testcase for https://github.com/electron/electron/issues/28270

main.js

(async () => {
  const {app, BrowserWindow} = require("electron");

  await app.whenReady()

  const window = new BrowserWindow();
  await window.loadURL("https://google.com");
  window.webContents.print(
    {
      margins: {
                marginType: "custom",  //change to "default" will redisplay the header and footer
                top: 0.75,
                left: 0.75,
                right: 0.75,
                bottom: 0.75
            },
      header: "I am header",
      footer: "I am footer",
    });
})();