feat: Add Domain Information Card - closes #184#185
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Closes Mrinalray#184 Add a client-side Domain Information Card that parses the scanned URL and displays a structural breakdown (protocol, hostname, subdomain, domain, TLD, path, query, fragment) alongside the existing scan-result card. The card auto-updates on every scan via a single renderDomainInfoCard() call hoisted after the if/else block in checkSecurity(). Changes - domain-info-card.js (new): URL parsing via native URL API, splitHostname heuristic, three render states (idle / error / success), exposes window.renderDomainInfoCard() for script.js integration - domain-info-card.css (new): dark monospace packet-inspector aesthetic, #35d8c8 cyan for populated values, #a8894f amber for missing (—) placeholders, 420px responsive breakpoint, prefers-reduced-motion guard, light-mode overrides via .light-mode class - index.html: +3 lines (CSS link, #domainInfoCard mount, script tag) - script.js: +2 lines (renderDomainInfoCard(url) after if/else, renderDomainInfoCard('') in catch) Known limitation: splitHostname uses a last-label heuristic and does NOT consult the Public Suffix List. Compound TLDs (.co.uk, .com.au) will split incorrectly. A proper fix via psl/tldts is deferred to a follow-up.
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Closes #184
Summary
Adds a Domain Information Card to the URL scanner page that parses the scanned URL client-side and displays a structural breakdown alongside the existing scan-result card.
Changes
domain-info-card.jsURLAPI + render logicdomain-info-card.cssindex.html#domainInfoCardmount div, script tagscript.jsrenderDomainInfoCard(url)after if/else,renderDomainInfoCard('')in catchAcceptance Criteria
URLAPI - no third-party parser-(em dash), not blank/null/undefinedcheckSecurity().light-modeclass on<html>prefers-reduced-motionguard disables animations for accessibilityVerified Edge Cases
https://mail.google.com/search?q=security#resultshttp://example.comhttps://localhost:3000/testnot a urlKnown Limitation (follow-up)
The
splitHostnamefunction uses a last-label heuristic and does not consult the Public Suffix List. Compound TLDs (.co.uk,.com.au) split incorrectly. A proper fix viapslortldtsis a deliberate follow-up - not a silent workaround.