regex-join
Merge multiple regexes and strings into one, preserving all the flags, automatically escaping the strings
it-concat
Concat all buffers/strings yielded from an async iterable into a single BufferList/string
fcn
Blazingly fast and extremely tiny library for conditional concatenation of classname strings.
montag
format multiline strings using tagged templates, instead of puting all lines into an array and joining to a string
