docs: error handling & debugging

Author: devmahmud

README.md

@@ -1,10 +1,10 @@
-**Course Title: Advanced JavaScript Programming**
-**Course Duration: XX weeks**
+# Course Title: Advanced JavaScript Programming
 
 **Course Description:**
 This advanced JavaScript course is designed for experienced developers looking to deepen their understanding of JavaScript and expand their skills in web development and software engineering. The course covers advanced topics and best practices, enabling students to build complex applications and optimize existing ones.
 
 **Prerequisites:**
+
 - Proficiency in [basic JavaScript](#module-1-advanced-javascript-concepts)
 - Familiarity with [HTML](#module-3-advanced-dom-manipulation) and [CSS](#module-3-advanced-dom-manipulation)
 - Experience with [web development](#module-3-advanced-dom-manipulation)
@@ -22,21 +22,23 @@ This advanced JavaScript course is designed for experienced developers looking t
 ### [Module 2: Object-Oriented Programming (OOP) in JavaScript](./module-2-object-oriented-programming-oop-in-javascript.md)
 
 - 2.1. [Constructors and Prototypes](./module-2.1-constructors-and-prototypes.md)
-- 2.2. [Classes and Inheritance](#classes-and-inheritance)
-- 2.3. [Mixins and Composition](#mixins-and-composition)
-- 2.4. [Private and Static Members](#private-and-static-members)
+- 2.2. [Classes and Inheritance](./module-2.2-classes-and-inheritance.md)
+- 2.3. [Mixins and Composition](./module-2.3-mixins-and-composition.md)
+- 2.4. [Private and Static Members](./module-2.4-private-and-static-members.md)
 
 ### [Module 3: Advanced DOM Manipulation](./module-3-advanced-dom-manipulation.md)
 
 - 3.1. [Traversing and Selecting DOM Elements](./module-3.1-traversing-and-selecting-dom-elements.md)
-- 3.2. [Creating and Modifying DOM Elements](#creating-and-modifying-dom-elements)
-- 3.3. [Event Handling and Delegation](#event-handling-and-delegation)
-- 3.4. [Web APIs and AJAX](#web-apis-and-ajax)
-
-### [Module 4: Error Handling and Debugging](#module-4-error-handling-and-debugging)
-4.1. [Error Handling Best Practices](#error-handling-best-practices)
-4.2. [Debugging Techniques and Tools](#debugging-techniques-and-tools)
-4.3. [Error Logging and Reporting](#error-logging-and-reporting)
+- 3.2. [Creating and Modifying DOM Elements](./module-3.2-creating-and-modifying-dom-elements.md)
+- 3.3. [Event Handling and Delegation](./module-3.3-event-handling-and-delegation.md)
+- 3.4. [Web APIs and AJAX](./module-3.4-web-apis-and-ajax.md)
+
+### [Module 4: Error Handling and Debugging](./module-4-error-handling-and-debugging.md)
+
+- 4.1. [Error Handling Best Practices](./module-4.1-types-of-errors.md)
+- 4.2. [Debugging Techniques and Tools](./module-4.2-debugging-tools.md)
+- 4.3. [Error Logging and Reporting](./module-4.3-error-handling-techniques.md)
+- 4.4. [Best Practices](./module-4.4-best-practices.md)
 
 ### [Module 5: Advanced ES6 and Beyond](#module-5-advanced-es6-and-beyond)
 5.1. [Destructuring and Spreading](#destructuring-and-spreading)

