<pre><code>Note: Everything in JavaScript happens inside an Execution Context.
</code></pre>In JavaScript whenever a piece of code is executed then an execution context is created. In simple terms, we can say that execution context is a place where all the code and functions are available.
It has Two Components:
<ol>
<li>Memory Component</li>
<li>Code Component</li>
</ol>
Memory Component:
Memory Component is also known as Variable Environment. When a piece of code is executed JavaScript engine creates a global Execution Context(this is the default execution context). In that context memory component is created along with a code component or we can say a memory heap is created for storing the Variables and Functions. In-memory heap all the variable and function stored as Key-Value Pair e.g. b:10
Code Component:
Code Component is also a thread of execution. Code component is the place where all the code is executed line by line. JavaScript is a synchronous single threaded language and that's why only a single line of code executed at a time in sequence order.
<pre><code>Note: Global execution context is the default execution context of JavaScript.
</code></pre>Note: Everything in JavaScript happens inside an Execution Context**

    Note: Everything in JavaScript happens inside an Execution Context.

In JavaScript whenever a piece of code is executed then an** execution context **is created. In simple terms, we can say that execution context is a place where all the code and functions are available.

**It has Two Components:**
1.     Memory Component
2.    Code Component


**Memory Component:**

Memory Component is also known as Variable Environment. When a piece of code is executed JavaScript engine creates a global Execution Context(this is the default execution context). In that context memory component is created along with a code component or we can say a memory heap is created for storing the Variables and Functions. In-memory heap all the variable and function stored as Key-Value Pair e.g. b:10

**Code Component:**

Code Component is also a thread of execution. Code component is the place where all the code is executed line by line. JavaScript is a synchronous single threaded language and that's why only a single line of code executed at a time in sequence order.

    Note: Global execution context is the default execution context of JavaScript.

Note: Everything in JavaScript happens inside an Execution Context**

What is Execution Context In JavaScript?🤔