React Tag Autocomplete

React Tag Autocomplete is a simple tagging component ready to drop in your React projects. Originally based on the React Tags project 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 >= 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.

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 (
      <ReactTags
        tags={this.state.tags}
        suggestions={this.state.suggestions}
        handleDelete={this.handleDelete.bind(this)}
        handleAddition={this.handleAddition.bind(this)} />
    )
  }
}

React.render(<App />, document.getElementById('app'))

Options

• tags
• suggestions
• placeholder
• autofocus
• autoresize
• delimiters
• delimiterChars
• minQueryLength
• maxSuggestionsLength
• classNames
• handleAddition
• handleDelete
• handleInputChange
• handleFocus
• handleBlur
• handleValidate
• addOnBlur
• allowNew
• tagComponent
• inputAttributes

tags (optional)

An array of tags that are displayed as pre-selected. Each tag must have an id and a name property. Default: [].

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: [].

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:

{
  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.

function handleAddition(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.

function handleDelete(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.

function handleInputChange(input) {
  if (!this.state.busy) {
    this.setState({ busy: true })

    return fetch(`query=${input}`).then((result) => {
      this.setState({ busy: false })
    })
  }
}

handleFocus (optional)

Optional event handler when the input receives focus. Receives no arguments.

handleBlur (optional)

Optional event handler when focus on the input is lost. Receives no arguments.

handleValidate (optional)

Optional validation function that determines if tag should be added to tags. Receives a tag object. Should return a boolean.

function handleValidate(tag) {
  return tag.name.length >= 5;
}

addOnBlur (optional)

Creates a tag from the current input value when focus on the input is lost. Default: 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.

inputAttributes (optional)

An object containing additional attributes that will be applied to the underlying <input /> field.

As an example inputAttributes={{ maxLength: 10 }} would be applied as <input maxlength="10" … />. Note this prop won't overwrite existing attributes, it can only add new ones.

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 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:

{
-  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.