MERN Practice

Build the data rules behind an online marketplace where people post items for sale. You'll make sure every listing keeps a clean, correct price, only allows valid item conditions (like new or used), and gets its own unique ID automatically - the kind of behind-the-scenes rules that keep a shopping site trustworthy and tidy.

Build the rules that keep a school course catalogue honest —-each school runs its own courses (codes can repeat across schools, never within one), retired courses free their codes for reuse, seats and credits stay in sensible limits, and sign-up dates can't close before they open.

Build the data model for a workout-logging app: store each session's sets, validate them, surface the heaviest lift, and return clean data.

Manage a library's book loans. Check a book out to a borrower with a due date, see everything currently on loan at a glance, mark a book returned, and remove old records. A clean desk for whoever runs the circulation counter — issue, track, and close out loans in a few clicks.

Browse an online course and the lessons inside it. Pick a course to see its lessons, add a new lesson to that course, and each course keeps its own lessons separate from every other.

Manage a team's job postings. Open a vacancy, change its details, and save - a small edit updates only the fields you touched, while a full rewrite replaces the whole posting. Reusing a posting code that's already taken is refused, and invalid values are flagged field by field.

Search a city's restaurants by name and only ever see the ones that are open. Type part of a name, narrow by cuisine and a price range, and closed spots stay hidden.

Browse a ranked feed of stories and tap any headline to read the full article. The list loads fast and stays light, while an article's full text is fetched only when you open it.

Search a hotel chain's room inventory - filter by city, room type, and price to see how many rooms match, which cities still have rooms available, and whether a specific room exists.

Browse an online bookstore's catalogue - search books by title or author, filter by format, sort the shelves, and page through the results.

Browse a feed of rental homes. The page loads the latest listings and shows each home's photo, price, and size - handling the in-between moments too: a placeholder while results load, a friendly message with a "try again" when something goes wrong, and a clear notice when there's nothing to show.

Browse a warehouse's stock as a table - see each item's quantity, price and delivery date, spot which items are low or out and how many to reorder, sort by any column, filter by status or search, and read the total inventory value.

Browse a recruiter's candidate shortlist and open any candidate to see their full profile - role, experience, location, skills, and summary. Clicking quickly down the list always shows the candidate you last picked, never a stale one.