js

encode(string)

html

<p class="source">This is a sample paragraph.</p>
<p class="result">Encoded result:</p>

js

const sourcePara = document.querySelector(".source");
const resultPara = document.querySelector(".result");
const string = sourcePara.textContent;

const textEncoder = new TextEncoder();

let encoded = textEncoder.encode(string);
resultPara.textContent += encoded;