Anusha Panwar

Sharing JavaScript & frontend learnings, confusions, and fixes as I build my way forward.

[Anusha Panwar @anusha_panwar]

JavaScript "slice()" method explained!
🧵A thread on mastering slice() 👇

#javascript #webdev #frontend #coding

[Anusha Panwar @anusha_panwar]

@CodepathYash The video gives a good overview. Would be better if you deploy it and share the live link for people to try!

[Anusha Panwar @anusha_panwar]

@shubhamschahar So true, a tiny operator choice can change the meaning of the data. || can silently overwrite valid values like 0, false, or "", while ?? preserves them.

[Anusha Panwar @anusha_panwar]

@aslambeg84 The biggest advantage is catching mistakes before the code runs, which makes larger codebases safer to maintain and refactor.

[Anusha Panwar @anusha_panwar]

@codewithnehaa The video shows the project well! Since you’re looking for feedback, a live demo would make it easier to try the drag-and-drop interaction. Are you planning to deploy it and share the link?

[Anusha Panwar @anusha_panwar]

@Ayomiposi_ay Agreed🙌What made it most obvious during the interview that someone genuinely understood the concepts rather than just recognising AI-generated patterns?

[Anusha Panwar @anusha_panwar]

@iamdoyinadeyemo Got it. I think many developers pick Next.js because routing, rendering, and server features come built in. React with Vite still makes sense when those extras aren’t needed.

[Anusha Panwar @anusha_panwar]

@GotwalRitika11 Tried it, the copy confirmation is a nice UX touch. Neat way to practice DOM updates and the Clipboard API in one small project, keep going!

[Anusha Panwar @anusha_panwar]

@anurag_629 Easy mistake to make because .sort() looks like it should handle numbers naturally. The production example makes the risk very real!

[Anusha Panwar @anusha_panwar]

@malahhhc Yes, they’re compared as strings. The main issue is the boolean return value, I’ve broken it down in the next post of this thread.

[Anusha Panwar @anusha_panwar]

This JavaScript comparator looks reasonable, but it’s broken.
Why doesn't it sort correctly?🤔

[Anusha Panwar @anusha_panwar]

@malahhhc Glad it helped! All the best with your learning journey🙌

[Anusha Panwar @anusha_panwar]

@shoriful_dev I think supporting both gives developers flexibility and often avoids escaping, for example, "I'm learning JS" or 'He said "hello"'.

[Anusha Panwar @anusha_panwar]

a > b compares the values as strings, but returns only a boolean:
true → 1
false → 0

A sort() comparator must return:
negative → a before b
positive → a after b
0 → same order

Since this never returns a negative value, it doesn't define a valid ordering.

[Anusha Panwar @anusha_panwar]

@ania_kubow This is much cleaner for static text! Would you still choose JavaScript when the text is dynamic or needs pause, restart, and delete effects?

[Anusha Panwar @anusha_panwar]

@ravikm121q It logs true, but this is the actual coercion order:
[] == false
→ [] == 0
→ "" == 0
→ 0 == 0
→ true

[Anusha Panwar @anusha_panwar]

@NanouuSymeon Useful overview! In many frontend projects, components, pages, styles, and utils would live inside src, while node_modules is generated and gitignored. Was the root-level placement intentional here?

[Anusha Panwar @anusha_panwar]

@TheOmarSelf Definitely😄 Actually understanding the concepts will never go out of style.

[Anusha Panwar @anusha_panwar]

@senodev_ Keep going! The toFixed() vs toPrecision() distinction is especially useful, decimal places versus significant digits.