A trick I use to make the JS code more maintainable is to wrap code into pure functions that returns an element. For example if you need an input that only acce

A trick I use to make the JS code more maintainable is to wrap code into pure functions that returns an element. For example if you need an input that only accept numbers: var input = makeInputThatOnlyAcceptNumbers() where the function returns the element, and all nitty gritty state handling is done inside the function.