Add globalThis question

Author: sudheerj

README.md

@@ -8849,7 +8849,7 @@ The execution context is created when a function is called. The function's code
 
 **[⬆ Back to Top](#table-of-contents)**
 
-1.   ### How to find the number of parameters expected by a function?
+468.   ### How to find the number of parameters expected by a function?
   The function's object has a **length** property which tells you how many formal parameters expected by a function. This is a static value defined by the function, not the number of arguments the function is called with(__arguments.length__). The basic usage of length propery is,
 
   ```javascript
@@ -8898,6 +8898,26 @@ The execution context is created when a function is called. The function's code
 
 **[⬆ Back to Top](#table-of-contents)**
 
+469. ### What is globalThis, and what is the importance of it?
+     Nowadays JavaScript language is used in a wide variety of environments and each environment has its own object model. Due to this fact, there are different ways(syntax) to access the global object.
+
+     1. In web browser, the global object is accessible via `window`, `self`, or `frames`.
+     2. In Node environment, you have to use `global`.
+     3. In Web workers, the global object is available through `self`.
+
+    The `globalThis` property provides a standard way of accessing the global object without writing various code snippet to support multiple environments. For example, the global object retuned from multiple environments as shown below,
+    
+    ```javascript
+    //1. browser environment
+    console.log(globalThis);    // => Window {...}
+
+    //2. node.js environment
+    console.log(globalThis);    // => Object [global] {...}
+
+    //3. web worker environment
+    console.log(globalThis);    // => DedicatedWorkerGlobalScope {...}
+    ```
+**[⬆ Back to Top](#table-of-contents)**
 
 <!-- QUESTIONS_END -->