Awesome

Copy to clipboard

https://cdn.jsdelivr.net/gh/hchiam/clipboard@main/copyToClipboard.js

or:

https://cdn.jsdelivr.net/gh/hchiam/clipboard@4.2.2/copyToClipboard.js

<script
  src="https://cdn.jsdelivr.net/gh/hchiam/clipboard@4.2.2/copyToClipboard.js"
  integrity="sha384-kTmfQ7wwfsEzNeNZribBUcU8jR901xfR3G7KJ6O8hsP0yBV6beN6lxMlfNu4EWiL"
  crossorigin="anonymous"
></script>

Example usage:

Live CodePen demo

or

See demo.html

or

<pre onclick="handleClick(this.innerText)">some code or text to be copied</pre>

<script type="text/javascript">
  function handleClick(text) {
    copyToClipboard(text, function () {
      alert("Copied code to clipboard!");
    });
  }
</script>

or:

var parentElement = document.querySelector("#container");
var text = `body:before {
  z-index: 9001;
}`;
var callback = function () {
  alert("Copied code to clipboard!");
};
createElementToClickToCopyToClipboard(parentElement, text, callback);

or:

var selectorString = "#container";
var text = `body:before {
  z-index: 9001;
}`;
var callback = function () {
  alert("Copied code to clipboard!");
};
createElementToClickToCopyToClipboard(selectorString, text, callback);

or simply:

// text can be automatically pulled from the parentElement:
var parentElement = document.querySelector("#container");
createElementToClickToCopyToClipboard(parentElement, function (code) {
  alert("Copied code to clipboard! \n\n" + text);
});