JavaScript allows for anonymous functions, and these should be used whenever possible without putting the project’s maintainability at risk. This way, the interpreter no longer needs to resolve the function’s name.
Be aware that this is only good practice when the function is used once. Any function used more than once should be named.

The amount of time a user spends on a website or an online service is the most significant factor in reducing or increasing the website’s environmental footprint. In other words, the less time the user spends on the website or online service, the smaller the environmental footprint.
You must therefore try to minimize the number of screens, steps and unnecessary interactions while at the same time ensuring that screens are not overloaded and too complex, which in itself can be counter-productive.