I'm trying to set a Local Development Server for Lightning Web Components according to this link but when I try to install the plugin @salesforce/lwc-dev-server I get this error message :

Code: ShellParseError

and a .js file named npm-cli.js opens in my editor with this content:

#!/usr/bin/env node 
require('../lib/cli.js')(process)

Anyone knows what to do? Thanks in advance.

I have DOB (API Name : BirthDate__c) and I want to calculate age in years and months. I have created two formula fields
 

Age in years

FLOOR((TODAY()- BirthDate__c )/365.2425)

 

Age in months (remaining months)

FLOOR(MOD((TODAY()-BirthDate__c),365.2425)/30)

If date of birth is 11 Aug 2013 and todays date is 11 Aug 2015, this gives result as 1 year 12 months. Instead the result should be 2 years 0 months.