Trim some character

JavaScript version
const trim = (str, char) => str.split(char).filter(Boolean).join();
TypeScript version
const trim = (str: string, char: string): string => str.split(char).filter(Boolean).join();
Examples
trim('/hello world//', '/'); // hello world
trim('"hello world"', '"'); // hello world
trim(' hello world ', ' '); // hello world