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Copy text to the clipboard with JavaScript

See the working demo below.

Demo: How to copy text to the clipboard with JavaScript

JavaScript

This is pretty much the standard JavaScript you'll paste into your page script block - or in a .js file if you prefer.

          
            function copyTextToClipboard() {
              /* Get the text field */
              var copyText = document.getElementById("myInput");

              /* Select the text field */
              copyText.select();
              copyText.setSelectionRange(0, 99999); /* For mobile devices */

              /* Copy the text inside the text field */
              document.execCommand("copy");

              /* Alert the copied text */
              alert("Copied this text to the clipboard: " + copyText.value);
            } 
        
    

CSS

Not necessary delete/edit as required.

         
            body{
              font-size:2em;
              font-weight:bold;
            }
            input{
              font-size:50px;
            }
            button{
              font-size:50px;
            }
        
    

Conclusion

A few lines of JavaScript is all you need to copy text to the clipboard with javascript