#JavaScript SEO
JavaScript SEO deals with websites whose content or links are created in the browser by JavaScript instead of being present in the HTML the server sends. Search engines can render JavaScript, but rendering is slower, more expensive and sometimes incomplete. Many AI crawlers do not execute JavaScript at all and only read the raw HTML. That makes server-side rendering, static generation and progressive enhancement important. Articles under this tag explain how to test what bots actually see and how to fix gaps.
2026/10/01 · 8分で読めますURL Fragments and Hash URLs: How Search Engines Treat #
Everything after # in a URL is usually ignored by search engines. What that means for jump links, hash routing in single-page apps, tracking…
2026/10/01 · 8分で読めますInfinite Scroll SEO: Make Endless Pages Crawlable
Infinite scroll can hide most of your products or posts from search engines. Learn how to build it on real paginated URLs so every…
2026/09/30 · 7分で読めますThird-Party Scripts: How Tags and Widgets Slow Your Site
Chat widgets, trackers and tag managers often cost more speed than your own code. Learn how to measure third-party scripts and load them without…
2026/09/30 · 8分で読めますTranslation Widgets and Proxies: Will Translated Pages Rank?
Browser translation widgets and translation proxies look similar to visitors but behave very differently for SEO. Here is what crawlers see in each setup.
2026/09/29 · 8分で読めますTabs and Accordions: Does Google Count Hidden Content?
Does content inside tabs, accordions and read-more toggles count for SEO? How search engines treat it, when it is safe, and how to build…
2026/09/25 · 8分で読めますJSON-LD vs Microdata vs RDFa: Which Structured Data Format?
Three formats can carry Schema.org structured data. How JSON-LD, Microdata and RDFa differ, which one to choose, and how to migrate from one to…
2026/09/22 · 7分で読めますAI Agents Browsing Websites: How to Be Agent-Friendly
AI agents now browse sites, compare options and fill in forms for users. Learn what makes a website easy for agents to use and…
2026/09/21 · 7分で読めますLazy Loading and SEO: What to Lazy-Load and What Not To
Lazy loading saves bytes but can hide content from crawlers and slow your main image. What to lazy-load, what not to, and how to…
2026/09/20 · 7分で読めますURL Inspection Tool: How to Debug a Page Like Google
How to use Search Console's URL Inspection tool to see indexing status, the chosen canonical, rendered HTML and blocked resources, and when to request…
2026/08/30 · 7分で読めますhreflang on JavaScript and Headless Sites: What Can Go Wrong
On JavaScript sites, hreflang, lang and canonical tags often appear only after rendering. How to serve them in the initial HTML and test what…
2026/08/27 · 7分で読めますJavaScript SEO Basics: How Search Engines Render Your Pages
How Google crawls and renders JavaScript sites, where rendering fails, and the practical rules that keep content, links and metadata visible to search engines.
2026/08/26 · 7分で読めますRender-Blocking Resources: What They Are and How to Fix Them
Render-blocking CSS and JavaScript keep the screen blank while they load. How to find them, which to keep, and how to defer, inline or…