Add copyToClipboard

snippets/copyToClipboard.md

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+### copyToClipboard
+
+Copy a string to the clipboard.
+
+Create a new `<textarea>` element, fill it with the supplied data and add it to the HTML document.
+Use `document.execCommand('copy')` to copy to the clipboard.
+Finally, remove the `<textarea>` element from the HTML document.
+
+```js
+const copyToClipboard = str => {
+  const el = document.createElement('textarea');
+  el.value = str;
+  el.setAttribute('readonly', '');
+  document.body.appendChild(el);
+  el.select();
+  document.execCommand('copy');
+  document.body.removeChild(el);
+}
+```
+
+```js
+copyToClipboard('Lorem ipsum'); // 'Lorem ipsum' copied to clipboard.
+```