ɪғ ʏᴏᴜ ᴡᴀɴᴛ ᴛᴏ ɪɴᴠɪᴛᴇ ʏᴏᴜʀ ғʀɪᴇɴᴅs, ғᴏʟʟᴏᴡ ɴᴇxᴛ sᴛᴇᴘs:

1. ᴏᴘᴇɴ ʏᴏᴜʀ ʙʀᴏᴡsᴇʀ
2. ɢᴏ ᴛᴏ ʏᴏᴜʀ ғʀɪᴇɴᴅ ʟɪsᴛ
3. ᴄᴛʀʟ + sʜɪғᴛ + ᴊ ᴛᴏ ᴏᴘᴇɴ ᴄᴏɴsᴏʟᴇ
4. ᴄᴏᴘʏ ᴀɴᴅ ᴘᴀsᴛᴇ ɴᴇxᴛ ᴄᴏᴅᴇ:

Originally posted by author:

const groupID = '103582791472864100';
const friends = GetCheckedAccounts('#search_results>.selectable');
InviteUserToGroup(null, groupID, friends);

5. ᴀғᴛᴇʀ, ᴘʀᴇss ᴇɴᴛᴇʀ ᴀɴᴅ ʏᴏᴜ'ʀᴇ ᴅᴏɴᴇ.