Want to invoke variables defined in preload from the Electron render process

const{app, BrowserWindow, ipcMain}=require("electron");
const path=require("path");

let mainWindow;

const createWindow=()=>{
  mainWindow = new BrowserWindow({
    width —800,
    height —600,
    useContentSize: true,
    webPreferences: {
      nodeIntegration: false,
      contextIsolation: true,
      preload: path.join(__dirname, "preload.js"),
    },
  });

  mainWindow.loadFile("index.html");
  mainWindow.webContents.openDevTools();
  mainWindow.on("closed",()=>{
    mainWindow = null;
  });
};

const{contextBridge}=require('electron')

contextBridge.exoseInMainWorld('myAPI',{
  desktop —true
})

...
<script src="./render.js"></script>
...

 console.log (window.myAPI)