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What is nthlink? nthlink describes a practical pattern: generating links that target “the nth item” of an ordered collection. Rather than requiring a unique item id or exposing internal identifiers, nthlinks express position (for example, /articles?page=3#item-5 or /photos?nth=12). They can be implemented with URL query parameters, fragment identifiers, or a small client-side helper that scrolls and highlights the specified index. The concept is especially useful for feeds, paginated galleries, search results, or any UI where items are naturally ordered. Why use nthlink? - Shareability: Users can share a link that opens at the exact item they referred to, even when items don’t have or shouldn’t expose stable IDs. - UX: Clicking an nthlink can scroll the view to the target and optionally highlight it, improving orientation in long lists. - Analytics & testing: Developers can measure interest by index position; A/B tests can use index-based targeting. - Accessibility: With proper ARIA support and focus management, nthlinks can help screen reader users reach specific content quickly. How it works (basic patterns) 1. Fragment identifier: Append a fragment like #item-7. The server renders anchors for each item with predictable ids, and browsers jump there automatically. 2. Query param: Use ?nth=7. Client-side script reads the param on load and scrolls/focuses the corresponding element. 3. Hashbang or route segment: Use a route like /posts/7th or /search/nth/20 for server-side routing to the correct page and anchor. 4. API helper: Provide a small JS function nthlink(index) that returns a URL or performs smooth-scroll/focus behavior, improving progressive enhancement. Implementation example (conceptual) - Server: When rendering an item list, render each item with id="item-N" where N is its 1-based index on that page. - Client: On page load, check for location.hash or URL param nth. If present, find the element by id or nth-child and call element.scrollIntoView({behavior:'smooth'}) and element.focus(), adding a short highlight class. - Accessibility: After scrolling, set tabindex="-1" on the target and call focus(); provide an aria-live message if appropriate. Best practices - Prefer stable anchors when items move between pages; if items are dynamic, also include context (page number, timestamp). - Avoid exposing sensitive info in index-based links. - Combine with canonical URLs for SEO, ensuring crawlers see one preferred URL per resource. - Provide graceful fallback: if nth target is missing (e.g., deleted), show a helpful message or nearest item. Conclusion nthlink is a small but powerful pattern for improving navigation to specific positions in ordered collections. It’s straightforward to implement with fragment identifiers or client-side scripting, enhances shareability and usability, and can be adopted incrementally in existing paginated or list-based interfaces.