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JavaScript

Coding tips and build notes by Mahir Faysal, a student web developer in Bangladesh: tested Python, HTML, CSS, JavaScript and PHP tutorials, plus notes from my Next.js and Gemini projects. Sample posts are marked and drafts stay in the admin area.

Build an Offline Habit Tracker With localStorage
Coding tips

Build an Offline Habit Tracker With localStorage

A small offline habit tracker in plain HTML and JavaScript: habits saved as JSON in localStorage, streaks from local dates, a 7-day row and a JSON backup.

October 2, 2026 · 10 min read

JavaScript Async/Await Tutorial for Beginners
Coding tips

JavaScript Async/Await Tutorial for Beginners

A beginner async/await tutorial: async functions, try/catch, fetch with response.ok, Promise.all for parallel work, retries, and the forEach mistake to avoid.

October 2, 2026 · 11 min read

JavaScript map, filter and reduce Explained
Coding tips

JavaScript map, filter and reduce Explained

JavaScript map, filter and reduce explained with practical examples: transform, keep and combine array items, chain them, and avoid the classic mistakes.

October 2, 2026 · 11 min read

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