<button class="trigger" data-text="Hello">Скопировать</button>const button = document.querySelector(".trigger");
const dataText = button.dataset.text.trim();
button.addEventListener('click', e => {
  if(!dataText.length) return;
  
  navigator.clipboard.writeText(dataText)
    .then(() => console.log("Done!"))
    .catch(err => console.error(err))
})