I am trying to do a chrome extension but I cant reach element

<ul class="card_csgo>
    <li>
    ....
    </li>
    <li>
    ....
    </li>
</ul>    

I want to reach in of li’s
`

const uls = document.getElementsByClassName("card_csgo")
const lis = uls.getElementsByTagName("li")

if (uls) {
    console.log(lis)
}

Thats the code I write

Uncaught TypeError: uls.getElementsByTagName is not a function
    at buff.js:2:17
(anonymous) @ buff.js:2

`
Thats the error I get

I want to get text in li