A Simple Electron App with a Button that calls a function reports to the console

/*
Hello everyone, I am working for the first time with electron. I have used JavaScript before. Can someone please show me what I am doing wrong trying to get the button onclick event to call a simple function with a console.log operation in it. Any help would be appreciated because I am not sure where all the pieces go together.

Here’s my code:
*/

// main.js
const { app, BrowserWindow, ipcMain } = require("electron");

let win = null;

const createWindow = () => {
  win = new BrowserWindow({
    width: 800,
    height: 600,
    resizable: false,
    webPreferences: {
      nodeIntegration: true
    }
  });

  win.loadFile("index.html");
};

app.whenReady().then(createWindow);

ipcMain.on("callMyFunction", (event, data) => { 
  // Prints inside the label called funcCallTxt
  funcCallTxt.innerHTML =  "This event: " + event + " and This data: " + data;

  // Writes to the console just to see what in the variables
  console.log("This event: " + event + " and This data: " + data) 
});



// renderer.js
const { contextBridge, ipcRenderer } = require("electron");

contextBridge.exposeInMainWorld("electron", {
    send: (channel, payload) => ipcRenderer.send(channel, payload),
});


// index.html
<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1.0">
        <script defer src="renderer.js"></script>
        <title>Call a Function</title>
    </head>
    <body>
        <h1>A Function Call</h1>
        <label for="funcCallTxt"></label>                
        <button type="button" onclick="callMyFunction()">Call My Function</button>
    </body>
</html>