Does your web site use JavaScript (JS)? It most likely does like most web sites.
In that case, you need to use our Site Audit instrument to uncover extra points than earlier than.
Google renders your webpages’ unloaded JS to see its full content material and to verify your on-line guests can simply entry every little thing too. Now, our Web site Audit bots render JavaScript in the identical approach to determine any hidden points in your web site.
Right here’s how we had been in a position to try this.
What’s New in Web site Audit?
We’ve allotted extra assets so we are able to crawl and render your web site’s JavaScript. This implies we are able to accurately crawl websites largely constructed on JavaScript, even when they’re client-side rendered.
To point out you the distinction, check out a earlier than and after:
This is one audit with JS rendering enabled and one other audit (of the identical web site) with JS disabled.

See the massive distinction between the variety of errors and warnings earlier than and after? With JS enabled, it will probably correctly determine the problems that have to be mounted.
How Does JavaScript Affect search engine marketing and Why Does It Matter?
JavaScript rendering is when a web site’s JavaScript information are correctly executed and exhibited to web site guests.
How these information flip from strains of code to an interactive web site in your browser can occur in just a few methods (like client-side vs. server-side rendering). Every has its execs and cons. Nevertheless, websites that use JS and client-side rendering would possibly run into crawling problems, particularly for tech audit bots.
Why does that occur? In brief, it comes right down to assets.
Google has the assets to load each static HTML and injected HTML as soon as a web site’s JS is executed. However some web site auditing bots don’t have the assets to deal with that process (like ours earlier than this replace).
Right here’s what Airbnb would appear to be to a bot that may’t render JS.

And right here’s what it will appear to be to a bot that may execute and render JavaScript.

What Occurs When Google Renders a Web site’s JavaScript?
When Google renders a web site’s JavaScript, it first sees if any JS must be executed within the first place. If it does, it goes right into a queue after which will get executed/rendered to disclose the webpage’s full content material. Then, Google indexes it.
Right here’s what that appears like:

Previously, we weren’t capable of execute that stage above the place a bot processes the JavaScript and renders it. Now our course of is analogous (minus the indexing).
Why Ought to You Allow JS Crawling in a Web site Audit?
You may not see the complete image of your web site’s points with out enabling JS in your subsequent web site crawl.
Enabling JS might provide help to discover related points that had been probably missed earlier than.
Particularly for websites constructed on the app shell mannequin (the place core elements are loaded, however often not the majority of a web site’s content material—consider the sooner Airbnb instance).
Some JavaScript websites could use the app shell mannequin the place the preliminary HTML doesn’t comprise the precise content material and Google must execute JavaScript earlier than with the ability to see the precise web page content material that JavaScript generates.
How Does Web site Audit JavaScript Rendering Work Now?
1. We obtain the preliminary HTML from the online server throughout crawling
2. We load the JS assets which might be linked on this HTML
3. Execute and render JS code
4. Wait 5 seconds
5. Web site Audit makes use of the ultimate HTML for additional evaluation steps
If you select to disable JS in Web site Audit, we use the unique HTML as we did earlier than.
Does Enabling JS Have an effect on My Limits?
No, it won’t have an effect on your limits in case you select to allow JS on Web site Audit. Nevertheless, solely these with Guru or Enterprise subscriptions can use this function.
Will It Set off Trackers, Adverts, and Occasion Handlers?
No, Web site Audit won’t set off trackers, advertisements, and occasion handlers (i.e. JS triggered by clicking or scrolls). Right here’s what we block when our Web site Audit bot crawls a web site:
- GA4
- GA3
- Yandex Metrica
- Amplitude
- Adobe Analytics
- Google Adverts
- OWOX
- SpeedCurve
Does Web site Audit Use Chrome for Rendering JS?
Sure, we use the most recent Chromium rendering engine. So, we use the identical expertise as Google does for crawling.
The best way to Crawl Your Web site’s JS with Web site Audit
Crawling your web site’s JS with Web site Audit is straightforward. First, go to the Site Audit instrument and click on the ‘create venture’ button.

Subsequent, it’ll immediate you to arrange the audit. The one distinction is that you simply’ll select ‘enabled’ for ‘JS-rendering’ within the crawler settings. You possibly can nonetheless go away it disabled in case you’d like or change it later.

You possibly can test in case your audit is rendering your web site’s JS by wanting up right here within the report:

The best way to Crawl an Present Undertaking’s JS with Web site Audit
If JS rendering isn’t enabled on a present venture, you may change that within the Web site Audit settings.

From right here, simply click on the “re-run marketing campaign” button to crawl your web site with JS enabled. You possibly can disable JS rendering in the identical method if you wish to change it again later.
Discover All Of Your Web site’s Points with JS Rendering
JavaScript makes websites extra interactive, dynamic, and personalised. For instance, Netflix makes use of JS to replace the physique of a single net doc for a speedy, seamless expertise.
Equally, many web sites use the app shell mannequin (in addition to client-side rendering) to learn each the person agent and the positioning proprietor in their very own methods. Your web site could use JS to attain the identical outcomes. And in case your web site does, we are able to determine what points Google could run into with Web site Audit’s new JS rendering function.