How to create multiple javascripts have the same notification

Here are two JavaScripts. There is also a notification script.
I want to combine two javascripts in one and have both javascripts show the same notification.

This is the two different javascripts with the same notification.

<script>
function copy(that){
  var text = that.textContent;
  var input = document.getElementById('cb');
  input.value = input.value + text +'n';
  var inp =document.createElement('input');
document.body.appendChild(inp)
inp.value =that.textContent
inp.select();
    document.execCommand('copy',false);

var notification = document.getElementById('symc');
    notification.style.display = 'block';
    setTimeout(() => {
        notification.style.display = 'none';
     }, 1000);
}
</script>

<script>
function co() {
  var input = document.getElementById("cb");
  navigator.clipboard.writeText(input.value);

var notification = document.getElementById('symc');
    notification.style.display = 'block';
    setTimeout(() => {
        notification.style.display = 'none';
     }, 1000);
}
</script>

<span id="symc">Copied</span>

<div id="ca">
<input id="cb">
<button onclick="co()">Copy</button>
</div>

This is the notification script

var notification = document.getElementById('symc');
    notification.style.display = 'block';
    setTimeout(() => {
        notification.style.display = 'none';
     }, 1000);

Please help me how can I mix two script in one js area…

<script>

</script>

Thanks.