This page defines some terminology that is commonly used in Electron development.
ASAR stands for Atom Shell Archive Format. An asar archive is a simple
tar-like format that concatenates files into a single file. Electron can read
arbitrary files from it without unpacking the whole file.
The ASAR format was created primarily to improve performance on Windows... TODO
Brightray is a static library that makes libchromiumcontent easier to use in applications. It was created specifically for Electron, but can be used to enable Chromium's renderer in native apps that are not based on Electron.
Brightray is a low-level dependency of Electron that does not concern the majority of Electron users.
An Apple Disk Image is a packaging format used by macOS. DMG files are
commonly used for distributing application "installers". electron-builder
dmg as a build target.
A single, shared library that includes the Chromium Content module and all its dependencies (e.g., Blink, V8, etc.).
The main process, commonly a file named
main.js, is the entry point to every
Electron app. It controls the life of the app, from open to close. It also
manages native elements such as the Menu, Menu Bar, Dock, Tray, etc. The
main process is responsible for creating each new renderer process in the app.
The full Node API is built in.
Every app's main process file is specified in the
main property in
package.json. This is how
electron . knows what file to execute at startup.
Acronym for Apple's Mac App Store. For details on submitting your app to the MAS, see the Mac App Store Submission Guide.
Native Node modules are supported by Electron, but since Electron is very likely to use a different V8 version from the Node binary installed in your system, you have to manually specify the location of Electron’s headers when building native modules.
See also Using Native Node Modules.
Nullsoft Scriptable Install System is a script-driven Installer authoring tool for Microsoft Windows. It is released under a combination of free software licenses, and is a widely-used alternative to commercial proprietary products like InstallShield. electron-builder supports NSIS as a build target.
In Node.js and Electron, each running process has a
process object. This
object is a global that provides information about, and control over, the
current process. As a global, it is always available to applications without
The renderer process is a browser window in your app. Unlike the main process, there can be multiple of these and each is run in a separate process. They can also be hidden.
In normal browsers, web pages usually run in a sandboxed environment and are not allowed access to native resources. Electron users, however, have the power to use Node.js APIs in web pages allowing lower level operating system interactions.
Squirrel is an open-source framework that enables Electron apps to update automatically as new versions are released. See the autoUpdater API for info about getting started with Squirrel.
This term originated in the Unix community, where "userland" or "userspace" referred to programs that run outside of the operating system kernel. More recently, the term has been popularized in the Node and npm community to distinguish between the features available in "Node core" versus packages published to the npm registry by the much larger "user" community.
Like Node, Electron is focused on having a small set of APIs that provide all the necessary primitives for developing multi-platform desktop applications. This design philosophy allows Electron to remain a flexible tool without being overly prescriptive about how it should be used. Userland enables users to create and share tools that provide additional functionality on top of what is available in "core".
webview tags are used to embed 'guest' content (such as external web pages) in
your Electron app. They are similar to
iframes, but differ in that each
webview runs in a separate process. It doesn't have the same
permissions as your web page and all interactions between your app and
embedded content will be asynchronous. This keeps your app safe from the