Question

我尝试在反应应用中导入ipcRenderer

import {ipcRenderer} from 'electron';

但是我收到此错误消息：未定义require

Answer 1

您需要使用

const { ipcRenderer } = window.require("electron");

否则它会尝试从Webpack或您使用的任何内容导入它。

您可以查看此帖子以获得更好的解释：

https://github.com/electron/electron/issues/7300

Answer 2

您将要遵循我在this comment中概述的步骤。这些步骤确保电子应用程序中的安全性。

main.js

const {
  app,
  BrowserWindow,
  ipcMain
} = require("electron");
const path = require("path");
const fs = require("fs");

// Keep a global reference of the window object, if you don't, the window will
// be closed automatically when the JavaScript object is garbage collected.
let win;

async function createWindow() {

  // Create the browser window.
  win = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      nodeIntegration: false, // is default value after Electron v5
      contextIsolation: true, // protect against prototype pollution
      enableRemoteModule: false, // turn off remote
      preload: path.join(__dirname, "preload.js") // use a preload script
    }
  });

  // Load app
  win.loadFile(path.join(__dirname, "dist/index.html"));

  // rest of code..
}

app.on("ready", createWindow);

ipcMain.on("toMain", (event, args) => {
  fs.readFile("path/to/file", (error, data) => {
    // Do something with file contents

    // Send result back to renderer process
    win.webContents.send("fromMain", responseObj);
  });
});

preload.js

const {
    contextBridge,
    ipcRenderer
} = require("electron");

// Expose protected methods that allow the renderer process to use
// the ipcRenderer without exposing the entire object
contextBridge.exposeInMainWorld(
    "api", {
        send: (channel, data) => {
            // whitelist channels
            let validChannels = ["toMain"];
            if (validChannels.includes(channel)) {
                ipcRenderer.send(channel, data);
            }
        },
        receive: (channel, func) => {
            let validChannels = ["fromMain"];
            if (validChannels.includes(channel)) {
                // Deliberately strip event as it includes `sender` 
                ipcRenderer.on(channel, (event, ...args) => fn(...args));
            }
        }
    }
);

index.html

<!doctype html>
<html lang="en-US">
<head>
    <meta charset="utf-8"/>
    <title>Title</title>
</head>
<body>
    <script>
        window.api.receive("fromMain", (data) => {
            console.log(`Received ${data} from main process`);
        });
        window.api.send("toMain", "some data");
    </script>
</body>
</html>

Answer 3

const {ipcRenderer} = require（＆＃39; electron＆＃39;）

Answer 4

如果您希望在反应成分中的电子中快速尝试IPC，这可能会有所帮助。

main.js

const {ipcMain} = require('electron')

ipcMain.on('asynchronous-message', (event, arg) => {
  console.log("heyyyy",arg) // prints "heyyyy ping"
})

App.js

import React from 'react';
import './App.css';
const { ipcRenderer } = window.require('electron');


function App() {
  return (
    <div className="App">
       <button onClick={()=>{
         ipcRenderer.send('asynchronous-message', 'ping')
         }}>Com</button>
    </div>
  );
}

export default App;

输出：

进行更改后，请不要忘记重新运行应用程序。

未添加preload.js，未更改webpack配置中的任何内容，未执行其他配置。

Answer 5

下面是使用 const addUserAction: Actions.User.Add = .... const removeUserAction: Actions.User.Remove = ... 和 electron-forge 和预加载脚本使用 react检查下面的 package.json 代码）选项。按照链接为 electron-forge with react 创建项目。

main.js

ipcRenderer

package.json

webpack

app.jsx

preload

preload.js

const { app, BrowserWindow, ipcMain, Notification } = require("electron");
const path = require("path");

// Handle creating/removing shortcuts on Windows when installing/uninstalling.
if (require("electron-squirrel-startup")) {
  // eslint-disable-line global-require
  app.quit();
}

const createWindow = () => {
  console.log(__dirname, "testing");
  // Create the browser window.
  const mainWindow = new BrowserWindow({
    width: 800,
    height: 600,
    webPreferences: {
      nodeIntegration: false,
      contextIsolation: true,
      worldSafeExecuteJavaScript: true,
      preload: MAIN_WINDOW_PRELOAD_WEBPACK_ENTRY,
    },
  });

  // and load the index.html of the app.
  mainWindow.loadURL(MAIN_WINDOW_WEBPACK_ENTRY);

  // Open the DevTools.
  mainWindow.webContents.openDevTools();
};

