Definition and Steps of HTML, JS, CSS
HTML tags are an integral element of every page. It is the skeleton. The body of a web page consists of elements and sections. The beginning and end are determined using special tags. The most important sections are the head and body. The head contains parameters and information about the page, such as the page title and tracking, and analytics. The body consists of elements and sections. The main content of the page. Cascading styles are also not limited to a single page. They are used to make several sections of the site appear the same. Write the code that sets the style and add a link to the CSS file in the head section. This is convenient not only in order not to duplicate the same code many times. This approach allows you to make edits in the main CSS file, rather than refreshing each page separately. Edit one file to see the results on all pages. In complex and large projects, style sheets can be thousands of lines long. This can affect the speed of their work, since loading an external file of this size is not a good practice. You may notice that on the first visit or after clearing the cache, some web pages jump or blink when loading. Most often this is due to the fact that the page elements are loaded first and only then the CSS file that determines the order in which they are displayed. Therefore, confusion can arise. The page begins to display the changes, having received new instructions from the loaded style sheet.
Read the related article – How and Why Search Engines Render Pages.
JS Processing, Validation, and Testing Features
There are usually several scenarios. Some may require additional libraries or modules. Together, they increase the number of external requests. Multiple HTTP requests to external files are not inherently dangerous. When a page needs to go to hundreds of other servers, find and process the files therein to load and display the content, user experience can suffer. A scripted page can show poor performance on devices. It does not depend on the use of external or locally stored scripts. Similar problems can be observed with sites built on free CMS, such as WordPress. One of the reasons for this behavior can be a large number of installed plugins and widgets in the page code.
Another way is code optimization. Being able to optimize your code implies that you have the correct permissions. You can optimize external storage where the file is located to make changes. An alternative would be saving the optimized code locally. Fortunately, there are many tools to automate this process, so you probably won’t have to do the optimization manually. Basically, these tools are aimed at routine checks. For example, reducing the amount of unused text information in the body of the script can reduce the size of the final file by at least 10%. One of the disadvantages of automatic optimization is the possible discomfort during further work with the code. This is only important if you plan to make changes in the future.
If you are not sure if any of the pages are available for indexing by a search bot, use the Live Test as part of the link verification tool available in the Google Search Console.
If your scripts manipulate the content of a page by tracking user actions, consider that the search bot will not be able to activate them. Pop-up windows or tooltips when scrolling down the page will simply not be displayed. If for a real user the visible area of the page is limited by the screen size, the search bot draws the entire page at once from top to bottom. The need for scrolling and mouse-related actions is eliminated. There is a simple rule of thumb for a page to successfully pass a Google audit: any content implemented via scroll tracking events must include passive attributes. This applies to events and attributes that the search bot simply does not activate.
A good illustration is the lazy loading of images. This technique is convenient, can drastically reduce the size of the upload data, and make the site faster. Since the loading of images is activated when scrolling through the content, they may be missing. If the images are not indexed, you will lose one of the valuable channels for attracting search traffic through multimedia content. Lazy loading doesn’t guarantee responsiveness. One of the main requirements of Google for uploading images is to use only what is in the visible area of the site. Let’s say you have created a gallery and thumbnails of the following pictures are displayed under the main image. All images are lazy-loaded, but if your page continues to load thumbnails when switching to the mobile interface, which will not actually be displayed on the device screen, the validation will fail.
4. Take a few basic checks if you notice that Google is not indexing pages
There may be very specific reasons for refusal to index some pages. Specifically, Google may postpone re-indexing in the following cases:
- Timeout on page load
- Errors when rendering the final version of the page
- Skipped critical external resources that are important for correct page rendering
- The content on this page has not passed basic Google testing for quality and reliability
- The page could not be accessed due to a lack of internal links or incorrect sitemap
Many factors can affect how quickly and how efficiently site content is indexed. Therefore, do not neglect regular baseline checks and real-time website health tracking.