JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
Birtakım yazılar
<button class ="btn-danger "onclick="shower()">Delete</button>
<script  type="module" >
    var a =  "123" ;
    exports.a = a;

</script>
<script type="module" src="{{url_for('static', filename='1.js')}}"></script>
</body>
</html>
<!-- // this is new.html -->

JavaScript

import {a} from "/new.html"
function shower(){
alert(a);
}

//this is 1.js