// This method will be called when Electron has finished
// initialization and is ready to create browser windows.
// Some APIs can only be used after this event occurs.
app.on("ready", () => {
  console.log("/n demo", __dirname, "/n");
  createWindow();
});

ipcMain.on("notify", (_, message) => {
  new Notification({ title: "Notification", body: message }).show();
});
// Quit when all windows are closed, except on macOS. There, it's common
// for applications and their menu bar to stay active until the user quits
// explicitly with Cmd + Q.
app.on("window-all-closed", () => {
  if (process.platform !== "darwin") {
    app.quit();
  }
});

app.on("activate", () => {
  // On OS X it's common to re-create a window in the app when the
  // dock icon is clicked and there are no other windows open.
  if (BrowserWindow.getAllWindows().length === 0) {
    createWindow();
  }
});

// In this file you can include the rest of your app's specific main process
// code. You can also put them in separate files and import them here.

renderer.js

{
  "name": "webex-ui",
  "productName": "webex-ui",
  "version": "1.0.0",
  "description": "My Electron application description",
  "main": ".webpack/main",
  "scripts": {
    "start": "electron-forge start",
    "package": "electron-forge package",
    "make": "electron-forge make",
    "publish": "electron-forge publish",
    "lint": "echo \"No linting configured\""
  },
  "keywords": [],
  "author": {
    "name": "Sathishkumar R",
    "email": "rsathishtechit@gmail.com"
  },
  "license": "MIT",
  "config": {
    "forge": {
      "packagerConfig": {},
      "makers": [
        {
          "name": "@electron-forge/maker-squirrel",
          "config": {
            "name": "webex_ui"
          }
        },
        {
          "name": "@electron-forge/maker-zip",
          "platforms": [
            "darwin"
          ]
        },
        {
          "name": "@electron-forge/maker-deb",
          "config": {}
        },
        {
          "name": "@electron-forge/maker-rpm",
          "config": {}
        }
      ],
      "plugins": [
        [
          "@electron-forge/plugin-webpack",
          {
            "mainConfig": "./webpack.main.config.js",
            "renderer": {
              "config": "./webpack.renderer.config.js",
              "entryPoints": [
                {
                  "html": "./src/index.html",
                  "js": "./src/renderer.js",
                  "name": "main_window",
                  "preload": {
                    "js": "./src/preload.js"
                  }
                }
              ]
            }
          }
        ]
      ]
    }
  },
  "devDependencies": {
    "@babel/core": "^7.14.8",
    "@babel/preset-react": "^7.14.5",
    "@electron-forge/cli": "^6.0.0-beta.58",
    "@electron-forge/maker-deb": "^6.0.0-beta.58",
    "@electron-forge/maker-rpm": "^6.0.0-beta.58",
    "@electron-forge/maker-squirrel": "^6.0.0-beta.58",
    "@electron-forge/maker-zip": "^6.0.0-beta.58",
    "@electron-forge/plugin-webpack": "6.0.0-beta.58",
    "@vercel/webpack-asset-relocator-loader": "1.6.0",
    "babel-loader": "^8.2.2",
    "css-loader": "^6.0.0",
    "electron": "13.1.7",
    "node-loader": "^2.0.0",
    "style-loader": "^3.0.0"
  },
  "dependencies": {
    "electron-squirrel-startup": "^1.0.0",
    "react": "^17.0.2",
    "react-dom": "^17.0.2"
  }
}

另外，在webpack.rules.js

下面添加

import * as React from "react";
import * as ReactDOM from "react-dom";

class App extends React.Component {
  componentDidMount() {
    electron.notificationApi.sendNotification("My custom message!");
  }
  render() {
    return <h1>contextBridge</h1>;
  }
}

ReactDOM.render(<App />, document.body);

感谢this page

Answer 6

通过使用 formatting data 我们可以解决这个问题

Format-*

preload.js

new BrowserWindow({
    width: 1200,
    height: 800,
    backgroundColor: "white",
    webPreferences: {
      nodeIntegration: false,
      worldSafeExecuteJavaScript: true,
      contextIsolation: true,
      preload: path.join(__dirname, 'preload.js')
    }
  })

//example to display notification
ipcMain.on('notify', (_, message) => {
   new Notification({title: 'Notification', body: message}).show();
})

然后在您的 reactjs 组件中使用以下代码将触发本机通知消息

const { ipcRenderer, contextBridge } = require('electron');

contextBridge.exposeInMainWorld('electron', {
  notificationApi: {
    sendNotification(message) {
      ipcRenderer.send('notify', message);
    }
  }
})

如何在反应中导入ipcRenderer？

6 个答案:

main.js

App.js