What is the purpose of <main> tag?
Interviewer Expectations for this Question
01
Core Competency
Assesses fundamental understanding of HTML & CSS conventions, runtime behavior, and memory/performance considerations.
02
Evaluation Criteria
Hiring managers look for precision, avoidance of ambiguous jargon, and ability to explain trade-offs under real production conditions.
Comprehensive Model Answer
Verified Solution
The <main> element represents the dominant, central content unique to the document.
### Rules of Usage:
- Content inside
<main>should be unique to that specific page and exclude content repeated across multiple pages (such as global navigation links, copyright footers, sidebars, and logo banners). - A document must not have more than one non-hidden
<main>element. - It must not be nested inside
<header>,<footer>,<nav>, or<article>.
### Accessibility Role:
Exposes an explicit ARIA landmark (role="main"), enabling keyboard and screen reader users to skip repeated navigation bars and jump straight to the primary topic.
Candidate Response Strategy & Interview Tips
- Start with a concise one-sentence summary: Deliver a direct, confident answer first before expanding into nuances.
- Demonstrate real-world trade-offs: Discuss where this approach excels and when you would avoid it in production systems.
- Discuss complexity & edge cases: Proactively explain time/space complexity or boundary conditions (null values, scale limits).
- Prepare for interviewer follow-ups: Technical hiring panels frequently probe deeper into concurrency, backward compatibility, or alternative libraries.