Clean Code: Principles for Writing Clean and Readable Code

Writing code is easy, but writing good code is an art. Robert Martin wrote in detail in "Clean Code" book. Clean Code JavaScript — practical guide.

1. Meaningful names

Bad: const d = new Date(). Good: const currentDate = new Date(). Variable and function names should express meaning.

2. Small functions

Each function does one task. 100 lines — bad. 10–20 lines — good. One task — one function.

3. Comments

Code should be self-explanatory. Comments only where needed. Write "Why", not "What".

4. DRY and KISS

DRY — Don't Repeat Yourself. Repeated code — extract to function. KISS — Keep It Simple. Simplicity is best.

5. Formatting

Consistent indentation. Separate with blank lines. Prettier, ESLint — automatic.

Conclusion

Clean code — saves your and your team's time.

Source: Clean Code JavaScript