$ npm install --save @github/clipboard-copy-element

import '@github/clipboard-copy-element'

<script type="module" src="./node_modules/@github/clipboard-copy-element/dist/index.js">

<clipboard-copy for="blob-path" class="btn btn-sm BtnGroup-item">
  Copy path
</clipboard-copy>
<div id="blob-path">src/index.js</div>

<clipboard-copy value="src/index.js">Copy</clipboard-copy>

<clipboard-copy for="blob-path">Copy</clipboard-copy>
<div id="blob-path">src/index.js</div>

<clipboard-copy for="blob-path">Copy</clipboard-copy>
<input id="blob-path" value="src/index.js">

<clipboard-copy for="blob-path">Copy full URL</clipboard-copy>
<a id="blob-path" href="/path/to#my-blob">Link text will not be copied</a>

document.addEventListener('clipboard-copy', function(event) {
  const button = event.target
  button.classList.add('highlight')
})

npm install
npm test