Web guides
Learn how the browser, HTML, CSS, and JavaScript work together so you can build interfaces with confidence.
Why is web accessibility important and how do you implement it?
Learn practical accessibility basics like semantic HTML, keyboard support, labels, and alt text.
accessibilitya11yhtml
What is CORS and why does the browser use it?
Learn how same-origin policy works, when cross-origin requests are blocked, and what CORS headers are for.
corssecurityhttp
What is a REST API and what does a frontend developer do with it?
See how resources, HTTP methods, and JSON come together in typical web app flows.
restapihttp
How does a browser load a web page from URL to first paint?
Follow the big steps: request HTML, build the DOM, fetch CSS, parse JavaScript, and paint.
renderingbrowserperformance
What is the difference between let and const in JavaScript?
Block scope, re-assignment, and a useful default for safer code in modern JS.
javascriptscopebest-practices
What is responsive web design and why is it important for SEO and UX?
Layout that adapts to viewports, touch targets, and real devices - not only desktop width.
responsivecssmobile