instal the new for android Screaming Frog SEO Spider 19.1

They don’t click around like a user and load additional events after the render (a click, a hover or a scroll for example).Google still require clean, unique URLs for a page, and links to be to be in proper HTML anchor tags (you can offer a static link, as well as calling a JavaScript function).All the resources of a page (JS, CSS, imagery) need to be available to be crawled, rendered and indexed.

While Google can typically crawl and index JavaScript, there’s some core principles and limitations that need to be understood. JavaScript frameworks can be quite different to one another, and the SEO implications are different to a traditional HTML site. If you’re auditing a website you should get to know how it’s built and whether it’s relying on any client-side JavaScript for key content or links. If you’re already familiar with JavaScript SEO basics, you can skip straight to How To Crawl a JavaScript Websites section, or read on. The exact version used in the SEO Spider can be viewed within the app (‘Help > Debug’ on the ‘Chrome Version’ line).

Like Google we use Chrome for our web rendering service (WRS) and keep this updated to be as close to ‘evergreen’. This means pages are fully rendered in a headless browser first, and the rendered HTML after JavaScript has been executed is crawled. Traditionally website crawlers were not able to crawl JavaScript websites either, until we launched the first ever JavaScript rendering functionality into our Screaming Frog SEO Spider software. While Google are generally able to crawl and index most JavaScript content, they still advise using server-side rendering or pre-rendering, rather than relying on a client-side approach as its ‘difficult to process JavaScript, and not all search engine crawlers are able to process it successfully or immediately’.ĭue to this growth and search engine advancements, it’s essential to be able to read the DOM after JavaScript has been executed to understand the differences to the original response HTML when evaluating websites. Google evolved and deprecated their old AJAX crawling scheme, and now renders web pages like a modern-day browser before indexing them. However with growth in JavaScript rich websites and frameworks such as Angular, React, Vue.JS, single page applications (SPAs) and progressive web apps (PWAs) this changed. Historically search engine bots such as Googlebot didn’t crawl and index content created dynamically using JavaScript and were only able to see what was in the static HTML source code.

Instal the new for android Screaming Frog SEO Spider 19.1