Hot module reload prototype

hmr.js

import inspector from "inspector";

const url2scriptid = new Map<string, string>();

const session = new inspector.Session();
session.connect();

setupDebugger();

function setupDebugger() {
  session.post("Debugger.enable", () => {
    subscribeToScriptId();
  });
}

function subscribeToScriptId() {
  session.on("Debugger.scriptParsed", message => {
    console.log("scriptParsed", [message.params.url, message.params.scriptId]);
    url2scriptid.set(message.params.url, message.params.scriptId);
  });
}

function reloadModule(url: string) {
  console.log("reload", url);

  session.post(
    "Debugger.setScriptSource",
    {
      scriptId: url2scriptid.get(url),
      scriptSource: `<new code>`
    },
    (error, result) => {
      if (!error) {
        console.log("Hot reload successful", result);
      } else {
        console.log("Hot reload failed", result);
      }
    }
  );
}

export { reloadModule };