What are parameters vs arguments in JavaScript functions?

Parameters: placeholders like (x,y). Arguments: real values like sum(4,5). Mixup

Why use arrow functions over regular ones?

Shorter syntax, lexical 'this'. Skip for object methods needing dynamic binding.

Yes. Call before defining. Expressions

sum(4,5) returns 9. Harmless. Until scope leaks turn it into a nightmare. JavaScript functions aren't toys – they're the fragile core of messy apps.

theAIcatchup Apr 09, 2026 3 min read

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Originally reported by dev.to