What is TypeScript and should I learn it after JavaScript?
Lots of job posts mention TypeScript. Is it a separate language I need to learn properly, or just a small addition to JavaScript?
Developers Hub
5 members · 45 questions
Code, careers and everything developer life.
Is it safe to put my personal or work data into AI chatbots?
I want to paste work documents in for summarising but I'm not sure what happens to that data. What should I be careful about?
How long does it realistically take to become job-ready as a frontend developer?
Courses say 3 months, Reddit says 2 years. I can study about 2–3 hours a day around work. What's an honest timeline?
How important is math for programming and web development?
I'm not good at maths and it's the main thing stopping me from starting. How much do I genuinely need for normal development work?
How do I switch careers into tech from a completely different field?
I'm in my thirties working in a non-technical role and want to move into tech. Is it realistic and where do I start?
What is caching and when should I use it?
Caching gets recommended for every performance problem. What is it actually doing and what are the risks of using it wrongly?
How do I make my website load faster? A practical checklist?
My site scores 40 on PageSpeed and I don't know where to start. What gives the biggest wins for the least effort?
What is the difference between HTML, CSS and JavaScript?
I keep hearing these three together and I'm not sure where one ends and the next begins. Can someone explain the split in plain terms with an example?
Horizontal vs vertical scaling — what's the difference and which comes first?
My app is slowing down as users grow. Do I get a bigger server or more servers? How do real companies decide?
What is the difference between == and === in JavaScript?
I've been told to always use === but I don't understand what actually differs and when == would be wrong.
What is the difference between machine learning and statistics?
A statistician told me machine learning is just applied statistics with better marketing. Is that fair?
What is an API and how does it work, explained simply?
I've read a dozen definitions and they all say 'application programming interface' as if that clears anything up. What is an API actually doing, in normal language?
What is Docker and do I need it as a beginner?
Docker is on every job listing but every explanation involves containers, images and daemons and I lose the thread. What problem is it solving?
How do I choose a good project idea when I'm learning to code?
I'm told to build projects but every idea I have is either a to-do list clone or something wildly beyond my ability. How do I find the right-sized idea?
React vs Next.js — which should a beginner learn first?
I keep seeing job posts asking for Next.js but every course teaches plain React. Do I need to learn React separately first, or can I jump straight into Next.js?
What are environment variables and why shouldn't I commit my API keys?
I pushed a project to GitHub with my API key in the code and got a warning email. What should I have done instead?
Should I learn Python or JavaScript first?
The two most recommended first languages. I don't have a specific goal beyond 'get into tech'. How do I break the tie?
How do I fix 'undefined is not a function' and similar JavaScript errors?
I hit these constantly and my approach is basically random edits until it works. What's a systematic way to read and fix JavaScript errors?
How do I know when I'm ready to apply for a junior developer job?
I keep postponing applying because I don't feel ready. Is there an objective bar, or is 'ready' just a feeling I'll never get?
How do I write clean code that other people can actually read?
My code works but when I come back a month later I can't follow it. What are the habits that make code readable?