renderer.js

// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

const { ipcRenderer } = require('electron');
const process = require('process');

document.addEventListener('DOMContentLoaded', () => {
  const versionDiv = document.createElement('div');
  versionDiv.style.position = 'fixed';
  versionDiv.style.bottom = '10px';
  versionDiv.style.left = '10px';
  versionDiv.innerText = 'Electron version: ' + process.versions.electron;
  document.body.appendChild(versionDiv);
});

ipcRenderer.on('topic-received', function (event, response) {
  document.getElementById('received-topic').innerText = response;
});

document.getElementById('publish-topic').addEventListener('click', () => {
  const topic = document.getElementById('topic-input').value;
  ipcRenderer.send('publish-topic', topic);
});