Mehak Dhingra

ARPANET: Moving a file was a project. Now: The world's research is in my pocket.The acceleration is both terrifying and amazing. No idea what's next.🤯 #WebDev #internet

The fix is simple: 1️⃣ Backend needed: Access-Control-Allow-Origin: http://localhost:3000 2️⃣ My frontend fetch just needed: { mode: 'cors' } That moment when you realize CORS isn't broken - it's working exactly as designed to keep us safe! #WebDev #TheStruggleIsReal

I finally got CORS! My frontend at localhost:3000 kept failing to fetch from localhost:4000 - turns out different ports = different origins!🧵

Multer package in node is quite beneficial for parsing the form data in the backend.Was not able to parse the form data then got to know about this package.👨‍💻 #Node #Javascript #NPM

Have you guys ever seen #!/bin/bash at the top of a script? That's a shebang! It’s like telling your computer: "Hey, run this file with Bash/Python/Node/etc." So instead of typing python script.py, you can just run ./script—neat, right? 😎 #TechTips #DevLife"

I used to feel like callback makes things difficult!But now I feel like without them asynchronous code would not have been possible in javascript and now i feel their importance🧵 #javascript #webapi

This is all that you need to know if you want to know about how does javascript run? #javascript #eventloop

Server-side programs can "listen" for requests because they talk to the OS, and the OS knows how to handle TCP. The OS listens on a port, and your code (like app.listen(3000)) just asks the OS to wake it up when someone connects. It’s all built on layers! 🔥 #backenddev #Node

Don’t let the jargon scare you.🧠 It’s all just structured communication .No protocol = no conversation.Once you understand that, the internet becomes way less mysterious — and way more buildable.

So every time you visit a website: You (client) send a request A server receives it Both speak the same protocol (HTTP over TCP) They understand each other — and a page appears.

Scared of terms like TCP, HTTP, or UDP? Don’t be. They’re not dangerous — they’re just rules that define how two devices talk. Let me break it down in plain English. 👇🧵

Just clicked how computers store everything as 0s/1s! 🤯 🔷The SAME binary (like 01000001) can be: The letter 'A' 📝 The number 65 🔢 A pixel color 🖼️ Sound 🔊 Context is EVERYTHING! How we read it changes its meaning. Knowing this feels like a superpower! #TechBasics #Binary

Today I published my own npm cli package so it is a basically a simple word-counter project. To use: 🔷npm i meword-counter-cli To run: 🔶npx meword-counter-cli ./wordtest.txt or 🔶In package.json "scripts": { "count": "word-counter" } and then run npm run count wordtest.txt

Just learned about SSH servers and it’s wild! I tried it with my friend’s laptop-opened her terminal from my computer like magic. Turns out, real servers don’t even need passwords. Instead: Server holds a public key (like a lock) Client holds the private key (the actual key).

1️⃣ Got a public IP for my router (just called my ISP) 2️⃣ Set up port forwarding (in the router's gateway) 3️⃣ Bought a domain (@GoDaddy) and linked it to my IP And it freaking worked! #NoobToServer #TechMag

Tried something I thought was impossible! A while back, I used to wonder—how do people turn their PCs into servers? It seemed like some next-level hacker stuff. But guess what? I tried it! Here's the simple breakdown:🧵