Copy to clipboard as typing

copy2clipboard.js

document.querySelector("input").addEventListener('keyup',function(){    
    var pom=document.createElement("textarea");
    document.body.appendChild(pom);
    pom.value=this.value;
    pom.select();
    try {
        document.execCommand('copy');
        pom.parentNode.removeChild(pom);
        this.focus();
    }
    catch (err) {
        console.log(err);
    }
});