggestions-optional)
- [`placeholder`](#placeholder-optional)
- [`autofocus`](#autofocus-optional)
- [`autoresize`](#autoresize-optional)
- [`delimiters`](#delimiters-optional)
- [`delimiterChars`](#delimitersChars-optional)
- [`minQueryLength`](#minquerylength-optional)
- [`maxSuggestionsLength`](#maxsuggestionslength-optional)
- [`classNames`](#classnames-optional)
- [`handleAddition`](#handleaddition-optional)
- [`handleDelete`](#handledelete-optional)
- [`handleInputChange`](#handleinputchange-optional)
- [`allowNew`](#allownew-optional)
- [`tagComponent`](#tagc`omponent-optional)
#### tags (optional)
An array of tags that are displayed as pre-selected. Each tag must have an `id` and a `name` property. Default: `[]`.
```js
const tags = [
{ id: 1, name: "Apples" },
{ id: 2, name: "Pears" }
]
```
#### suggestions (optional)
An array of suggestions that are used as basis for showing suggestions. Each suggestion must have an `id` and a `name` property and an optional `disabled` property. Default: `[]`.
```js
const suggestions = [
{ id: 3, name: "Bananas" },
{ id: 4, name: "Mangos" },
{ id: 5, name: "Lemons" },
{ id: 6, name: "Apricots", disabled: true }
]
```
#### placeholder (optional)
The placeholder string shown for the input. Default: `'Add new tag'`.
#### autofocus (optional)
Boolean parameter to control whether the text-input should be autofocused on mount. Default: `true`.
#### autoresize (optional)
Boolean parameter to control whether the text-input should be automatically resized to fit its value. Default: `true`.
#### delimiters (optional)
Array of integers matching keyboard event `keyCode` values. When a corresponding key is pressed, the preceding string is finalised as tag. Default: `[9, 13]` (Tab and return keys).
#### delimiterChars (optional)
Array of characters matching keyboard event `key` values. This is useful when needing to support a specific character irrespective of the keyboard layout. Note, that this list is separate from the one specified by the `delimiters` option, so you'll need to set the value there to `[]`, if you wish to disable those keys. Example usage: `delimiterChars={[',', ' ']}`. Default: `[]`
#### minQueryLength (optional)
How many characters are needed for suggestions to appear. Default: `2`.
#### maxSuggestionsLength (optional)
Maximum number of suggestions to display. Default: `6`.
#### classNames (optional)
Override the default class names. Defaults:
```js
{
root: 'react-tags',
rootFocused: 'is-focused',
selected: 'react-tags__selected',
selectedTag: 'react-tags__selected-tag',
selectedTagName: 'react-tags__selected-tag-name',
search: 'react-tags__search',
searchInput: 'react-tags__search-input',
suggestions: 'react-tags__suggestions',
suggestionActive: 'is-active',
suggestionDisabled: 'is-disabled'
}
```
#### handleAddition (required)
Function called when the user wants to add a tag. Receives the tag.
```js
function (tag) {
// Add the tag { id, name } to the tag list
tags.push(tag)
}
```
#### handleDelete (required)
Function called when the user wants to delete a tag. Receives the tag index.
```js
function (i) {
// Delete the tag at index i
tags.splice(i, 1)
}
```
#### handleInputChange (optional)
Optional event handler when the input changes. Receives the current input value.
```js
function (input) {
if (!this.state.busy) {
this.setState({ busy: true })
return fetch(`query=${input}`).then((result) => {
this.setState({ busy: false })
})
}
}
```
#### allowNew (optional)
Allows users to add new (not suggested) tags. Default: `false`.
#### allowBackspace (optional)
Disables ability to delete the selected tags when backspace is pressed while focussed on the text input. Default: `true`.
#### tagComponent (optional)
Provide a custom tag component to render. Default: `null`.
### Styling
It is possible to customize the look of the component the way you want it. An example can be found in `/example/styles.css`.
### Development
The component is written in ES6 and uses [Webpack](http://webpack.github.io/) as its build tool.
```
npm install
npm run dev # open http://localhost:8080
```
### Upgrading from 4.x to 5.x
1. The `delimiters` option has been removed, any references to this will now be ignored.
2. The `classNames` option has been updated:
```udiff
{
- root: 'ReactTags',
- tagInput: 'ReactTags__tagInput',
- selected: 'ReactTags__selected',
- tag: 'ReactTags__tag',
- tagName: 'ReactTags__tagName',
- suggestions: 'ReactTags__suggestions',
- isActive: 'is-active',
- isDisabled: 'is-disabled'
+ root: 'react-tags',
+ rootFocused: 'is-focused',
+ selected: 'react-tags__selected',
+ selectedTag: 'react-tags__selected-tag',
+ selectedTagName: 'react-tags__selected-tag-name',
+ search: 'react-tags__search',
+ searchInput: 'react-tags__search-input',
+ suggestions: 'react-tags__suggestions',
+ suggestionActive: 'is-active',
+ suggestionDisabled: 'is-disabled'
}
```
For smaller changes refer to [the changelog](CHANGELOG.md).