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小结：
1、
Google has to process JavaScript multiple times in order for it to fully understand the content in it. This process is known as rendering.
Render Javascript With Search ENGInes in Mind | Prerender https://prerender.io/
Dynamic Rendering | Google Search Central | Google Developers : https://developers.google.com/search/docs/guides/dynamic-rendering
When a user visits a JavaScript site, their browser downloads several files and executes the code to figure out how the page should look. This is called client-side rendering because it uses the compuTing power of the client device.
That’s fine for most human users, but search ENGIne crawlers move quickly, learning as much as possible without using up their compuTing @R_874_5550@es. So when they find a JavaScript site, they might read only a few pages and get an incomplete picture of it.
Crawlers also have a second queue for rendering, adding JavaScript sites to the index too late, resulTing in poor rankings.
JavaScript sites can be rendered on the server side instead, but doing so is hard work for the server, can be tricky and produce slow or lost interactive elements.
That’s where dynamic rendering comes in. The server can disTinguish between human and robot, giving the human the full experience and the robot a lightweight HTML version.
Dynamic rendering is preferred by search ENGInes and comes without an SEO penalty for cloaking content, making it the clear best choice.
Dynamic Rendering: How It Can Lead To SEO success - Prerender https://prerender.io/how-to-be-successful-with-dynamic-rendering-and-seo/
December 11, 2020 • Dynamic Rendering
JavaScript web pages make SEO, an already tricky field, much more complicated.
SEO is one of the more technical fields within the digital markeTing space. It’s like the popular circus act where the juggler spins three plates on poles. Technical SEO is like doing that on a tightrope. JavaScript SEO is lighTing the tightrope, the plates, and yourself on fire.
It’s a tricky balancing act. Not only does your website need to be formatted in a way that makes it easy for search ENGInes to process it, but it needs to perform better and load faster than the competition.
However, the nice thing about technical SEO is it’s one of the ranking factors that you have direct control over.
How do you make your JavaScript website easy for Google to read and understand, while giving your visitors a good web experience at the same time?
The answer: Dynamic rendering.
We’ll break down what dynamic rendering is, why it’s important, why it’s beneficial for your website’s SEO health, and how to implement it.
Google uses an automated program, known as a bot, to index and catalogue every web page on thE internet.
Google’s stated purpose is to provide the user with the best possible result for a given query. To accomplish this, it seeks to understand what content is on a given web page, and assess its relative importance to other web pages about the same topic.
@H_395_0@most modern web development is done with three main progrAMMing languages: HTML, CSS, and JavaScript.Google processes HTML in two steps: crawl and index. First, Googlebot crawls the HTML on a page. It reads the text and outgoing links on a page, and parses out the keywords that Help it determine what the web page is about. Then, Googlebot indexes the page.
Google, and other search ENGInes, prefer content that’s rendered in static HTMl.
With JavaScript, this process is more complicated. Rendering JavaScript comes in three stages:
Google has to process JavaScript multiple times in order for it to fully understand the content in it. This process is known as rendering. When Google encounters JavaScript on a web page, it puts it into a queue and comes BACk to it once it has the @R_874_5550@es to render it.
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