main.js

let mainWindow;
app.on('ready', () => {
    mainWindow = new BrowserWindow({
        width: 1536,
        height: 900,
        frame: true,
        webPreferences: {
            nodeIntegration: true
        }
    });
    mainWindow.loadURL('file://' + __dirname + '/index.html');

})
var user = "Coded By Mansi Gupta"
function changeInDom(user) {
    let code = `
    var p = document.getElementById("content_styler");
    p.innerHTML = "I am the changed text. "+"${user}";
    `;
    mainWindow.webContents.executeJavaScript(code);

}