https://lakeshorearts.ca/wp-content/themes/norebro-child/src/js/copylink.js

1document.addEventListener("DOMContentLoaded", () =>  {  
2  let copyStringToClipboard = (str) => {
3    // Create new element
4    let el = document.createElement('textarea');
5    // Set value (string to be copied)
6    el.value = str;
7    // Set non-editable to avoid focus and move outside of view
8    el.setAttribute('readonly', '');
9    el.style = {position: 'absolute', left: '-9999px'};
10    document.body.appendChild(el);
11    // Select text inside element
12    el.select();
13    // Copy text to clipboard
14    document.execCommand('copy');
15    // Remove temporary element
16    document.body.removeChild(el);
17 }
18
19  let emailLinks = document.querySelectorAll("[href*='mailto:']"); 
20  try {
21    for (let link of emailLinks) {
22      // let copy = link.getAttribute("href")
23      link.removeAttribute("href")
24      link.addEventListener("click", ()=>{
25        copyStringToClipboard(link.innerHTML)
26        link.parentNode.classList.add("copied")
27        setTimeout(()=>{link.parentNode.classList.remove("copied")}, 800)
28      })
29    }
30  }
31  catch(err) {
32    console.log("There's no emaillinks to copy in this page")
33  }
34})