This compilation explores recent and upcoming CSS/HTML features that are significantly shaping web development. It provides case studies on Container Queries, the :has() pseudo-class, CSS Nesting, and Declarative Shadow DOM, detailing their conceptual background, standardization process, and browser implementation, particularly within Chromium/Blink. The sources highlight the evolution of these features from initial proposals to widespread adoption across major browsers like Chrome, Safari, and Firefox. Additionally, the text offers strategies for tracking and contributingto emerging web standards, emphasizing the importance of collaboration and understanding implementation challenges.