andrejzg / react-mentions

@mention people in a textarea

React Mentions

A React component that let's you mention people in a textarea like you are used to on Facebook or Twitter.

Used in production at Signavio, State, Snips, Swat.io, GotDone, Volinspire, Marvin, Timely, GuideFitter, Evite, Publer, Kontentino, Wix.com, Highlight and you?

Getting started

Install the react-mentions package via npm:

npm install react-mentions --save

Or yarn:

yarn add react-mentions

The package exports two React components for rendering the mentions textarea:

import { MentionsInput, Mention } from 'react-mentions'

MentionsInput is the main component rendering the textarea control. It takes one or multiple Mention components as its children. Each Mention component represents a data source for a specific class of mentionable objects, such as users, template variables, issues, etc.

Example:

<MentionsInput value={this.state.value} onChange={this.handleChange}>
  <Mention
    trigger="@"
    data={this.props.users}
    renderSuggestion={this.renderUserSuggestion}
  />
  <Mention
    trigger="#"
    data={this.requestTag}
    renderSuggestion={this.renderTagSuggestion}
  />
</MentionsInput>

You can find more examples here: demo/src/examples

Configuration

The MentionsInput supports the following props for configuring the widget:

Prop name	Type	Default value	Description
value	string	''	The value containing markup for mentions
onChange	function (event, newValue, newPlainTextValue, mentions)	empty function	A callback that is invoked when the user changes the value in the mentions input
onKeyDown	function (event)	empty function	A callback that is invoked when the user presses a key in the mentions input
singleLine	boolean	false	Renders a single line text input instead of a textarea, if set to true
onBlur	function (event, clickedSuggestion)	empty function	Passes true as second argument if the blur was caused by a mousedown on a suggestion
allowSpaceInQuery	boolean	false	Keep suggestions open even if the user separates keywords with spaces.
suggestionsPortalHost	DOM Element	undefined	Render suggestions into the DOM in the supplied host element.
inputRef	React ref	undefined	Accepts a React ref to forward to the underlying input element
allowSuggestionsAboveCursor	boolean	false	Renders the SuggestionList above the cursor if there is not enough space below
forceSuggestionsAboveCursor	boolean	false	Forces the SuggestionList to be rendered above the cursor
a11ySuggestionsListLabel	string	''	This label would be exposed to screen readers when suggestion popup appears
customSuggestionsContainer	function(children)	empty function	Allows customizing the container of the suggestions

Each data source is configured using a Mention component, which has the following props:

Prop name	Type	Default value	Description
trigger	regexp or string	'@'	Defines the char sequence upon which to trigger querying the data source
data	array or function (search, callback)	null	An array of the mentionable data entries (objects with id & display keys, or a filtering function that returns an array based on a query parameter
renderSuggestion	function (entry, search, highlightedDisplay, index, focused)	null	Allows customizing how mention suggestions are rendered (optional)
markup	string	'@[__display__](__id__)'	A template string for the markup to use for mentions
displayTransform	function (id, display)	returns display	Accepts a function for customizing the string that is displayed for a mention
regex	RegExp	automatically derived from markup pattern	Allows providing a custom regular expression for parsing your markup and extracting the placeholder interpolations (optional)
onAdd	function (id, display, startPos, endPos)	empty function	Callback invoked when a suggestion has been added (optional)
appendSpaceOnAdd	boolean	false	Append a space when a suggestion has been added (optional)

If a function is passed as the data prop, that function will be called with the current search query as first, and a callback function as second argument. The callback can be used to provide results asynchronously, e.g., after fetch requests. (It can even be called multiple times to update the list of suggestions.)

Styling

react-mentions supports css, css modules, and inline styles. It is shipped with only some essential inline style definitions and without any css. Some example inline styles demonstrating how to customize the appearance of the MentionsInput can be found at demo/src/examples/defaultStyle.js.

If you want to use css, simply assign a className prop to MentionsInput. All DOM nodes rendered by the component will then receive class name attributes that are derived from the base class name you provided.

If you want to avoid global class names and use css modules instead, you can provide the automatically generated class names as classNames to the MentionsInput. See demo/src/examples/CssModules.js for an example of using react-mentions with css modules.

You can also assign className and style props to the Mention elements to define how to highlight the mentioned words.

Testing

Due to react-mentions' internal cursor tracking it is not good enough to simulate the editing of the textarea value using ReactTestUtils.Simulate.change. We recommend using @testing-library/user-event for a realistic simulation of events as they would happen in the browser as the user interacts the textarea.

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If you want to contribute, first of all: thank you ❤️. Please check CONTRIBUTING.md and/or create an issue.