Copy to the clipboard in javascript

Snippet javascript Copy to the clipboard with js

function copyLinkPost(e) {
    const el = document.createElement('textarea');
    let str = e.target.getAttribute('data-link-copy');

    console.log(str);

    el.value = str;
    el.setAttribute('readonly', '');
    el.style.position = 'absolute';
    el.style.left = '-9999px';
    document.body.appendChild(el);
    el.select();

    el.setSelectionRange(0, 99999)
    document.execCommand("copy");
    document.body.removeChild(el);
    console.log("Copied the text: " + el.value);
}