Manually copying arrays? Handling unknown function arguments? Forgetting default values?

If you're still manually copying arrays, struggling to handle unknown arguments in functions, or forgetting to set default values—it's time to upgrade your JavaScript game!

📌 Spread Operator (`...`) – Need to copy or merge arrays? The spread syntax expands elements so you can manipulate them with ease.

📌 Rest Parameters (`...`) – Allows functions to accept multiple arguments as an array, simplifying handling of unknown input sizes.

📌 Default Parameters – Ensures function parameters always have a value, preventing `undefined` issues and unnecessary checks.

These features make your code more readable, concise, and maintainable. If you’re not using them yet, now’s the perfect time to start!

💡 Check out our full guide with examples—link in bio!

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