module-4-error-handling-and-debugging.md

@@ -0,0 +1,47 @@
+### Module 4: Error Handling and Debugging
+
+**Description:**
+
+Module 4 focuses on the important topic of error handling and debugging in web development. Understanding how to handle errors gracefully and efficiently debug your code is essential for creating robust and reliable web applications.
+
+**Topics Covered:**
+
+### 4.1. Types of Errors
+
+- **Syntax Errors:** Learn to identify and fix syntax errors, which can prevent code execution.
+
+- **Runtime Errors:** Explore common runtime errors, such as null reference errors and type errors.
+
+- **Logical Errors:** Understand how logical errors can lead to unexpected behavior and learn strategies for detecting and fixing them.
+
+### 4.2. Debugging Tools
+
+- **Console:** Discover how to use the browser's developer console for logging and debugging.
+
+- **Breakpoints:** Learn to set breakpoints in your code to pause execution and inspect variables.
+
+- **Debugger Statements:** Use `console.log` and `debugger` statements for step-by-step code inspection.
+
+### 4.3. Error Handling Techniques
+
+- **Try...Catch:** Implement error handling using `try...catch` blocks to gracefully handle exceptions.
+
+- **Throwing Errors:** Learn how to throw custom errors to provide more informative error messages.
+
+- **Error Objects:** Explore built-in error objects like `Error`, `TypeError`, and `ReferenceError`.
+
+### 4.4. Best Practices
+
+- **Error Logging:** Establish error logging strategies to capture and report errors in production.
+
+- **Code Testing:** Incorporate unit testing and automated testing to catch errors early.
+
+- **Code Reviews:** Understand the importance of code reviews in identifying potential issues.
+
+**Practical Application:**
+
+Error handling and debugging are critical for maintaining the stability and reliability of web applications. Being able to identify and resolve errors efficiently ensures a smooth user experience.
+
+**Key Takeaways:**
+
+This module equips you with the knowledge and skills to identify, handle, and debug errors in your web applications. Mastering these techniques will result in more robust and reliable code, leading to improved user satisfaction and trust in your applications.

module-4.1-types-of-errors.md

@@ -0,0 +1,67 @@
+#### 4.1. Types of Errors
+
+In web development, errors can occur at different stages of the development and execution of your code. Understanding the types of errors is crucial for effective error handling and debugging.
+
+##### Syntax Errors
+
+Syntax errors, often referred to as "parsing errors," occur when your code violates the syntax rules of the programming language. These errors prevent your code from being executed.
+
+**Example:**
+
+```javascript
+// Syntax error due to missing closing parenthesis
+function add(a, b {
+  return a + b;
+}
+```
+
+In this example, the missing closing parenthesis in the function parameter list results in a syntax error.
+
+##### Runtime Errors
+
+Runtime errors occur during the execution of your code. They can be caused by various issues, such as referencing an undefined variable or attempting an operation that's not supported.
+
+**Example:**
+
+```javascript
+// Runtime error due to dividing by zero
+function divide(a, b) {
+  if (b === 0) {
+    throw new Error('Division by zero is not allowed.');
+  }
+  return a / b;
+}
+
+console.log(divide(10, 0)); // Throws a runtime error
+```
+
+In this example, we throw a runtime error when attempting to divide by zero to prevent an undesirable outcome.
+
+##### Logical Errors
+
+Logical errors are more subtle and challenging to detect. They occur when your code doesn't produce the expected or desired results, even though it runs without syntax or runtime errors.
+
+**Example:**
+
+```javascript
+// Logical error in calculating the sum of an array
+function calculateSum(arr) {
+  let sum = 0;
+  for (let i = 0; i < arr.length; i++) {
+    sum += arr[i];
+  }
+  return sum;
+}
+
+const numbers = [1, 2, 3, 4, 5];
+console.log(calculateSum(numbers)); // Incorrect result (logical error)
+```
+
+In this example, a logical error in the `calculateSum` function leads to an incorrect result, as it doesn't properly calculate the sum of the array elements.
+
+#### Benefits
+
+- Understanding the types of errors helps you identify and address issues in your code effectively.
+- Properly categorizing and diagnosing errors is crucial for implementing appropriate error handling strategies.
+
+Recognizing and differentiating between syntax errors, runtime errors, and logical errors is essential for efficient debugging and error handling in web development.