I am totally new to web development if somebody can help me to start to use Fetch API. Can I run the HTML and vanilla JS (with JS Fetch API functionality) on my windows computer? I was looking around and found visual studio code and a live server. It looks like it can load the page on the server but still, it is not clear what kind of JS library I should include for enabling Fetch API. I just want to execute the following code on my laptop (would be nice if I don't use any JS library though I am not sure if it is possible or not)

<script>
let file = "fetch_info.txt"  //assuming the file is located in my server

fetch (file)
.then(x => x.text())
.then(y => document.getElementById("demo").innerHTML = y);
</script>