browser-sync
npm install -g browser-sync
https://browsersync.io/json server
npm install -g json-server
npm install -g browser-sync
https://browsersync.io/npm install -g json-server
'123456789'.replace(/(\d+)(\d{3})(\d{2})(\d{2})/, "$1 $2-$3-$4")
12 345-67-89