This is a basic streak counter - inspired by Joe Previte and his inspiration on Duolingo - written in TypeScript and due to the use of localStorage, it is meant for web browsers.
npm install @guguponce/streak-counteryarn add @guguponce/streak-counterUsage import {streakCounter} from '@guguponce/streak-counter'
const today = new Date() const streak = streakCounter(localStorage, today) // streak returns an object: // { // currentCount: 1, // lastLoginDate: "11/11/2021", // startDate: "11/11/2021", // }