joystream/storage-node/packages/util/stripEndingSlash.js

// return url with last `/` removed
function removeEndingForwardSlash(url) {
    let st = new String(url)
    if (st.endsWith('/')) {
        return st.substring(0, st.length - 1);
    }
    return st.toString()
}

module.exports = removeEndingForwardSlash