How to find difference between two dates using moment code example

Example 1: moment date difference in days

moment(new Date()).diff(moment(new Date()), 'days') // 0

Example 2: moment js date between two dates

target.isBetween(start, finish, 'days', '()') // default exclusive
target.isBetween(start, finish, 'days', '(]') // right inclusive
target.isBetween(start, finish, 'days', '[)') // left inclusive
target.isBetween(start, finish, 'days', '[]') // all inclusive