I need a test runner, so I install "karma" and therefore "braces" and "fill-range" and "to-regex-range" and "is-number" and 100 other things.

Dependencies come with risk and cognitive load: deleted like left-pad or loaded with malware like ua-parser-js. Sometimes that is worth it. But if you need 10 lines to pad a string or validate a number, copy some code off of stack overflow like a real developer. Nobody has to know.