how to paste string from clipboard in javascript code example

Example 1: javascript text to clipboard

function copyToClipboard(text) {
   const elem = document.createElement('textarea');
   elem.value = text;
   document.body.appendChild(elem);
   elem.select();
   document.execCommand('copy');
   document.body.removeChild(elem);
}

Example 2: javascript copy to clipboard

var copyTextarea = document.getElementById("someTextAreaToCopy");
copyTextarea.select(); //select the text area
document.execCommand("copy"); //copy to clipboard