How to pass parameters from main process to render processes in Electron

Question

I have an Electron app that can open different windows.

On app launch the app open a set of window(s) (that load the same HTML and JS files) but with params to change ea

Answer 1

Using query string along with win.loadFile(),

// main process or renderer process 1
data = {"age": 12, "healthy": true}

let win = new BrowserWindow({
        webPreferences: {
          nodeIntegration: true
        }
      });

win.loadFile("public/print.html", {query: {"data": JSON.stringify(data)}});

// renderer process 2
const querystring = require('querystring');
let query = querystring.parse(global.location.search);
let data = JSON.parse(query['?data'])