<html>
<input type="text" value="Hello world"(Can be of your choice) id="myInput"(id is the name of the text, you can change it later)
<button onclick="Hello()">Copy Text</button>
<script>
function Hello() {
var copyText = document.getElementById('myInput')
copyText.select();
document.execCommand('copy')
console.log('Copied Text')
}
</script>