here i want to use fs library at the js file to create and edit a json file. but whenever i include this namespace an strange error comes up. if i use

var fs = require("fs")

it throws the error:

Uncaught ReferenceError: require is not defined

if i use (in terms of any order)

import fs from "fs"

then it throws

Uncaught SyntaxError: import declarations may only appear at top level of a module

i even have tried using the require.js file but in that case it throws those errors:

Uncaught Error: Module name "fs" has not been loaded yet for context: _. Use require([])

now if i use require(["fs"]) it says:

Uncaught SyntaxError: expected expression, got '<'

and a few seconds later

Uncaught Error: Load timeout for modules: fs

i even have tried to create another js file in the separate folder and use the require in that too but it still doesn't work.