as[0].style.color = "red";
'red'
for(let k of as){k.style.color="green";}
'green'
for(let k of as){k.style.color="lightgreen";}
'lightgreen'
let quack = document.querySelector("p")
undefined
quack
<p>​blah​</p>​
quack.style.fontSize="100px"
'100px'