This thesis explores the optimization of search engine visibility for websites built with modern JavaScript frameworks. It includes a comparative analysis of prototypes developed using these frameworks to identify best practices in SEO (Search Engine Optimization) strategies, their effectiveness, and their impact on search engine visibility. By developing and comparing these prototypes, the thesis aims to provide a comprehensive guide to enhancing website discoverability and ranking in search engine results. The thesis will explore the following topics: - The selection of a diverse set of JavaScript frameworks for analysis, - Prototype development using the selected frameworks to serve as the basis for SEO comparison, - Evaluation of each prototype's search engine performance using multiple SEO tools, focusing on metrics and visibility, - Identification of the best practices and strategies that enhance SEO across different frameworks.