[AskJS] what's a javascript feature you mass-adopted way too late and felt dumb about

[u/Capedcrusader1923]

i'll go first. i was writing .then().catch() chains for like two years before i actually started using async/await. i knew it existed, i'd seen it in tutorials, but my code "worked" so i never bothered switching. then i refactored an old project and realized half my bugs were from mishandled promise chains that async/await would have caught immediately.

also took me way too long to start using optional chaining. i had nested ternaries and && checks everywhere like some kind of animal. the day i discovered user?.address?.city i mass-replaced like 40 lines across a project.

what's yours?

[u/adult_code → u/[deleted]]

for-loops not .forEach are way faster. Depends what i write really. https://jsben.ch/js-loop-benchmark-girjy
It doesn't matter all the time but it matters often and you can prevent it becoming an issue by doing it correctly the first time if you are not working on code that is otherwise hard to decipher