react-clamp-lines

Responsive and accessible clamping component with «Read more»/«Read less» buttons built for React. Extended to display HTML text too.

Demo

React Clamp Lines

Install

npm i react-clamp-lines

Features

built for React with no dependencies
option for «Read more» and «Read less» buttons
customizable ellipsis text
customizable CSS classes
responsive
accessible
window resize event debounced — and why it's important

If your web app uses JavaScript to accomplish taxing tasks, a debounce function is essential to ensuring a given task doesn't fire so often that it bricks browser performance. . Extended to allow the rendering of HTML

Usage

import React, { Component } from 'react';
import ReactDOM from 'react-dom';
import ClampLines from 'react-clamp-lines';

class App extends Component {
  render() {
    return (
      <ClampLines
        text={text_to_clamp}
        id="really-unique-id"
        lines={4}
        ellipsis="..."
        moreText="Expand"
        lessText="Collapse"
        className="custom-class"
        innerElement="p"
        html="false"
      />
    );
  }
}

ReactDOM.render(<App />, document.getElementById('clamp'));

The component and the or «Read more» button always have the clamp-lines and clamp-lines__button CSS classes respectively. In the example above the custom-class will be added to clamp-lines, so the output will be:

<div class="clamp-lines custom-class">
  <p 
    id="clamped-content-really-unique-id"
    aria-hidden="true"
  >
    clamped text here...
  </p>
  <button 
    class="clamp-lines__button"
    aria-controls="clamped-content-really-unique-id"
    aria-expanded="false"
  >
    Expand
  </button>
</div>

API

List of all available props with their default values and description.

<ClampLines
  text={String}
  id={String}
  lines={Number}
  ellipsis={String}
  buttons={Boolean}
  moreText={String}
  lessText={String}
  className={String}
  delay={Number}
  stopPropagation={Boolean}
  innerElement={String}
  html={Boolean}
/>

prop	required	type	default value	description
text	*	{String}		Text you wish to clamp
id	*	{String}		Unique id (used for ARIA props)
lines		{Number}	`3`	Number of visible lines
ellipsis		{String}	`...`	Text content for the ellipsis - will appear after the clamped lines
buttons		{Boolean}	`true`	The «Read more» and «Read less» buttons
moreText		{String}	`Read more`	«Read more» button value
lessText		{String}	`Read less`	«Read less» button value
className		{String}		CSS class names added to component
delay		{Number}	`300`	Milliseconds, the function is waiting before being triggered, after it stops being called
stopPropagation		{Boolean}	`false`	Prevents the event from bubbling up the DOM tree when clicked on the «Read more» button
innerElement		{String}	`div`	Custom inner element for clamped text. This MUST be a block level element or styled as one.
html		{Boolean}	`false`	Flag depicting if text should be html rendered

License

Anyone is free to copy, modify, publish, use, compile, sell, or distribute this software, either in source code form or as a compiled binary, for any purpose, commercial or non-commercial, and by any means.

See Unlicense for full details.