how to use browser sync code example

Example: browser sync

../
chakracore-nightly/                                17-Nov-2019 05:30                   -
chakracore-rc/                                     23-May-2018 21:45                   -
chakracore-release/                                17-Nov-2018 08:25                   -
docs/                                              04-Jan-2021 18:14                   -
next-nightly/                                      30-Aug-2015 08:29                   -
nightly/                                           07-Jan-2021 06:30                   -
rc/                                                14-Dec-2020 11:00                   -
release/                                           04-Jan-2021 18:14                   -
test/                                              30-Dec-2020 15:30                   -
v8-canary/                                         05-Jan-2021 10:30                   -