we use The copy to clipboard functionality many times daily. A very common need when building websites is the ability to copy text to clipboard with a single button click. Javascript can easily do this in short steps:

1. create an <input> element to be appended to the document like this and add a Button where you can call your Javascript Function

<input type="text" value="Text to copy" id="myInput" />

<button onclick="copyWithOneClick()">Copy text</button>

Now in your Javascript Function :

2. call the getElementById()method with your input ID in our case its "myInput" .
3. Use HTMLInputElement.select() to select the contents of the <input> element.
4. Use Document.execCommand('copy') to copy the contents of the <input> to the clipboard

your final Javascript function will look like this

function copyWithOneClick() {
  var copyText = document.getElementById("myInput");
  copyText.select();
  copyText.setSelectionRange(0, 99999);
  document.execCommand("copy");
}