#439 Snake to CamelCase

easy

javascript

Implement a utility function that converts a snake_case string into camelCase.

function snakeToCamel(input: string):

function snakeToCamel(input: string): string

Replace each underscore (_) followed by a character with the uppercase version of that character.
Remove all underscores.
Preserve all other characters (including digits).
Leading or trailing underscores should be ignored (not produce uppercase).
If the input is already in camelCase, return it unchanged.
An empty string should return an empty string.