💁 Provide the environment of each global variable

Each environment has its own object model and provides a different syntax to access the global object. In the web browser, for example, the global object is accessible via window, self, or frames. In Node.js, however, these properties don’t exist, and you must use global instead. In Web Workers, only self is available.

Author: alamenai

README.md

@@ -324,7 +324,12 @@ console.log(greetign);
 
 #### Answer: A
 
-It logs the object, because we just created an empty object on the global object! When we mistyped `greeting` as `greetign`, the JS interpreter actually saw this as `global.greetign = {}` (or `window.greetign = {}` in a browser).
+It logs the object, because we just created an empty object on the global object! When we mistyped `greeting` as `greetign`, the JS interpreter actually saw this as:
+
+1. `global.greetign = {}` in Node.js
+2. `window.greetign = {}`, `frames.geetign = {}` and `self.greetign` in browsers.
+3. `self.greetign` in web workers.
+4. `globalThis.greetign` in all environments.
 
 In order to avoid this, we can use `"use strict"`. This makes sure that you have declared a variable before setting it equal to anything.