Best practices in Front-End Development.

Performance as a Feature: Treating load time as a critical UX metric. It’s not just about minification; it’s about optimizing the Critical Rendering Path—ensuring the browser can paint the "above-the-fold" content as fast as possible by deferring non-essential scripts and styles.

Maintainable CSS Architecture: Moving beyond the "write and forget" mentality. Adopting strict naming conventions like BEM (Block Element Modifier) or methodologies like OOCSS to prevent specificity wars and ensure that changing a style on one page doesn't break a layout on another.

Accessibility is Engineering: Rejecting the idea that accessibility is an "afterthought." Best practice means writing semantic HTML (using <button> not <div>) and proper ARIA roles from the start, ensuring the web is usable by keyboard and screen reader users alike.

Progressive Enhancement: The philosophy of building a resilient core experience first. The site should function on basic browsers with just HTML/CSS, and then "enhance" itself with JavaScript interactivity for capable modern browsers, rather than breaking completely if a script fails.