Web development in 2021 is characterized by several key trends aimed at enhancing user experience, efficiency, and security. Mobile-first development remains crucial, especially with Google's Core Web Vitals update emphasizing page experience as a ranking factor. Dark mode user experiences are increasingly popular for their aesthetic appeal and energy-saving benefits. The adoption of voice user interfaces and progressive web applications is on the rise, reflecting a shift towards more interactive and accessible web experiences. Augmented and virtual reality are gaining traction, offering novel and immersive interactions, while AI-powered chatbots are transforming customer service by providing immediate assistance. Frameworks like React, Angular, and Vue continue to dominate the single-page application landscape, with emerging frameworks like Svelte and Alpine.js gaining popularity. Cloud computing, automation testing, and API-first development are essential for enhancing development speed, scalability, and cross-platform accessibility. Additionally, cybersecurity and data compliance are critical as cyber threats intensify, with blockchain technology and token-based authentication gaining prominence for their security measures. Lastly, no-code/low-code development and the integration of motion UI and 3D elements are making web development more accessible and visually appealing, while TypeScript's popularity is rising due to its robust features and ease of use alongside JavaScript.