Essential JavaScript Habits for Developers

1. Write Clean and Readable Code

• Use consistent naming conventions and indentation.
• Follow a popular style guide like Airbnb's.
• Keep functions and files short and focused.

2. Understand the JavaScript Execution Model

• Learn about the event loop, call stack, and microtasks.
• Know how asynchronous code is executed.
• Master setTimeout, Promises, and async/await.

3. Use const and let Instead of var

• const for values that don’t change.
• let for variables that may change.
• Avoid var to prevent hoisting and scope issues.

4. Keep Code DRY (Don’t Repeat Yourself)

• Abstract repeated logic into functions or modules.
• Use array methods like .map(), .filter(), .reduce().
• Modularize your code for reusability.

5. Handle Errors Gracefully

• Use try...catch with async/await.
• Validate user input and external data.
• Prevent application crashes with fallback logic.

6. Master the DOM and Event Handling

• Understand how to manipulate the DOM efficiently.
• Use addEventListener() properly.
• Avoid memory leaks with event clean-up.

7. Use Modern ES6+ Features

• Arrow functions, destructuring, template literals, etc.
• Keep up with new features in newer ECMAScript versions.
• Write concise and expressive code.

8. Write Unit Tests

• Use frameworks like Jest, Mocha, or Vitest.
• Test core logic and edge cases.
• Make your code more robust and refactor-friendly.

9. Organize Your Code for Scalability

• Use modules and folder structures.
• Separate concerns: logic, UI, API calls.
• Follow patterns like MVC or component-based design.

10. Practice Regularly and Build Projects

• Apply what you learn by building real apps.
• Tackle coding challenges (e.g., Codewars, LeetCode).
• Contribute to open source or join dev communities.

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