Here are some essential guidelines for writing clean, efficient JavaScript code:
1. Nomenclature of Variables and Functions Use descriptive names for variables and functions to make the code easier to understand. Follow naming conventions such as camelCase for variables and functions (e.g. myVariable, myFunction).
2. Use of Semicolons Always end statements with a semicolon to avoid unexpected errors.
3. Declaration of Variables Always declare variables with var, let or const to avoid global scope pollution. Prefer the use of const whenever possible, to ensure that variables are not reassigned.
4. Array Manipulation Use native array methods (like map, filter, reduce) instead of for loops to make your code more readable and concise. Avoid changing original arrays directly. Instead, create copies before making changes.
5. String Manipulation Use template literals (template strings) to create more complex strings, instead of traditional concatenation. Avoid using complicated and unnecessary constructs when dealing with simple strings.
6. Use of Functions Keep functions short and focused on a single task to improve readability and reusability. Avoid excessive function nesting (callback hell). Use promises or async/await to handle asynchronous operations.
7. Comments Write meaningful comments to explain complex parts of code or design decisions. Avoid redundant comments that don't add useful information.
8. Error Handling Always handle errors appropriately to avoid unexpected code breaks. Use try-catch to catch exceptions and provide descriptive error messages.
9. Modularity and Organization Divide code into modules to promote reusability and maintainability. Follow the clear and logical folder structure when organizing source code files.
10. Tests Write automated tests to verify code functionality and prevent regressions. Use testing frameworks like Jest, Mocha or Jasmine to ensure code quality. Conclusion Following best practices when writing JavaScript code not only makes collaborative work easier, but also ensures more robust and maintainable code. These guidelines help promote a consistent coding style and improve the overall quality of the software.
JavaScript code is considered “ready” when it meets all functional and non-functional requirements, passes automated and acceptance testing, is peer-reviewed, meets established good coding practices, and conforms to quality standards defined by the development team. Additionally, it must be well documented, have adequate error handling, and have been tested in different environments and target browsers to ensure compatibility and stability.
This definition incorporates essential aspects of software development, including functionality, quality, performance, and compliance with guidelines established by the development team. It is crucial to ensure that JavaScript code is not only functional, but also maintainable, readable, and stable for production deployments.
Comments in JavaScript code are critical to improving understanding, maintenance, and collaboration in software development. Here are some guidelines for how comments should be used:
One-line comments: For short, concise comments, use for one-line comments. Multi-line comments: For longer comments, use /* … */ for multi-line comments. Explanatory comments: Always explain the intent behind complex pieces of code. Documentation comments: Use JSDoc or a similar documentation tool to document functions, parameters, and returns. TODO and 
comments: Use to highlight areas that require future attention or corrections. When writing reviews, it is important to maintain balance. Too many comments can pollute the code, while too little comments can make the code difficult to understand. The goal is to provide valuable and relevant information to other developers who may review or maintain the code in the future.