I get this error when trying to run the page...
import React from "react";
import reactDom from "react-dom";
const element = <h1>Hello World</h1>;
ReactDOM.render(element, document.getElementById('root'));
I think this is a syntax error, reactDom is not the same as ReactDom can you try:
import React from "react";
import ReactDom from "react-dom";
const element = <h1>Hello World</h1>;
ReactDom.render(element, document.getElementById("root"));