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This article discusses various methods for improving the performance of JavaScript interfaces, which are critically important in the context of the rapid development of digital technologies. Effective, responsive interfaces not only attract and retain users, but also improve the position of websites in search engines and increase conversion rates. The research covers topics related to reducing the number of requests, asynchronous programming, optimizing data loading and caching. The article provides specific examples and tips, such as minimizing queries, using local variables to increase the speed of code execution, using event delegation methods and algorithmic optimization. Tools for diagnosing and fixing performance issues such as Lighthouse and Google PageSpeed Insights are also being considered. These recommendations and techniques have been tested and systematized by experienced developers to achieve the best results in improving JavaScript performance.
Blahodelskyi Oleksandr Serhiyovych (Mon,) studied this question.