Merge pull request #7449 from amtj/repl-docs

add REPL documentation

docs/README.md

@@ -37,6 +37,7 @@ an issue:
 * [Quick Start](tutorial/quick-start.md)
 * [Desktop Environment Integration](tutorial/desktop-environment-integration.md)
 * [Online/Offline Event Detection](tutorial/online-offline-events.md)
+* [REPL](tutorial/repl.md)
 
 ## API References
 

docs/tutorial/repl.md

@@ -0,0 +1,26 @@
+# REPL
+
+Read-Eval-Print-Loop (REPL) is a simple, interactive computer programming
+environment that takes single user inputs (i.e. single expressions), evaluates
+them, and returns the result to the user.
+
+The `repl` module provides a REPL implementation that can be accessed using:
+
+* Assuming you have `electron` or `electron-prebuilt` installed as a local
+  project dependency:
+
+  ```sh
+  ./node_modules/.bin/electron --interactive
+  ```
+* Assuming you have `electron` or `electron-prebuilt` installed globally:
+
+  ```sh
+  electron --interactive
+  ```
+
+This only creates a REPL for the main process. You can use the Console
+tab of the Dev Tools to get a REPL for the renderer processes.
+
+**Note:** `electron --interactive` is not available on Windows.
+
+More information can be found in the [Node.js REPL docs](https://nodejs.org/dist/latest/docs/api/repl.html).