What are the best practices for using forEach in JavaScript?

What are the best practices for using forEach in JavaScript?

When using forEach in JavaScript, it's best to avoid modifying the array you're iterating over. Also, consider using it for side effects rather than returning values.

Can you explain why modifying the array during iteration is a bad practice?

Modifying the array during iteration can lead to unexpected behavior, such as skipping elements or causing infinite loops, which can make your code harder to debug.

Are there any performance concerns with forEach compared to other loops?

Yes, forEach can be slower than traditional for loops or for...of loops, especially with large arrays, because it involves function calls for each iteration.

What alternatives to forEach should I consider?

You might consider using for loops, for...of loops, or higher-order functions like map, filter, or reduce, depending on your use case.