# React-Truncate [![NPM version][npm-image]][npm-url] [![Downloads][downloads-image]][npm-url] [![Build status][travis-image]][travis-url] [![Coverage status][coveralls-image]][coveralls-url] [![Dependency status][david-dm-image]][david-dm-url] [![Dev dependency status][david-dm-dev-image]][david-dm-dev-url] ## Install ``` $ npm install react-truncate ``` ## Usage ```js import Truncate from 'react-truncate'; // ... class Foo extends Component { render() { return ( ... Read more}> {longText} ); } } ``` Hint: (Generally with React) if you want to preserve newlines from plain text, you need to do as follows: ```js //... {text.split('\n').map((line, i, arr) => { const line = {line}; if (i === arr.length - 1) { return line; } else { return [line,
]; } })} //... ``` ## API | Prop | Type | Default | Description | Example | | ---- | ---- | ------- | ----------- | ------- | | lines | integer, boolean {false} | `1` | Specifies how many lines of text should be preserved until it gets truncated. `false` and any integer < 1 will result in the text not getting clipped at all. | (`false`, `-1`, `0`), `1`, ... | | ellipsis | string, React node | `'…'` | An ellipsis that is added to the end of the text in case it is truncated. | `'...'`, `...`, `... Read more`, `[Some, siblings]` | children | string, React node | | The text to be truncated. Anything that can be evaluated as text. | `'Some text'`, `

Some paragraph with other text-based inline elements

`, `Somesiblings` | | trimWhitespace | boolean | `false` | If `true`, whitespace will be removed from before the ellipsis (e.g. `words ...` will become `words...` instead) | `{longText}` | | width | number | `0` | If not `0`, the calculation of the content will be based on this number. | `{longText}` | | onTruncate | function | | Gets invoked on each render. Gets called with `true` when text got truncated and ellipsis was injected, and with `false` otherwise. | `isTruncated => isTruncated !== this.state.isTruncated && this.setState({ isTruncated })` | ## Known issues - Resize content when the **size** of **parent container changed** (use the `width` property or call `ref.onResize()`). See [issue](https://github.com/One-com/react-truncate/issues/49) - Text exceeding horizontal boundaries when "viewport" meta tag is not set accordingly for **mobile** devices (font boosting leads to **wrong calculations**). See [issue](https://github.com/One-com/react-truncate/issues/4#issuecomment-226703499) - Output in plain text only - no support for **markup/HTML**. See [issue](https://github.com/One-com/react-truncate/issues/8) - Wrong line breaks when **custom font** is loading after the component has rendered. See [issue](https://github.com/One-com/react-truncate/issues/16) - No support for **letter spacing** / **word spacing**. See [issue](https://github.com/One-com/react-truncate/issues/59) ## Integrated example for toggling "read more" text ```js import React, { Component } from 'react'; import PropTypes from 'prop-types'; import Truncate from 'react-truncate'; class ReadMore extends Component { constructor(...args) { super(...args); this.state = { expanded: false, truncated: false }; this.handleTruncate = this.handleTruncate.bind(this); this.toggleLines = this.toggleLines.bind(this); } handleTruncate(truncated) { if (this.state.truncated !== truncated) { this.setState({ truncated }); } } toggleLines(event) { event.preventDefault(); this.setState({ expanded: !this.state.expanded }); } render() { const { children, more, less, lines } = this.props; const { expanded, truncated } = this.state; return (

... {more} )} onTruncate={this.handleTruncate} > {children} {!truncated && expanded && ( {less} )}

); } } ReadMore.defaultProps = { lines: 3, more: 'Read more', less: 'Show less' }; ReadMore.propTypes = { children: PropTypes.node.isRequired, lines: PropTypes.number, less: PropTypes.string, more: PropTypes.string }; export default ReadMore; ``` ## Developing Install system libraries needed for development dependencies - https://github.com/Automattic/node-canvas#installation Install development dependencies ``` $ npm install ``` Run tests ``` $ npm test ``` Run code linter ``` $ npm run lint ``` Compile to ES5 from /src to /lib ``` $ npm run compile ``` [npm-url]:https://npmjs.org/package/react-truncate [downloads-image]:http://img.shields.io/npm/dm/react-truncate.svg [npm-image]:https://badge.fury.io/js/react-truncate.svg [travis-url]:https://travis-ci.org/One-com/react-truncate [travis-image]:https://travis-ci.org/One-com/react-truncate.svg?branch=master [coveralls-url]:https://coveralls.io/r/One-com/react-truncate [coveralls-image]:https://coveralls.io/repos/One-com/react-truncate/badge.svg [david-dm-url]:https://david-dm.org/One-com/react-truncate [david-dm-image]:https://david-dm.org/One-com/react-truncate.svg [david-dm-dev-url]:https://david-dm.org/One-com/react-truncate#info=devDependencies [david-dm-dev-image]:https://david-dm.org/One-com/react-truncate/dev-status.svg

	Stars	Issues	Version	Updated	Created
react-dotdotdot	400	17	1.3.1	5 years ago	9 years ago
react-lines-ellipsis	616	22	0.15.4	a year ago	8 years ago
react-text-truncate	325	24	0.19.0	2 years ago	9 years ago
react-truncate	586	53	2.4.0	6 years ago	8 years ago
react-truncate-html	50	11	0.1.7	7 years ago	8 years ago

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