clipboard.js

# clipboard.js

![Build Status](https://github.com/zenorocha/clipboard.js/workflows/build/badge.svg)
![Killing Flash](https://img.shields.io/badge/killing-flash-brightgreen.svg?style=flat)

> Modern copy to clipboard. No Flash. Just 3kb gzipped.

<a href="https://clipboardjs.com/"><img width="728" src="https://cloud.githubusercontent.com/assets/398893/16165747/a0f6fc46-349a-11e6-8c9b-c5fd58d9099c.png" alt="Demo"></a>

## Why

Copying text to the clipboard shouldn't be hard. It shouldn't require dozens of steps to configure or hundreds of KBs to load. But most of all, it shouldn't depend on Flash or any bloated framework.

That's why clipboard.js exists.

## Install

You can get it on npm.

```
npm install clipboard --save
```

Or if you're not into package management, just [download a ZIP](https://github.com/zenorocha/clipboard.js/archive/master.zip) file.

## Setup

First, include the script located on the `dist` folder or load it from [a third-party CDN provider](https://github.com/zenorocha/clipboard.js/wiki/CDN-Providers).

```html
<script src="dist/clipboard.min.js"></script>
```

Now, you need to instantiate it by [passing a DOM selector](https://github.com/zenorocha/clipboard.js/blob/master/demo/constructor-selector.html#L18), [HTML element](https://github.com/zenorocha/clipboard.js/blob/master/demo/constructor-node.html#L16-L17), or [list of HTML elements](https://github.com/zenorocha/clipboard.js/blob/master/demo/constructor-nodelist.html#L18-L19).

```js
new ClipboardJS('.btn');
```

Internally, we need to fetch all elements that matches with your selector and attach event listeners for each one. But guess what? If you have hundreds of matches, this operation can consume a lot of memory.

For this reason we use [event delegation](https://stackoverflow.com/questions/1687296/what-is-dom-event-delegation) which replaces multiple event listeners with just a single listener. After all, [#perfmatters](https://twitter.com/hashtag/perfmatters).

# Usage

We're living a _declarative renaissance_, that's why we decided to take advantage of [HTML5 data attributes](https://developer.mozilla.org/en-US/docs/Web/Guide/HTML/Using_data_attributes) for better usability.

### Copy text from another element

A pretty common use case is to copy content from another element. You can do that by adding a `data-clipboard-target` attribute in your trigger element.

The value you include on this attribute needs to match another's element selector.

<a href="https://clipboardjs.com/#example-target"><img width="473" alt="example-2" src="https://cloud.githubusercontent.com/assets/398893/9983467/a4946aaa-5fb1-11e5-9780-f09fcd7ca6c8.png"></a>

```html
<!-- Target -->
<input id="foo" value="https://github.com/zenorocha/clipboard.js.git" />

<!-- Trigger -->
<button class="btn" data-clipboard-target="#foo">
  <img src="assets/clippy.svg" alt="Copy to clipboard" />
</button>
```

### Cut text from another element

Additionally, you can define a `data-clipboard-action` at