Usage
First, you need to instantiate it using a DOM selector. This selector corresponds to the trigger element, i.e. <button>.
new Clipboard('.btn');
Copy text from attribute
The easiest way to copy some content to the clipboard, is to include a data-text attribute in your trigger element.
<!-- Trigger -->
<button class="btn" data-text="Heya!">Copy</button>
Copy text from another element
Alternatively, you can copy content from another element by adding a data-target attribute in your trigger element.
The value you include on this attribute needs to match another's element id attribute.
<!-- Target -->
<input id="foo" value="https://git.io/vn3cM">
<!-- Trigger -->
<button class="btn" data-target="foo">Copy</button>
Cut text from another element
Additionally, you can define a data-action attribute to specify if you want to either copy or cut content.
If you omit this attribute, copy will be used by default.
<!-- Target -->
<textarea id="bar">clipboard.js rocks!</textarea>
<!-- Trigger -->
<button class="btn" data-action="cut" data-target="bar">
Copy
</button>
As you may expect, the cut action only works on <input> or <textarea> elements.