Fix invalid links

Google can only follow links declared as valid <a href> elements with crawlable URL values. Invalid links — empty hrefs, JavaScript voids, or non-URL content — prevent PageRank from flowing to linked pages and stop Googlebot from discovering those destinations.

Quick Reference

• Invalid <a> tags (empty href, JavaScript voids, non-URL values) are not crawlable — Googlebot cannot follow them
• Links must use crawlable <a href='...'> elements with valid absolute or relative URLs to pass PageRank and be followed
• JavaScript-only navigation (onClick handlers without href) is invisible to search engine crawlers

Check

Parse all <a> elements on the page. Flag links where href: (1) is empty (href='' or href='#' with no meaningful target). (2) starts with javascript: (e.g., href='javascript:void(0)'). (3) starts with mailto: or tel: — these are valid but not crawlable for page discovery. (4) contains only a fragment identifier that references an anchor not present on the page. (5) is absent entirely (<a> without any href attribute). Report the count per type.

Fix