30 Days of JavaScript (official LeetCode study plan)

Language-level exercises grouped as closures, function transformations, promises and time, JSON handling and classes.

Not attemptedLeetCodeAccess: free-account

The exercise happens on LeetCode. Canonical link: https://leetcode.com/studyplan/30-days-of-javascript/. Link check: not checkable automatically (5 Oct 2026). Opened from this app 0 times; opening is not counted as an attempt.

Check note: Not requested individually: leetcode.com refused or challenged earlier automated requests (HTTP 403), so the check stopped contacting it. Open the link in a browser.

Supports: JavaScript and TypeScript fluency for frontend and full-stack interviews; the problems accept TypeScript solutions.

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