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electron-typescript-ipc

v3.0.0

Published

Library for type-safe use of contextBridge in Electron

Downloads

612

Readme

electron-typescript-ipc

Library for type-safe use of contextBridge in Electron.

Motivation

When we implement ipc using contextBridge in TypeScript, we can't know if the method exists (unsafe). This library is aimed at making it type-safe to use.

Install

Install with npm (or you can use your favorite tool).

npm i electron-typescript-ipc

Example

We have a template repository for using this module.
Please see here: https://github.com/JichouP/electron-typescript-ipc-example.

preload/preload.ts

import {
  contextBridge,
  createIpcRenderer,
  GetApiType,
} from 'electron-typescript-ipc';
import { Api } from 'path/to/api.ts';

const ipcRenderer = createIpcRenderer<Api>();

export type Api = GetApiType<
  {
    getDataFromStore: (str: string) => Promise<string>;
  },
  {
    showAlert: (text: string, num: number) => Promise<void>;
  }
>;

const api: Api = {
  invoke: {
    getDataFromStore: async (key: string) => {
      return await ipcRenderer.invoke('getDataFromStore', key);
    },
  },
  on: {
    showAlert: listener => {
      ipcRenderer.on('showAlert', listener);
    },
  },
};

contextBridge.exposeInMainWorld('myAPI', api);

declare global {
  interface Window {
    myAPI: Api;
  }
}

lib/main.ts

const createWindow = (): void => {
  const mainWindow = ...

  mainWindow.on('ready-to-show', () => {
    ipcMain.removeHandler<Api>('getDataFromStore'); // This is essential in case you are called multiple times
    ipcMain.handle<Api>('getDataFromStore', async (_event, key) => {
      return await store.get(key);
    });
    setInterval(ipcMain.send<Api>(mainWindow, 'showAlert', 'Hi'), 10000)
  })
}

renderer/app.ts

window.myApi.invoke.getDataFromStore('someKey').then(console.log);
window.myApi.on.showAlert((_event, text) => {
  alert(text);
});