javascript - Copy text from <span> to clipboard

Question

I've been trying to copy the innerContent of a <span> to my clipboard without success:

HTML

<span id="pwd_spn" class="password-span"></span>

JavaScript

Function Call

    document.addEventListener('DOMContentLoaded', function () {
    document.getElementById('copy').addEventListener('click', copy_password);
});

Function

function copy_password() {
    var copyText = document.getElementById("pwd_spn").select();
    document.execCommand("Copy");
}

I've also tried:

function copy_password() {
    var copyText = document.getElementById("pwd_spn").textContent;
    copyText.select();
    document.execCommand("Copy");
}

It seems like .select() doesn't work on a <span> element since I get the following error on both:

Answer 1

You could do this: create a temporary text area and append it to the page, then add the content of the span element to the text area, copy the value from the text area and remove the text area.

Because of some security restrictions you can only execute the Copy command if the user interacted with the page, so you have to add a button and copy the text after the user clicks on the button.

document.getElementById("cp_btn").addEventListener("click", copy_password);

function copy_password() {
    var copyText = document.getElementById("pwd_spn");
    var textArea = document.createElement("textarea");
    textArea.value = copyText.textContent;
    document.body.appendChild(textArea);
    textArea.select();
    document.execCommand("Copy");
    textArea.remove();
}

<span id="pwd_spn" class="password-span">Test</span>
<button id="cp_btn">Copy</button>