Javascript regular expression: remove first and last slash

Question

I have these strings in javascript:

/banking/bonifici/italia
/banking/bonifici/italia/

and I would like to remove the first and last slash

Answer 1

In case if using RegExp is not an option, or you have to handle corner cases while working with URLs (such as double/triple slashes or empty lines without complex replacements), or utilizing additional processing, here's a less obvious, but more functional-style solution:

const urls = [
  '//some/link///to/the/resource/',
  '/root',
  '/something/else',
];

const trimmedUrls = urls.map(url => url.split('/').filter(x => x).join('/'));

console.log(trimmedUrls);

In this snippet filter() function can implement more complex logic than just filtering empty strings (which is default behavior).

Word of warning - this is not as fast as other snippets here.