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/* global clipboard */
/* eslint-disable no-console */
function addCopyButtons(clipboard) {
document.querySelectorAll('pre > code').forEach(function (codeBlock) {
var button = document.createElement('button');
button.className = 'copy-code-button';
button.type = 'button';
button.innerText = 'Copy';
button.addEventListener('click', function () {
clipboard.writeText(codeBlock.innerText).then(function () {
/* Chrome doesn't seem to blur automatically,
leaving the button in a focused state. */
button.blur();
button.innerText = 'Copied!';
setTimeout(function () {
button.innerText = 'Copy';
}, 2000);
}, function (error) {
button.innerText = 'Error';
});
});
var pre = codeBlock.parentNode;
if (pre.parentNode.classList.contains('highlight')) {
var highlight = pre.parentNode;
highlight.parentNode.insertBefore(button, highlight);
} else {
pre.parentNode.insertBefore(button, pre);
}
});
}
if (navigator && navigator.clipboard) {
addCopyButtons(navigator.clipboard);
} else {
var script = document.createElement('script');
script.src =
'https://cdnjs.cloudflare.com/ajax/libs/clipboard-polyfill/2.7.0/clipboard-polyfill.promise.js';
script.integrity = 'sha256-waClS2re9NUbXRsryKoof+F9qc1gjjIhc2eT7ZbIv94=';
script.crossOrigin = 'anonymous';
script.onload = function () {
addCopyButtons(clipboard);
};
document.body.appendChild(script);
}
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