Comments and code readability
JavaScript comments and code readability are essential for maintaining clean, understandable, and maintainable code.
1. Types of Comments
Single-line comments: Use //
for short, specific explanations or to comment out a line of code temporarily.
Multi-line comments: Use /* ... */
for longer explanations or to provide more context, like describing functions or modules.
2. Write Meaningful Comments
Explain why something is done, not just what is being done. The code should ideally be self-explanatory for the "what."
Avoid redundant comments. Comments should add value and not state the obvious.
3. Use Descriptive Names
Choose clear and descriptive variable, function, and class names that convey their purpose.
4. Consistent Indentation and Spacing
Maintain consistent indentation (usually 2 or 4 spaces).
Group related blocks of code with line breaks to improve readability.
5. Break Down Long Functions
Split long functions into smaller, more manageable functions. This helps with readability and reusability.
6. Use Consistent Naming Conventions
Follow camelCase for variables and functions (
getUserData
), PascalCase for classes (UserProfile
), and uppercase with underscores for constants (MAX_RETRIES
).
7. Add Documentation Comments
For larger projects, use JSDoc-style comments to provide details about functions, parameters, return types, etc.
By following these practices, you can ensure your JavaScript code is clean, readable, and easy for others (and your future self) to understand and maintain.