Improving Front‑End Code Quality through Code Review and Refactoring Techniques

Preface

Many developers notice a large gap in ability between those with one year of experience and those with three years, but the difference is not innate; it stems from the amount of time spent learning and thinking.

In particular, code Review and studying excellent open‑source projects can accelerate coding skill growth dramatically.

Let’s examine the benefits of code Review:

When multiple people review your code, new ideas emerge and you discover aspects you hadn’t considered.

Reviewers with higher standards expose you to better coding habits, design thinking, and patterns.

Reviewers with lower standards let you see common mistakes so you can avoid them in the future.

Peers at a similar level let you compare implementation approaches and gain perspective.

Sharing Some of Our Reviewed Code

The following snippets are pseudocode for illustration only; each company has its own conventions, so treat them as reference material.

1. Use a ternary expression to simplify a single if‑else assignment

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For immutable and lengthy objects or arrays, place them in a separate TypeScript file and import them, making the code cleaner.

2. Replace repetitive if‑else chains with a map

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Using a map implements the Strategy Pattern, eliminating large if‑else blocks that make the code hard to read.

3. Replace forEach+splice with findIndex+splice

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Instead of always iterating with forEach, using findIndex directly locates the element to remove, reducing complexity.

4. Move condition checks earlier

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Placing the guard condition first prevents execution of the inner block when dataNum is missing, improving performance.

5. Use destructuring to reduce repetitive object assignments

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The params object can be spread ( ...) directly into the form, avoiding repetitive assignments.

6. Leverage TypeScript utility types (Pick, Partial, Omit) for large repetitive types

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Consolidating large types with utility types reduces duplication and improves maintainability.

7. Replace magic numbers with constants or enums

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Changing the magic number 120 to a named constant with a comment makes the code much clearer.

8. Avoid reinventing the wheel

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Instead of writing custom logic to close other elements’ pop‑ups, use existing libraries such as vueuse in Vue 3, which improve development efficiency and provide reliable implementations.

Conclusion

If you are a junior front‑end developer working alone, it can be hard to develop good coding habits without senior guidance. In such cases, study open‑source projects like Element‑Plus, Vben, or vue3‑admin‑vite, and actively participate in any code Review activities your company offers, as they provide invaluable learning opportunities.