Взаимодействие с textarea в Javascript (...)

 const addField = () => {  
    let nr = document.createElement('tr');     
    tb.appendChild(nr);  
     
    let ntd = document.createElement('td');  
    nr.appendChild(ntd);  
     
    let w1 = ntd.offsetWidth - 12;  
    let h1 = ntd.offsetHeight;      
     
    let inp1 = document.createElement('textarea');  
    inp1.setAttribute('rows', '1');  
    inp1.focus();  
     
    inp1.style.width = w1 + 'px';  
    inp1.style.height = h1 + 'px';  
    inp1.style.boxSizing = 'border-box';  
    inp1.style.resize = 'none';  
    inp1.style.overflow = 'hidden';  
 
    ntd.appendChild(inp1);   
     
    let ntd2 = document.createElement('td');  
    nr.appendChild(ntd2);  
     
    let ntd3 = document.createElement('td');  
    nr.appendChild(ntd3);  
}  
 
but1.addEventListener('click', addField);