Recently diving into ReactJS and utilizing webpack-dev-server for compiling and checking my code. However, I encountered an issue where after adding a stylesheet as an imported file in the sources, everything appeared correctly in the output folder except for the missing stylesheet file itself. My concern is whether the CSS file is necessary to be present in the output or if the styles are integrated within the output JS file. Interestingly, when I relocated the file, everything seemed to work smoothly without any hiccups. Appreciate any insights on this matter. Thank you.