Usually helps to be more descriptive when naming functions. filter is a very generic name, which would be fine if the function was doing something generic, but the logic is actually very specific to your application. Without looking at the function body, I'd have no idea what it was filtering.
https://github.com/fac-13/jeth/blob/55aa475205ea69a649432a9c9cfd0b7e1854d083/src/logic.js#L4
Usually helps to be more descriptive when naming functions.
filteris a very generic name, which would be fine if the function was doing something generic, but the logic is actually very specific to your application. Without looking at the function body, I'd have no idea what it was filtering.