electron-sender
v1.0.5
Published
A simple ElectronJS tool to send and receive messages between processes.
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parking-masterReadme
electron-sender
A simple tool that lets you interact between processes in an ElectronJS app.
Quickstart
To install:
> npm i electron-senderor
> npm install electron-senderFor developement environments, please use the --save-dev flag when installing.
To use:
main.js
const { app, BrowserWindow } = require("electron");
const Sender = require("electron-sender");
app.on("ready", () => {
const mainWindow = new BrowserWindow({ ... });
mainWindow.webContents.loadFile(__dirname + "/index.html");
Sender.append(mainWindow);
Sender.receive(mainWindow, "test_function", (param1, param2) => {
console.log("Received param1: " + param1 + "\nReceived param2: " + param2);
});
});index.html
<!DOCTYPE html>
<html>
<body>
<script>
Sender.send("test_function", ["string1", "string2"]);
</script>
</body>
</html>And the output:
> Launch app
> Window opens
> Console message
> Received param1: String "string1"
> Received param2: String "string2"Documentation
Definitions
Sender.receive- function receive(process: Electron.BrowserWindow)
Sender.send(main process) - function send(name: String, params: Array)
Sender.send(renderer process) - function send(name: String, params: Array)
Sender.append- function append(process: Electron.BrowserWindow)
What they do
Sender.receive()- defines a function to run
Sender.send()- runs a defined function (used in renderer and main processes)
Sender.append()- appends the tools to the selected process
How it works
Messages between processes are very simple.
Messages from main.js to index.html occur when a default function built-in called WebContent.executeJavascript executes a function defined in the renderer process (index.html).
Example:
# main.js
mainWindow.webContents.executeJavascript(`Sender.functions["test_function"]("string1", "string2")`);
// Is the same as
Sender.send("test_function", ["string1", "string2"]);# index.html
<script>
Sender.functions["test_function"] = (param1, param2) => {
console.log(param1, param2);
};
// Is the same as
Sender.receive("test_function", (param1, param2) => {
console.log(param1, param2);
});
</script>This process works the same way, send to receive in the main process, send to receive in the renderer process, Vice-Versa.
What certain functions do
Appending a process using Sender.append
This function prepares a certain ElectronJS process (window) for this package.
Basically it just gives the window the tools you need to interact between processes.
Sending messages or functions using Sender.send
This function works with both main and renderer processes, as well as Sender.receive.
This will listen for the specified message and run the defined function by Sender.receive.
Receiving messages using Sender.receive
Like mentioned, both send and receive functions are necessary for interaction.
This function is very important because you need a function to run using Sender.send, so without this, the package is useless.
Errors
Uncaught Error: Process "" is undefined
This error occurs when using Sender.send could not find the function name defined by Sender.receive
License
MIT