When deciding which language is better for interactive charts, there is no definitive answer; it depends on your goals, audience, and data. To make a decision, consider the purpose of your chart, who your target audience is, and the type of data you have. Depending on your answers, you may prefer one language over the other, or use a combination of both. For instance, if you want to create a chart that displays the trends and patterns in a large and complex data set, you might use R to analyze and visualize the data, then JavaScript to add interactivity and web functionality. Alternatively, if you want to create a chart that showcases the impact and relevance of a simple and static data set, you may opt for JavaScript to create an eye-catching and interactive chart that can be easily shared on the web.